Engine Repair Miami — Diagnostic-First Engine Service Since 1957

Oil leaks, coolant leaks, misfires, overheating, timing service, pre-purchase inspections. We find the actual fault before you authorize the repair.

ASE Master Certified · ASE L3 Hybrid/EV Specialist · Manufacturer-level diagnostic platforms · Written findings before any repair · 2-year / 24,000-mile warranty

[ASE Master] · [ASE L3 Hybrid/EV] · [AAA Approved] · [NAPA AutoCare]

Your car has an engine problem. Maybe a warning light. Maybe a noise. Maybe a leak in the driveway that wasn't there last week. Maybe a quote from another shop that doesn't quite add up. You want to know what's actually wrong — and what the real repair is — before you authorize a dollar of work.

That's what this page is for. Green's Garage has been Miami's diagnostic-first independent engine shop since 1957 — three generations of family ownership, ASE Master Certified, ASE L3 Hybrid/EV Specialist certified, running manufacturer-level diagnostic platforms (PATHFINDER, wiTECH 2, HDS, Subaru Select Monitor SSM-IV, VIDA, Mazda's factory platform, Toyota Techstream) for the brands where we maintain specialty capability. We diagnose first, document our findings in writing, then quote the repair. You decide what to authorize and where to have it done — even if that's not us. Same-week appointments. 2-year / 24,000-mile warranty on any engine repair we perform. Call (305) 444-8881.

Jump to:Oil leak diagnosis · Coolant leak diagnosis · Misfire diagnosis · Overheating · Timing belt & chain · Pre-purchase inspection · Brand specialty depth · FAQ

You're in the right place if you're dealing with:

• An oil leak the dealer says requires major engine access — or that came back after a previous repair
• A coolant leak that's only happening when the engine is hot, or only in stop-and-go traffic, or only after sitting overnight
• A misfire that returned after a coil pack or spark plug replacement at another shop
• Overheating in Miami traffic with no visible coolant loss — or overheating only on long highway pulls
• Engine noise that changes with temperature or RPM — knock, tick, rattle, whine, the kind that gets worse the more you drive
• A check engine light that comes and goes on its own, or that returns within days of being cleared
• An estimate from the dealer for major engine work ($4,000+) that you want a second opinion on before you authorize
• A repair that didn't fix the problem — same fault returning two weeks after you paid $1,000+ to address it
• A high-mileage engine you're deciding whether to repair or replace — and you need a real evaluation, not a sales pitch
• A pre-purchase inspection on a used car you're considering — particularly Land Rover, Range Rover, Jaguar, or other high-stakes platforms

If any of this describes your situation, call (305) 444-8881 or schedule a diagnostic online.

How We Diagnose Engine Problems — The Methodology

Most Miami auto repair shops handle engine problems the same way: read the code, look up the most common cause for that code, replace the part associated with the most common cause, and send the customer home. That works until it doesn't. When the fault isn't the most common cause, the customer pays for a repair that didn't fix the problem, returns two weeks later, and pays again for the actual repair. We've seen this pattern hundreds of times in 67 years of business. We do it differently.

1. Symptom interview first. Before we plug anything in, we ask the driver to describe exactly when the problem happens. Hot or cold? Highway or stop-and-go? After fueling? After a specific temperature outside? After sitting overnight? What does it sound like? What's already been tried? Half of misdiagnoses happen because nobody asked the driver the right questions. We ask them.

2. Manufacturer-level scan, not generic OBD-II. We connect using the platform built for your vehicle. PATHFINDER for Land Rover, Range Rover, and Jaguar. wiTECH 2 for Jeep, Ram, Chrysler, and Dodge. HDS for Honda and Acura. Subaru Select Monitor SSM-IV for Subaru. VIDA for Volvo. Mazda's factory diagnostic platform. Toyota Techstream for Toyota, Lexus, and Toyota-platform hybrids. A generic OBD-II reader pulls roughly 5% of what your engine's computer actually knows. The other 95% — fuel trim history, knock sensor data, timing adaptation, freeze-frame conditions, individual cylinder misfire counts, oil pressure logs — that's where the diagnosis actually lives.

3. Targeted physical testing. Scan data points us toward a system. We confirm with the right physical test. Compression test for cylinder seal. Leak-down test for valve and ring condition. Fuel pressure test for delivery faults. Ignition output test on each cylinder. Smoke test for vacuum and induction leaks. UV dye trace for fluid leaks. We don't replace parts to "see if it fixes it." That's how cars come back to the shop a week later.

4. Root cause analysis. A misfire code on cylinder 4 doesn't always mean cylinder 4's coil is bad. It might mean the injector harness has a chafed wire grounding intermittently. It might mean the timing chain tensioner is starved for oil pressure and the chain is jumping a tooth on hard acceleration. It might mean a vacuum leak at the intake manifold gasket pulling unmetered air past cylinder 4 specifically. We separate the symptom (cylinder 4 misfire) from the cause (the actual underlying mechanical or electrical fault) before quoting a repair.

5. Written findings before authorization. You get the diagnosis in writing, with our recommended repair, the cost, and — when relevant — lower-cost / mid / OE parts options. If we're looking at deferred maintenance items beyond the primary fault, we'll list them and let you prioritize. You decide what to authorize. If you want the repair done at Green's, we do it. If you want to take our findings to your usual shop, that's fine. If you want a third opinion, we'll point you toward a specialist.

Engine Oil Leak Diagnosis & Repair Miami

Engine oil leaks are the single most common reason customers come to us with a previous shop's repair that didn't fix the problem. Here's why: oil leaks have a lot of possible source locations, and many of them look identical from underneath the car. A leak that drips onto the exhaust and burns off from one location can be wrongly attributed to a completely different source. Without dye-trace diagnosis or a clean engine before testing, the "most likely" source is a guess.

Common engine oil leak locations we diagnose:

Valve cover gaskets — usually the cheapest fix and one of the most common leak sources. Heat-cycled rubber gaskets harden and crack over time, especially in Miami's sustained heat. External leak, accessible repair on most platforms. Typical leak path: dripping down the back of the engine, pooling near the exhaust manifold, oil residue visible on spark plug wells when valve covers are removed.

Oil pan gasket — second-most-common after valve covers. Slow seep over years that turns into a steady drip after long highway drives. Pan gasket replacement requires dropping the pan, which on some platforms requires subframe removal or significant access work — labor cost varies widely by vehicle. Land Rover, Range Rover, and BMW oil pan access is significantly more involved than Honda or Toyota.

Rear main seal — internal engine leak that drips from the rear of the engine, often confused with transmission front pump seal. Repair requires transmission removal on most platforms (8-12 hours of labor on luxury vehicles). We use UV dye and inspection mirrors to confirm rear main seal failure before quoting the major repair — too often, what looks like a rear main seal is actually a leaking oil pan rear arc or a valve cover dripping down the bellhousing.

Timing cover seal or timing cover gasket — front of engine leak, often visible from above near the harmonic balancer or front of the cylinder head. Repair requires accessing the timing components, which on some engines (BMW N20/N55, Audi 3.0T, Land Rover supercharged V8) means major front-of-engine disassembly. Often misdiagnosed because the leak runs down the front of the engine and drips off the lowest point.

Oil cooler housing or oil cooler seal — common on Jeep 3.6L Pentastar V6, BMW N52/N54/N55, Mercedes V6 platforms, and Range Rover 5.0L supercharged V8. The oil cooler housing on Pentastar engines is particularly notorious — a known failure pattern with predictable symptoms (oil contamination of coolant, coolant contamination of oil, sometimes both). This is a Jeep service we perform routinely.

PCV system failures — on Volvo T5/T6 turbo engines, BMW N20/N52/N54, and some Audi 2.0T platforms, PCV system failures pressurize the crankcase and force oil past every seal in the engine. The symptom looks like a catastrophic oil leak from multiple locations simultaneously. The fix is the PCV system, not the seals. Volvo PCV is one of the most well-known examples — we see this pattern constantly.

Turbocharger seals — on turbocharged engines, failed turbo bearing seals leak oil into the intake or exhaust. Blue smoke under acceleration is the giveaway. Turbo failure is expensive but specific — we don't quote a turbo replacement unless the scan data, intake inspection, and turbo shaft play test all confirm it.

Our oil leak diagnostic process:

We start by cleaning the engine — yes, actually cleaning it — so we can see fresh leak patterns rather than years of accumulated oil residue. Then we run the engine through a normal warmup cycle while observing under lift. UV dye is added to the oil if the leak source isn't immediately obvious. We come back 24-48 hours later and use a UV light to trace the exact leak path back to the source. No guessing. Then we quote the repair against the actual confirmed source.

Pricing transparency: Oil leak diagnostics start at the standard $165 first hour. Complex multi-source leak diagnosis (where multiple seals appear to be failing simultaneously, often a PCV symptom) may need additional time, quoted before we start. The $165 applies toward the repair if you authorize.

Engine Coolant Leak Diagnosis & Repair Miami

Miami's sustained heat is the single biggest accelerator of cooling system failures in this market. Engines that would last 200,000 miles in Boston or Denver see cooling system component failures at 80,000-120,000 miles here. Plastic coolant components (radiator end tanks, expansion tanks, thermostat housings on many European platforms) become brittle and crack. Hoses harden. Water pumps wear faster. The Miami climate doesn't cause unique failure modes — it just accelerates the timeline.

Common engine coolant leak sources we diagnose:

Radiator end tank cracks — common on aging Volvo, Land Rover, Range Rover, BMW, and Mercedes platforms with composite radiator construction. The plastic end tank cracks at the crimp seam where it meets the aluminum core. Repair requires radiator replacement; the plastic isn't repairable for long-term reliability.

Hose failures — upper and lower radiator hoses, heater hoses, bypass hoses. Miami heat accelerates rubber breakdown. Soft, swollen, or cracked hoses are visual diagnoses. Less obvious are internal hose failures where the inner liner collapses on suction and the outer wall still looks fine — these create overheating-under-load symptoms with no visible leak.

Water pump failures — bearing failure (whine that changes with RPM), seal failure (weep hole drip), or impeller failure (mysteriously high coolant temps with no other symptoms). Water pump access varies enormously by platform. On most American engines it's a 3-4 hour job. On Land Rover 5.0L supercharged V8 it's an 8-10 hour job because the supercharger has to come off. Pricing varies accordingly, which is why we quote after diagnosis, not before.

Thermostat housing failures — particularly common on BMW (the famous plastic thermostat housing on N52/N54/N55 engines), Mercedes (the M276 V6 has plastic intake tract and thermostat housing failures), Audi 2.0T (plastic coolant flange), Subaru EJ-series (the metal-to-plastic upper coolant pipe). The plastic-housing pattern is industry-wide because manufacturers used plastic for weight reduction; Miami heat makes plastic fail faster.

Heater core leaks — internal cabin leak, sometimes visible as windshield fogging from inside, sometimes only detectable by sweet smell of coolant in the cabin. Heater core replacement is labor-intensive on most platforms (dash removal required).

Head gasket failure — internal coolant loss into the combustion chamber or oil system. The classic Subaru EJ25 head gasket failure pattern is well-known and we see it constantly on 2003-2010 Outback, Forester, and Legacy platforms. Less commonly, head gasket failure on other platforms creates milky oil, white exhaust smoke, persistent overheating, or coolant disappearance with no external leak. Diagnosis requires combustion gas testing of the coolant or chemical block test.

Intake manifold gasket leaks — coolant cross-over passages in intake manifolds can leak into the cylinder head ports, causing misfires, hard starting, or coolant disappearance. Common on older GM 3.4L/3.8L V6 platforms; also seen on some Land Rover and Volvo applications.

Our coolant leak diagnostic process:

Visual inspection first — half of coolant leaks are obvious if you look in the right places with the engine cold. Then a pressure test of the cooling system at operating pressure (15-20 psi depending on platform) which exposes leaks that only show under pressure but not at idle. Then a combustion gas test if internal leakage is suspected (this confirms or rules out head gasket failure). UV coolant dye is used when the leak source is intermittent or hard to localize.

For overheating without visible coolant loss, we measure system pressure under sustained load — a failed radiator cap, sticking thermostat, or failing water pump impeller doesn't always produce visible coolant. The fault is in the system's ability to circulate or dissipate heat, not in coolant volume.

Why the Miami climate matters: A coolant leak that drips overnight in October doesn't necessarily indicate the same severity as a coolant leak that drips during a July afternoon. The 95°F+ ambient temperatures, sustained heat soak in parking lots, and stop-and-go traffic loads push cooling systems harder than colder climates do. Small leaks in October become catastrophic in July. We treat Miami-context coolant findings with that climate awareness, not generic "drive it and watch it" advice.

Engine Misfire Diagnosis Miami

A misfire is a cylinder that didn't fire when it should have. The check engine light flashes during active misfire and stores codes like P0301 (cylinder 1), P0302 (cylinder 2), and so on through P0308 (cylinder 8) — plus P0300 (random or multiple cylinder misfire). The code tells you which cylinder. It doesn't tell you why.

The four possible misfire causes — and why parts-swap diagnosis fails:

A cylinder misfires for one of four reasons: ignition (spark plug, coil, plug wire), fuel (injector, fuel pressure, fuel delivery), compression (valve, ring, gasket), or air/timing (vacuum leak, valve timing, intake restriction). Many shops swap the coil pack as the first move because coils are cheap and ignition is the most common single cause. Sometimes that's right. Sometimes it isn't.

Cases where coil-pack-swap fails to fix the misfire:

• The misfire is actually a vacuum leak at the intake manifold, pulling unmetered air past that cylinder specifically
• The misfire is a fuel injector with a clogged tip or stuck spray pattern
• The misfire is a worn camshaft lobe (common on certain BMW, Audi, and some Honda K-series engines)
• The misfire is a head gasket leaking compression between adjacent cylinders
• The misfire is a timing chain that's stretched and jumping a tooth under load
• The misfire is an oil leak (from a valve cover gasket) saturating the coil and grounding it out — the coil isn't bad, the leak is

Our misfire diagnostic process:

We start by reading the full freeze-frame data captured by the engine computer at the moment the misfire occurred — engine RPM, load, temperature, fuel trim, throttle position, mass airflow reading. That data narrows the possible causes substantially before we touch anything.

If ignition is suspected, we test coil output and plug condition rather than just replacing. If fuel is suspected, we run fuel pressure with a gauge and look at long-term and short-term fuel trim numbers. If compression is suspected, we run a compression test and follow up with leak-down if needed. If timing is suspected, we look at cam-to-crank correlation data on the scan tool.

Brand-specific misfire patterns we see most often:

Jeep 3.6L Pentastar — left-side cylinder head exhaust port erosion (2011-2013), valve seat issues. Pattern: cylinders 2/4/6 (driver side) misfire.

Honda J35 V6 — VTC actuator faults causing variable valve timing misfires, particularly on cold starts. Sound: brief death-rattle on startup, misfire P0300 random.

Subaru EJ/FB — coil pack failures, but also valve cover gasket oil contamination of plugs and coils. We check the gasket first before quoting coils.

Land Rover supercharged 5.0L V8 — direct injection injector failures, particularly on Range Rover and Range Rover Sport. Misfire P0301-P0308 on individual cylinders, often with rough idle.

Volvo T5/T6 — coil pack failures common at 80-100K miles. PCV-induced oil saturation of coils as a secondary pattern.

Mazda Skyactiv-G 2.5L Turbo — high-pressure fuel pump failures causing low-fuel-pressure-related misfire. P0087 or P0089 fuel pressure codes accompany the misfire codes.

If your misfire returned after a previous repair, we'd particularly like to see it. That's diagnostic-first territory — the previous shop's solution didn't address the actual cause, and we'll find what they missed.

Engine Overheating Diagnosis Miami

Overheating is a Miami specialty problem. The combination of 95°F+ ambient temperatures, stop-and-go traffic on the Palmetto and US-1, and sustained idle time in parking lots stresses cooling systems harder than almost any other U.S. market. We diagnose overheating constantly, and the diagnosis is almost never "just add coolant."

The four overheating patterns and what they actually mean:

Overheating in stop-and-go only — usually a cooling fan failure (fan clutch, electric fan motor, or fan controller relay). The radiator can dissipate enough heat at highway speed via airflow, but the fans don't pull enough air at idle or low speed. Common on most platforms, but specifically: Land Rover and Range Rover (auxiliary fan controllers fail in Miami heat), older Jeep Grand Cherokee (fan clutch issues), and Mercedes (electric fan modules fail).

Overheating on long highway pulls only — usually a marginal cooling capacity issue: undersized radiator (often after aftermarket modification), partially blocked radiator (debris, bug strikes, dirt), water pump impeller failure where the impeller is no longer moving enough coolant at high RPM, or a head gasket developing combustion-to-coolant leakage that builds up over sustained operation.

Overheating everywhere all the time — usually thermostat (stuck closed or partially closed), water pump (complete impeller failure), or radiator (catastrophic blockage). Less commonly: timing belt failure on interference engines (the engine isn't running on all cylinders, generates more heat than the cooling system can handle).

Overheating after sitting hot, then cools off when driving — usually heat soak from a failing radiator cap (can't maintain pressure, coolant boils prematurely) or coolant aeration from a head gasket leak introducing air into the coolant system. The air pockets cause hot spots that resolve when fluid moves.

Common Miami-specific overheating cases:

Land Rover and Range Rover overheating — almost always cooling fan or auxiliary fan controller related. The fan controllers are heat-sensitive and Miami heat shortens their life. We see this pattern weekly during summer.

Jeep Grand Cherokee overheating — fan clutch failure on older WJ/WK platforms, fan controller on WK2.

BMW overheating — water pump failure (the electric water pump common on N52/N54/N55 has known failure patterns) or thermostat housing crack (the plastic housing is a known failure point).

Mercedes overheating — fan controller, thermostat housing, or water pump bearing failure.

Honda overheating — head gasket failure on older H22/F22 platforms, fan switch failure on most platforms, or radiator cap failure.

Subaru overheating — head gasket failure on EJ25 platforms is the dominant cause; this is a known major service we perform routinely.

Don't keep driving an overheating engine. If your temperature gauge has hit the red zone or your engine has spilled coolant from the overflow, pull over. Continuing to drive can warp a cylinder head, destroy a head gasket, or seize an engine — turning a $400 fan controller replacement into a $4,000+ engine repair. Call (305) 444-8881 for a same-day appointment if you're actively overheating.

Timing Belt & Timing Chain Service Miami

The single most expensive engine failure scenario is timing belt or timing chain failure on an interference engine. When the belt or chain fails, valves and pistons collide. The repair is engine replacement or major rebuild — often $6,000-$15,000+ depending on platform. Preventive timing service costs a fraction of that.

Belt vs. chain — knowing what you have matters:

Timing belt — rubber reinforced belt with a manufacturer-specified replacement interval (typically 60,000-105,000 miles). If you have a timing belt, you have a service interval. Most modern engines have moved away from belts to chains, but plenty of vehicles on the road still have them: Honda J35 V6 (Pilot, Odyssey, Ridgeline 2002-2017), Acura J37 V6 (MDX, RL, TL 2007-2014), older Subaru EJ-series (pre-2013), Volkswagen TDI diesel, Toyota 1MZ-FE V6 (pre-2007 Camry, Avalon, Highlander), Mazda older platforms, older Audi 2.7T/3.0T.

Timing chain — metal chain that's lubricated by engine oil and theoretically designed to last the life of the engine. In practice, chains stretch over time, tensioners fail, and chain guides wear. Some platforms have known timing chain issues that require service well before 200,000 miles: BMW N20 / N26 / N52 / N54 (well-known timing chain failures on 2007-2015 platforms), Audi 2.0T TFSI (chain stretch failures), Mercedes M271 / M272 / M273, Land Rover supercharged 5.0L V8 (chain tensioner failures), Jeep 3.6L Pentastar (cam phaser issues that sound like timing chain problems), MINI Cooper N12 / N14 / N18.

Our timing belt service includes:

For Honda J35 / Acura J37 customers (one of our largest timing belt service segments), the standard service is: timing belt, water pump (replaced with the belt because access is identical), tensioner, idler pulleys, drive belt, balance shaft belt where applicable, plus inspection of the cam and crank seals (replaced if any sign of seepage since access is now open). Total parts and labor typically $1,200-$1,800 depending on model and trim. Far cheaper than a $7,000+ engine repair if the belt fails.

Brand-specific timing pages with deeper detail:

• Honda timing belt service Miami →
• Acura timing belt service Miami →
• Land Rover timing chain service Miami →
• MINI Cooper timing chain service Miami →

Timing chain service — diagnostic-first by definition. We don't just "replace the timing chain" because the customer suspects it's bad. We confirm via scan data (cam-to-crank correlation), inspection (oil sample analysis for chain wear particles, valve cover removal for visual chain stretch inspection), and acoustic testing where applicable. Then we quote based on confirmed need, not assumption.

What we don't service: Internal timing chain replacement on BMW N20/N26/N52/N54, Mercedes M271/M272/M273, or Audi 2.0T TFSI chain stretch repairs. Those are German engine internal work outside our scope of capability. We'll diagnose the issue, confirm whether timing chain service is genuinely required, and refer you to a dedicated specialist for the actual repair if it is. The diagnostic itself is in scope; the repair isn't.

Pre-Purchase Engine Inspection Miami

Buying a used car? Particularly a Land Rover, Range Rover, Jaguar, Volvo, Subaru, or other platform with known engine-related failure patterns? A pre-purchase engine inspection is the single highest-ROI use of $165 you can spend in this transaction.

What we check on a pre-purchase engine inspection:

Manufacturer-level scan — current codes, stored codes that were cleared but remain in module history, freeze-frame data on past faults. Sellers (and seller's mechanics) often clear codes immediately before listing the vehicle. We see them anyway.

Compression and leak-down test — confirms cylinder seal integrity. A reading 18% below spec on one cylinder is the difference between a healthy engine and an engine three months from a head rebuild.

Oil analysis — visual inspection of oil condition, oil filler cap inspection for emulsion (head gasket failure indicator), oil dipstick for milky appearance.

Coolant condition and combustion gas test — confirms or rules out head gasket failure that hasn't yet shown symptoms.

Visual inspection — all engine seals, gaskets, hoses, belts, accessory components. Documentation of any active or seeping leak sources.

Documented service history review — what's been done, what's been deferred, what's coming due based on the platform's known service intervals.

Written report you can use — to negotiate the purchase price downward based on documented findings, or to walk away from a vehicle with serious issues. Either way, the $165 either saves you thousands on the negotiation or saves you the entire purchase price on a vehicle you shouldn't buy.

We're particularly equipped for pre-purchase engine inspections on Land Rover, Range Rover, and Jaguar (PATHFINDER factory platform access, deep familiarity with JLR engine failure patterns), Subaru (we know exactly where to look for FB25 oil consumption and EJ25 head gasket signs), Volvo (T5/T6 turbo and PCV pattern inspection), and the Mazda CX-90 PHEV and CX-70 PHEV (one of the few independents with the PHEV high-voltage system inspection capability).

For broader pre-purchase inspection scope beyond the engine, see our Second Opinion page → which covers full pre-purchase inspections including suspension, brake, transmission, and high-voltage systems.

Engine Repair by Brand — Specialty Depth

We service every brand on the road for engine work that falls within our scope. For the brands below, we go further — factory diagnostic platforms, deep familiarity with brand-specific failure patterns, and the parts inventory to match dealer capabilities.

Jeep — wiTECH 2 factory platform 3.6L Pentastar V6 oil cooler housing failure (the classic Jeep service we perform constantly), valve cover gasket service, water pump replacement, ETC throttle body issues, cylinder head left-side exhaust seat erosion on 2011-2013 Pentastars. Wrangler 4xe and Grand Cherokee 4xe PHEV engine systems via wiTECH 2 + ASE L3 Hybrid/EV certification. Jeep Repair →

Land Rover, Range Rover & Jaguar (JLR Group) — PATHFINDER factory platform Supercharged 5.0L V8 timing chain access and tensioner service. Ingenium 2.0L turbo timing chain (a known issue we see frequently), Ingenium oil consumption diagnosis, oil cooler service. Supercharged 3.0L V6 service. Discovery 2.7TD diesel timing belt and high-pressure pump (on older diesel platforms). Range Rover P400e PHEV engine systems via PATHFINDER + ASE L3 Hybrid/EV. Jaguar shares the same platforms and our PATHFINDER tooling applies across the JLR Group. Land Rover Repair → · Jaguar Repair →

Subaru — Subaru Select Monitor SSM-IV factory platform EJ25 head gasket replacement — the classic Subaru repair, we do these routinely on 2003-2010 Outback, Forester, Legacy, Baja. FB25 oil consumption diagnosis and remediation, including documentation for Subaru's extended warranty program on affected VINs (2011-2018 Forester, Outback, Crosstrek, Impreza). Valve cover gasket service. Timing belt service on pre-2013 EJ engines. Lineartronic CVT service is covered on the Subaru hub page →.

Mazda — Mazda factory diagnostic platform Skyactiv-G 2.5L Turbo oil dilution diagnosis (a known issue on 2018+ CX-5, CX-9, Mazda6 Turbo, Mazda3 2.5T). Cylinder deactivation lifter wear on 2018+ Skyactiv-G 2.5L. Normally-aspirated Skyactiv-G valve cover gasket service. Miata MX-5 oil leak diagnostics. CX-90 PHEV and CX-70 PHEV engine systems via Mazda factory platform + ASE L3 Hybrid/EV certification. Mazda Repair → 

Volvo — VIDA factory platform T5 and T6 turbo PCV system diagnosis (the famous Volvo issue causing apparent multi-source oil leaks — the fix is PCV, not seals). Oil consumption diagnosis on T5/T6. Coil pack failure pattern. Recharge T8 PHEV twin-engine architecture service via VIDA + ASE L3 Hybrid/EV certification. Volvo Repair →

Honda & Acura — HDS factory platform (full engine service) J35 V6 timing belt service — Pilot, Odyssey, Ridgeline, Acura MDX, RL, TL on the every-105,000-mile interval. K20 / K24 / K20C valve adjustment service. VTC actuator service. J37 V6 service on MDX and RL platforms. Honda hybrid (Accord Hybrid, CR-V Hybrid, Civic Hybrid, Insight) and Acura hybrid (MDX Type S, RLX Sport Hybrid) engine systems via HDS + ASE L3 Hybrid/EV. Honda Repair → · Acura Repair →

Toyota & Lexus — Toyota Techstream platform (full engine service) 2GR-FE V6 timing service. 1UR-FE V8 service. 2AR-FE 4-cylinder oil consumption diagnosis. Toyota hybrid and Lexus hybrid eCVT and engine systems via Techstream + ASE L3 Hybrid/EV certification. Lexus Repair →

Ram, Chrysler & Dodge — wiTECH 2 factory platform HEMI 5.7L and 6.4L V8 service. Pentastar 3.6L (shared with Jeep) — same oil cooler housing repair we do constantly. Cummins 6.7L turbo diesel service. Chrysler Pacifica Hybrid engine + high-voltage system via wiTECH 2 + ASE L3. Ram Repair →

In-Scope Engine Work for German European Brands

For BMW, Mercedes-Benz, Audi, MINI Cooper, and Porsche, we focus on the engine service categories where our capability genuinely serves the customer well. For internal engine work, transmission rebuilds, timing chain replacement on BMW/Mercedes/Audi, VANOS or vanos-related variable valve timing repairs, or complex multi-system German engine diagnostics, we refer you to a dedicated brand specialist. This honesty is the difference between earning your trust for the next decade and burning it in a single visit.

What we do for German European brands:

• Engine oil leak diagnosis (valve cover gaskets, oil pan gaskets, external seals — all in scope)
• Engine coolant leak diagnosis (thermostat housings, radiator end tanks, hose failures, water pump replacement on most platforms)
• PCV system service (Volvo we treat as specialty; BMW/Mercedes PCV service is in scope on external components)
• Pre-purchase engine inspection (we'll tell you what's wrong; the repair may or may not be in our scope)
• Spark plug service (routine maintenance, in scope)
• Drive belt and accessory service (in scope)
• Basic check engine light diagnostic (we'll diagnose; the repair depends on what we find)
• Oil change and routine engine maintenance (in scope, factory-spec fluids)

What we don't do on BMW, Mercedes, Audi, MINI:

• Timing chain replacement on N20/N26/N52/N54, M271/M272/M273, 2.0T TFSI
• VANOS adaptation or repair
• Internal engine rebuild
• Turbocharger replacement (we'll diagnose; replacement is referred to specialist)
• Complex multi-cylinder misfire diagnostics where the root cause involves internal engine systems
• Engine wiring harness repair on complex German engine looms

If your German vehicle needs work that falls outside our scope, we'll tell you up front and recommend a specialist. We'll also diagnose your issue if you want an independent second opinion before authorizing the work at a brand specialist — same $165 diagnostic fee, written findings you can use to negotiate.

Engine Repair Pricing — Transparent

Repair pricing varies by vehicle and scope. A valve cover gasket on a Honda Civic is structurally different work from a valve cover gasket on a Land Rover Range Rover. We don't publish flat-rate prices for engine repair categories because the labor and parts costs are too vehicle-dependent for a generic number to be meaningful.

What you can count on:

• Written estimate before any repair starts
• All repair work covered under our 2-year / 24,000-mile parts and labor warranty
• No surprises — if we find additional work needed during the repair, we call you before doing it
• Lower-cost / mid / OE parts options where they exist, with the trade-offs explained

For pricing context against the dealer, the Mazda dealer labor rate in Miami is $230/hour and the Subaru dealer labor rate is $250/hour. Our specialty-brand rates are positioned below dealer rates while reflecting the manufacturer-platform tooling, ASE Master + L3 certification, and parts inventory investment specific to those brands. Routine engine work on Honda, Toyota, and other mainstream platforms is priced consistently below dealer rates.

Why Miami Drivers Choose Green's Garage for Engine Work

• Since 1957. Three generations of family ownership. We've diagnosed every engine failure pattern multiple times across multiple decades.
• ASE Master Certified technicians across European, Japanese, American, and luxury platforms.
• ASE L3 Hybrid/EV Specialist for hybrid and PHEV engine systems.
• AAA Approved and NAPA AutoCare member.
• Manufacturer-level diagnostic platforms — PATHFINDER, wiTECH 2, HDS, SSM-IV, VIDA, Mazda factory tool, Toyota Techstream.
• UV dye trace, smoke test, compression test, leak-down test — physical diagnostic tools beyond what generic OBD-II shops use.
• 2-year / 24,000-mile warranty on engine repairs — among the strongest in independent auto repair in Miami.
• Written findings before any repair authorization. Always.
• Same-week appointment availability vs. dealer 2-4 week wait.
• Honest scope of work. We tell you up front what's in our wheelhouse and what isn't.
• Habla Español. Native Caribbean Spanish service.
• Free Uber / Lyft within 5 miles while we work on your car.
• Independent, not a franchise.

Miami Neighborhoods We Serve for Engine Work

Free Uber or Lyft within a 5-mile radius while we work on your car.

Engine Repair FAQ

How much does an engine diagnostic cost? $165 for the first hour. That covers the symptom interview, manufacturer-level scan, targeted physical testing (compression, leak-down, fuel pressure, smoke test, UV dye trace as needed), and written findings. If you authorize repairs at Green's, the $165 applies toward the repair bill.

My check engine light is on but the car drives fine. Do I need to come in? Probably, but not necessarily urgently. The check engine light covers about 6,000 possible fault codes ranging from "loose gas cap" to "imminent catastrophic engine failure." A scan tells you which category your light is in. If you've been driving with the light for weeks and the car still feels fine, schedule for the next available diagnostic. If the light is flashing or the car is running rough, treat it as urgent — flashing light means active misfire that can damage the catalytic converter.

The other shop said I need a new engine. Should I get a second opinion? Yes, before you authorize anything. Engine replacement is among the most expensive repairs in automotive, and the criteria for "engine replacement vs. major repair vs. specific component replacement" varies enormously by what's actually wrong. We see engine-replacement quotes that turn out to be a $1,500 head gasket job, a $2,800 timing chain repair, or a $400 PCV replacement masquerading as multi-source oil leaks. See our Second Opinion page → for the structured second opinion process.

Can you fix a blown head gasket? Yes, on most platforms within our service scope. Subaru EJ25 head gasket replacement is one of the most common engine repairs we perform. Honda and Acura V6 head gasket service is in scope. Land Rover, Range Rover, and Jaguar head gasket work is in scope. BMW, Mercedes, and Audi head gasket replacement is outside our scope — we'll diagnose the failure and refer you to a specialist for the repair if confirmed.

My engine is making a knocking sound. Is this serious? It depends on when the knock happens and what it sounds like. Cold-start knock that fades after 30 seconds is usually piston slap or hydraulic lifter pump-up — annoying but not catastrophic. Knock that gets louder under load is more concerning and could indicate rod bearing wear or pre-ignition. Knock that's accompanied by warning lights or oil pressure drop is urgent — pull over and call for a tow. We diagnose engine noise routinely.

Can you do a timing belt replacement? Yes — Honda J35, Acura J37, older Subaru EJ-series, older Toyota platforms, and other belt-driven engines. See the timing belt section above. Honda J35 timing belt service is one of our largest engine service categories.

Do you work on diesel engines? Yes — Ram Cummins 6.7L turbo diesel, older Volkswagen TDI platforms, Land Rover Discovery 2.7TD on older platforms. Modern diesel emission systems (DPF, DEF, EGR) are within scope on the platforms we service. For specific diesel-only specialists like heavy-duty truck applications, we may refer.

My car overheated and now it runs but feels weak. How bad is the damage? Could be minor, could be severe. Overheating can warp cylinder heads, damage head gaskets, or destroy ring seals. A compression test and leak-down test tell us. If the engine is mechanically sound after an overheating event, you'll need to address whatever caused the overheating (usually thermostat, water pump, fan failure, or radiator) but the engine itself may be fine. If the engine was damaged, we'll find evidence in compression numbers and a chemical block test.

Will engine repair at Green's void my factory warranty? No. Under the federal Magnuson-Moss Warranty Act, independent shops can service your vehicle without voiding the factory warranty, as long as we use equivalent parts and procedures. We document everything to manufacturer specification for your records.

How long do engine repairs take? Depends on the repair. Oil leak diagnostics and a valve cover gasket replacement on a typical platform is a same-day or next-day job. Head gasket replacement on a Subaru is typically 3-5 business days. Timing belt service on a Honda J35 is a 1-2 day job. Complex multi-component engine work on luxury platforms may take longer. We give you a realistic timeline before you authorize.

Habla Español? Sí. Tenemos personal que habla español caribeño nativo. Le explicaremos los hallazgos del diagnóstico y las opciones de reparación en español si lo prefiere. 

Ready to Get Your Engine Diagnosed Properly?

Call (305) 444-8881 for same-week appointments — often same-day for urgent issues like active overheating, no-start, or check engine light flashing. Schedule online and you'll have a confirmation within one business hour.

If you have a written estimate from another shop and want a second opinion on what they quoted, bring it. We'll do our own diagnostic from scratch and compare notes after. See our Second Opinion on Your Estimate page → for how the second opinion process works.

2221 SW 32nd Ave, Miami — three blocks from the Coral Gables border, off US-1.

Habla Español. Free Uber/Lyft within 5 miles while we work. 2-year / 24,000-mile warranty on engine repairs. Independent since 1957.