OBD-II scanning and live data
Pull codes, freeze frame, and live sensor data. Read the story the engine is telling.
Engine
Engine Repair and Diagnostics in Boulder, CO
From rough idle to full engine repair. We diagnose with the right tools, fix the root cause, and stand behind every repair with a 3-year warranty.
Complete engine diagnostic and repair service for every make. OBD-II scanning, live data analysis, mechanical testing, and root-cause repair. From a stubborn misfire to a head gasket job to a full engine replacement, we tell you straight what your engine needs and what it does not.
From scan tool to short block.
Engine work covers a wide range. We scope the job to your engine, your symptoms, and your goals.
Compression and leak-down testing
Mechanical health check for cylinders, rings, valves, and head gaskets.
Fuel and ignition diagnosis
Injectors, pumps, coils, plugs. The systems that account for most misfires and rough running.
Timing component repair
Timing belts, chains, tensioners, and guides. Catastrophic when they fail, predictable when serviced.
Head gasket service
Diagnosis, repair, and the honest math on whether the job is worth it for your vehicle.
Full engine repair and replacement
Long blocks, short blocks, and complete remanufactured replacements when the case calls for it.
Oil leak diagnosis
We trace the leak to its actual source. Valve covers, pans, rear mains, timing covers, and seals.
When your engine is asking for attention.
If you notice any of the following, do not wait. Small issues become expensive ones quickly.
- Rough idle or stalling
- Misfires under load or at cruise
- Loss of power, especially climbing
- Knocking, ticking, or unusual mechanical noise
- Check engine light on or flashing
- Visible oil, coolant, or fuel leaks
- Smoke from the exhaust at any color
- Overheating or running hotter than normal
How we diagnose an engine.
Scan and live data
Codes, freeze frame, and real-time sensor data captured before we touch a wrench.
Mechanical testing where needed
Compression, leak-down, fuel pressure, and timing verification when the data points there.
Photo documentation of findings
We send images and video of what we found so you see the cause, not just the bill.
Transparent estimate
Line-by-line pricing in writing. Repair, rebuild, or replace, with the trade-offs explained.
Repair with quality parts
OEM-spec or premium NAPA parts. Proper torque, fresh fasteners, no shortcuts.
Verify the fix
Post-repair scan, road test, and a follow-up check to confirm the issue is gone.
Why engine work belongs here.
ASE certified engine specialists
Engine repair is its own ASE specialty. We have certified specialists on staff who do this work every day.
Tools that go beyond code reading
Manufacturer-grade scan tools, lab scopes, smoke machines, and pressure testers. The right tool for the job.
Photo documentation
You see the worn timing chain, the failed gasket, the cracked manifold. No mystery, no guessing.
Warranty backed work
Three-year, thirty-six-thousand-mile NAPA warranty on qualifying engine repairs. Honored nationwide.
Mile-high roads ask more of every vehicle.
Boulder vehicles work harder. Thinner air, hard freezes, dust, sun, and steep grades all wear parts faster than the manufacturer schedules assume. We tune our service intervals to how your vehicle actually lives at altitude.
Altitude
Lean-running engines, harder-working turbos, and drivetrains that climb every commute.
Freeze cycles
Repeated thaw and refreeze chews through seals, hoses, batteries, and brake hardware.
UV and dust
High-altitude sun and grit accelerate paint, plastics, glass, and intake fouling.
Frequently Asked Questions
It depends on the failure, the vehicle's value, and parts availability. Rebuilding makes sense for engines with sentimental value, hard-to-find vehicles, or specific failures like a single bad cylinder. Replacement with a remanufactured long block is often more cost effective for common engines. We give you the honest math both ways.
You may also need
Boulder talks. We listen.
“These guys are honest, transparent, and clearly know what they are doing. They walked me through everything with photos before doing the work.”
Sarah K.
2019 Subaru Outback
“Best shop in Boulder. Free loaner, fair pricing, and they actually care about doing the job right. Will not take my truck anywhere else.”
Marcus T.
2017 Toyota 4Runner
“I am picky about who touches my EV. Legacy was the only shop locally that I trusted with the work, and they delivered.”
Priya N.
2022 Tesla Model Y
“These guys are honest, transparent, and clearly know what they are doing. They walked me through everything with photos before doing the work.”
Sarah K.
2019 Subaru Outback
“Best shop in Boulder. Free loaner, fair pricing, and they actually care about doing the job right. Will not take my truck anywhere else.”
Marcus T.
2017 Toyota 4Runner
“I am picky about who touches my EV. Legacy was the only shop locally that I trusted with the work, and they delivered.”
Priya N.
2022 Tesla Model Y
Ready to Book?
Schedule your engine repair and diagnostics today.
Free loaner vehicles for qualifying repairs. Photo and video documentation on every job. Three-year, 36,000-mile NAPA warranty.