Engine Repair in San Mateo, CA
Oil leaks, mounts, gaskets, timing belts, head gaskets, intermittent fault codes — we confirm cause with leak-down or live data before opening anything. Photos and itemized estimate to your phone first.
Engine repair covers everything from a $250 valve cover gasket to a $4,500 head gasket job. The trick is figuring out which one your car actually needs. Beacon Auto Care in San Mateo diagnoses with UV dye, compression and leak-down tests, and OEM scan tools — then sends you photos and an itemized quote before we open anything up.
What Engine Repair Covers
- Oil leaks: valve cover, oil pan, rear main seal, timing cover, oil cooler — UV-dye traced to the actual source
- Engine and transmission mounts: clunk on shift, vibration at idle — common at 80k+ miles
- Belts: serpentine, accessory, and timing belt + water pump service
- Gaskets: intake, head, valve cover, oil pan — most jobs $400–$1,800
- Internal work: timing chain, valve seals, top-end rebuild
- Engine replacement: used / reman / new long-block — when repair math doesn't add up
Engine Repair Without the Guesswork
We confirm before we open anything. Suspected head gasket gets a block test or compression and leak-down before tear-down — many "head gasket" diagnoses from other shops turn out to be a much cheaper external gasket leak. Oil leaks get UV dye tracing so you don't pay for guesses. While the engine bay is open, we check the basics — an overdue oil change or a cracked drive belt often turn up.
- UV dye + compression / leak-down testing before any tear-down
- OEM-equivalent or genuine OEM parts; brand-specific specs for European cars
- Photo evidence of the actual leak or worn part — not just a description
- Itemized estimate before any work — bill matches the estimate
- 24-month / 24,000-mile warranty on parts and labor — the same guarantee on every repair we do
Check engine light on, codes you don't recognize? Start with Check Engine Light Diagnostic — that's where we identify what (if anything) needs repair.
Real Engine Repair Findings
From actual customer cars at our San Mateo shop — photos sent to the customer's phone before any work was approved.
Specific Engine Services
Pick your symptom or service.
Engine Misfire Repair
Misfire codes name a cylinder but not the cause — could be spark, fuel, or compression. We isolate the actual cause with live data before swapping any coils. From $99.
Oxygen Sensor Replacement
We confirm the O2 sensor is actually bad with live data — fuel trims, voltage, response time — before quoting one. Cheap parts cause repeat work. From $200.
Catalytic Converter
California-legal CARB-compliant cats, plus stolen-cat replacement with a shield to make the next theft a lot harder. Backpressure and O2 readings tested first.
Timing Belt Replacement
Belt, tensioners, idlers, and water pump replaced together — they wear at the same rate, and the labor's identical once the front cover is off. Done once, not twice.
Engine Noise Diagnosis
Tick from the top end, knock from the bottom, whine from accessories — we isolate the noise to a system before pulling anything apart. Saves you the wrong repair.
Exhaust Repair
Suddenly loud, a rattle at idle, or a smog-related code — we find the exact leak or rust-through on the lift and replace the failed section, not the whole system.
Transmission Repair
Slipping or harsh shifts are usually fluid, a solenoid, a mount, or a leak — not a rebuild. We diagnose first, fix what we can in-house, and coordinate a rebuild only if you truly need one.
Check engine light on? That's a diagnostic, not a repair — start at Check Engine Light Diagnostic. We pull every code, run live data, and tell you which engine repair (if any) is actually needed.
Common Questions About Engine Repair in San Mateo
What's covered, what it costs, when repair beats replacement, and the bigger jobs (head gasket, mounts, oil leaks) explained.
What does engine repair actually cover at your San Mateo shop?
How much does engine repair cost in San Mateo?
Is it worth fixing my old engine, or should I just replace the car?
Do you do head gasket and oil leak repair?
Engine or motor mount replacement — is that an engine repair?
Do you work on hybrid engines?
Related car symptoms
Other symptom? Tap below — or walk through our triage tool .
What San Mateo Drivers Say About Beacon's Engine Repair Work
Real reviews from real customers — verified across Google, Yelp, and CARFAX.
“I took my Infiniti to Beacon Auto because it was overheating. I always dread going to auto shops by myself because I don't know much about cars. I often worry about being…”
— Cindy Chan
Read more“Fixed an electronic issue for $250 that Toyota said would require a full replacement for $3,000. Great service and great prices.”
— Leeza K.
“My 2014 Volvo started misfiring while driving on the 101 during a recent Saturday afternoon. With the Check Engine light flashing, I decided to play it safe and brought it to a…”
— Darryl Heller
Read more“I needed a very quick diagnosis and exhaust fix with my registration renewal and smog test deadline one business day ahead. Flavio and Mo rose to the occasion and took a genuine…”
— Rocky K.
Read more“I had a great experience with this shop. My car was consistently overheating, and I was worried about potential engine damage. They thoroughly inspected it, confirmed the radiator…”
— Asmaa A.
Read more“Brought my BMW here after 3 other shops diagnose it and failed to fix it or even figure out the problem and Moe was a great help he figured out the issue in no time and fixed it…”
— The King O.
Read more“I highly recommend! I was in the area for a day trip when I noticed my engine light was on. Most car repair shops were closed because it was Saturday afternoon. Luckily, Beacon…”
— Rhonda B.
Read more“I don't like leaving reviews, but this place deserves it. My check engine light was on for two years, and every place I went to always told me that they didn't know what was going…”
— Joon K.
Read moreBook Engine Repair in San Mateo Today
Real engine work — UV-dye leak tracing, compression and leak-down testing, OEM-equivalent or genuine OEM parts. Photo-documented findings before any tear-down. Itemized estimate; bill matches the estimate.