Engine Repair & Diagnostics in Simi Valley, CA

If you hear a knocking or pinging sound from your engine, especially when accelerating, it could be detonation from low-octane fuel, carbon buildup on pistons, worn bearings, incorrect ignition timing, or low oil levels starving components of lubrication.[Oil Changers](https://oilchangers.com/car-overheating/), [Cadence](https://www.cadencepetroleum.com/blog/what-is-engine-knocking/). These issues create uneven combustion or metal-on-metal contact. Low oil pressure often worsens it, leading to bearing damage. Check your oil level first—if low, top it up immediately. For persistent knocking, our ASE Certified technicians at Perry's Quality Auto Repair in Simi Valley can diagnose with a compression test and scope inspection. Backed by our 2-Year/24,000-Mile warranty, get your engine repair handled right and drive smoothly again.

Your engine overheats when the cooling system fails to dissipate heat, often from low coolant levels, a stuck thermostat, faulty water pump, leaking radiator or hoses, or clogged pathways.[Firestone](https://www.firestonecompleteautocare.com/blog/maintenance/when-car-overheats/), [Oil Changers](https://oilchangers.com/car-overheating/). Coolant absorbs engine heat and transfers it to the radiator; without proper circulation, temperatures spike, risking warped heads or cracked blocks. Pull over safely if the gauge climbs—don't drive further. Top off coolant if low, but leaks need fixing. At Perry's, we pressure test the system, flush coolant, and replace parts like pumps or thermostats with our 2-Year/24,000-Mile warranty. Schedule a cooling system inspection today to prevent major engine repair.

The check engine light signals your car's computer detects an issue in the engine or emissions, from minor like a loose gas cap to serious like misfires, bad oxygen sensors, faulty spark plugs, or catalytic converter failure.[Matt’s](https://mattsautoservicecenter.com/10-top-signs-your-engine-needs-immediate-attention/), [Edmunds](https://www.edmunds.com/car-maintenance/what-your-check-engine-light-is-telling-you.html). Steady light means address soon; flashing indicates urgent misfire damaging the engine. Ignoring it worsens fuel economy and risks breakdowns. Don't reset without fixing—codes pinpoint problems. Perry's ASE techs use OBD scanners for accurate engine repair diagnostics, clearing codes post-fix under our 2-Year/24,000-Mile warranty. Stop guessing; bring it in for a scan and get back on the road confidently.

An engine misfire feels like rough idling, shaking at stops, hesitation or power loss when accelerating, sputtering exhaust, or poor fuel economy, often with the check engine light on.[O'Reilly](https://www.oreillyauto.com/how-to-hub/engine-misfire), [Brian’s Tire](https://brianstireandservice.com/engine-problems-and-how-to-catch-them/). It happens when a cylinder fails to combust properly due to bad spark plugs, ignition coils, clogged fuel injectors, vacuum leaks, or low compression. Untreated, it damages catalytic converters. You might smell unburnt fuel too. Early detection prevents bigger engine repair costs. Visit Perry's in Simi Valley for a diagnostic scan and tune-up by ASE Certified techs, covered by our 2-Year/24,000-Mile warranty—have yours inspected before it escalates.

Engine repair costs vary widely: $150-400 for spark plugs or sensors, $400-900 for water pumps, $1,500-3,500 for head gaskets, up to $4,000+ for rebuilds or replacements depending on your vehicle.[Owl-Let](https://www.owl-let.com/blog/how-much-does-engine-repair-cost), [Endurance](https://www.endurancewarranty.com/learning-center/cost-price/how-much-does-an-engine-replacement-cost/). Factors include parts for your make/model, labor rates ($100-250/hr), and damage extent—overheating leaks can escalate fast. Luxury cars cost more. Get quotes after diagnostics to avoid surprises. At Perry's family-owned shop since 2000, transparent pricing and our 2-Year/24,000-Mile warranty ensure value. Come in for an engine diagnostic to know exactly what your repair entails.