ZhoopZhoop Collision & Mechanical provides engine repair in Thornhill, from misfires and oil leaks to timing belts, head gaskets and overheating. Our Ontario-licensed 310S technicians diagnose the cause before quoting, explain what’s urgent and what can wait, and start work only after you approve it. We’re at 47 Guardsman Rd, Unit 2, east of Bayview Ave between John St and Highway 407.
Call 905-886-2737 Get a free photo estimate
Why ZhoopZhoop for engine repair in Thornhill
- Ontario-licensed 310S automotive service technicians, plus 310T truck and coach technicians for heavier vehicles.
- Diagnosis first, so you pay to fix the cause and not just the symptom.
- Collision, cooling and mechanical repairs under one roof, which matters when a crash damages the engine bay.
- 90-day warranty on all work, plus a lifetime paint warranty on insurance repairs.
Engine symptoms you shouldn’t ignore
- Check engine light, especially if it’s flashing, which usually means an active misfire.
- Rough idle, shaking or hesitation when you accelerate.
- Temperature gauge climbing, steam from the hood, or a sweet smell of coolant.
- Oil spots under the car, a burning-oil smell, or needing to top up between changes.
- Blue or white smoke from the exhaust.
- Ticking, knocking or rattling, particularly on a cold start.
If the temperature gauge goes into the red or the oil-pressure light comes on, pull over and shut the engine off. Driving even a few more kilometres can turn a repair into a replacement. We can help arrange a tow.
Engine repairs we handle
Timing belts and timing chains
Timing belts wear out on a schedule set in your owner’s manual. On many engines, a broken belt lets the valves hit the pistons. Timing chains last longer but can stretch when oil changes are overdue, causing a start-up rattle or timing code. We usually replace the water pump and tensioners at the same time when they’re driven by the same belt.
Head gaskets
Signs include coolant loss with no visible leak, white exhaust smoke, milky oil, and overheating. We confirm the problem with cooling-system pressure and combustion-gas tests before recommending the job, because other faults can mimic a blown head gasket.
Oil and coolant leaks
Valve cover and oil pan gaskets, main seals and coolant hoses are the usual suspects. We find the true source, which isn’t always where the drip lands.
Misfires
Coils, spark plugs, injectors, vacuum leaks and low compression can all cause misfires. Our diagnostics and check engine light service pins down which one it is before we replace anything.
Overheating and cooling system
We replace water pumps, thermostats, radiators, cooling fans, hoses and expansion tanks, then pressure-test the system. A thermostat stuck open means weak heat in a Thornhill January.
Repair, rebuild or replace?
Most engine problems are fixable without replacing the engine. When the damage is serious, such as a spun bearing, low compression across several cylinders, or a cracked block, we’ll lay out your options:
- Repair the part that failed when the rest of the engine tests healthy.
- Install a used or remanufactured engine when internal damage is extensive.
- Put the money elsewhere when the repair is worth more than the car. We’ll tell you honestly if that’s the case.
We base the recommendation on compression and leak-down results, scan data, and the car’s overall condition, not on which job is bigger.
Engine damage after a collision
A front-end hit can crush the radiator and AC condenser, crack the cooling fan shroud, break engine mounts, and damage intake parts or sensors behind the bumper. Driving after a crash with a coolant leak can overheat the engine and turn a covered collision repair into a much bigger problem. Read should you drive a car with collision damage? before deciding.
Because our collision repair and mechanical teams share a building, we find this damage during teardown and include it in the insurance estimate. Learn more about hidden damage after a car accident and what a collision repair supplement is.
What affects the cost of engine repair
Engine layout matters: a spark plug that takes minutes on one engine means removing the intake on another. Parts choice (aftermarket, OEM or used) and how far damage has spread also count. Call 905-886-2737 for current pricing.
Areas we serve
We fix engines for drivers in Thornlea, German Mills, Royal Orchard, Bayview Glen, Grandview, Doncrest, Thornhill Woods and Langstaff, plus Richmond Hill, Markham and North York, with easy access from Yonge St, Steeles Ave and Highway 404. See all our mechanical repair services.
Engine repair FAQs
Can I keep driving if my engine is overheating?
No. If the temperature gauge reaches the red zone or you see steam, pull over safely and turn the engine off. Continuing to drive can warp the cylinder head or blow the head gasket, turning a hose or thermostat repair into a major one. Let it cool, don’t open a hot radiator cap, and call for a tow.
How do I know if my timing belt needs replacing?
Timing belts often give little warning before they fail, so follow the replacement interval in your owner’s manual. If you don’t know whether yours was ever done, we can check service records and inspect the belt where it’s visible. Many engines suffer valve damage if the belt breaks, so replacing it on time is far cheaper.
How can you tell if it’s a blown head gasket?
Common signs are coolant loss with no visible leak, white exhaust smoke, milky oil and repeated overheating. Other faults can look similar, so we confirm with a cooling-system pressure test and a combustion-gas test before recommending a head gasket repair. You’ll see the results and a written quote before work begins.
Is it worth repairing an older engine?
Often, yes. Most leaks, misfires and cooling problems are affordable compared with replacing a car. When internal damage is serious, we compare repair, a used or remanufactured engine, and not fixing it at all, based on test results and the car’s condition. We’ll tell you plainly if the repair isn’t worth it.
Can a collision damage my engine?
Yes. Front impacts commonly damage the radiator, condenser, cooling fan, engine mounts and sensors. Driving with a coolant leak afterwards can overheat the engine. We inspect the engine bay during collision teardown, include mechanical damage in the insurance estimate, and repair it in the same building, billing your insurer directly.
What warranty comes with engine repairs?
ZhoopZhoop offers a 90-day warranty on all work, plus a lifetime paint warranty on insurance repairs. Your invoice lists the parts and labour covered. If something we repaired isn’t right within the warranty period, call 905-886-2737 and bring the vehicle in so we can inspect it.
Book an engine inspection in Thornhill
Describe the noise, smell or warning light when you call, and we’ll get the car in. Open Monday to Friday, 9 am to 6 pm.