A knock at idle, oil disappearing between services, or a gearbox that slips and hunts on flat road. We take compression and leak-down readings, pull live data off the ECU and drive the car first, so nobody is opening an engine or dropping a box on a hunch.
Both live on this page, because from the driver’s seat they borrow each other’s symptoms. A shudder under throttle can be a misfire or a clutch pack starting to slip, and the two feel close to identical until someone measures.
Skip ahead to engine repair or gearbox repair if you already know which side you are on. If you don’t, start with the symptoms below and we will sort out which it is.
Six things drivers ring us about most on engines and gearboxes. Pick the one closest to yours and tell us the detail on WhatsApp.
Most engine faults whisper for weeks before they shout. A tick that was not there last month, a vibration that arrives around 2,500 rpm, or oil consumption up by half a litre between services all count as early notice. Acting on the whisper costs less than acting on the bang.
Tell us about the noise → 02Engine and gearbox mounts exist to hold the drivetrain still. Once the rubber inside one has collapsed, you feel it through the seat at a standstill and get a thud as you pull away. Tell us where you feel it and we will start there.
Ask about mountings → 03The code is a pointer, not a verdict. It narrows things down to a sensor, a wire, a coil or something on the fuel side, and the investigation proper starts after that. Reading the code is where a lot of workshops stop.
Get it scanned properly → 04Slipping is rarely a dead gearbox. The usual culprits sit outside the gear sets themselves, and they are far cheaper to test for than to assume. We work through those before the word rebuild gets used.
Book a gearbox check → 05It comes and goes with load, usually worst pulling away or holding a steady speed up a slope. A judder from the engine and a judder from the box feel almost the same behind the wheel, which is exactly why the road test happens before the quote.
Describe the judder → 06Darker than new is normal after a few years. Burnt is not, and glinting metal in it is a different conversation again, because fresh fluid cannot put back what has already worn away inside.
Get the fluid inspected →Knock, tick, oil burn and a rough idle each have several possible causes, and those causes overlap. A tick might be valvetrain clearance or an injector simply doing its job loudly. Oil going down might be rings, might be valve seals, might be a leak landing on the undertray where nobody thinks to look. Open an engine on a guess and you have spent somebody’s money finding out.
So the numbers come first. Cylinder compression on every cylinder, then a leak-down test to work out where the pressure is escaping, which is what tells weak rings apart from a burnt valve or a head gasket that has let go. Oil consumption gets measured against the manufacturer figure for that engine rather than argued about. Only after that does anyone talk about what needs opening.
Mountings get their own look, since a collapsed mount fools plenty of people into thinking the engine itself is finished. We put them under load, watch how far the drivetrain travels, and photograph whatever has split. Our guide on engine mountings in Singapore goes through the symptoms, and if it was the light on the dash that brought you here, what a check engine light really means follows the same logic.
When it started, what makes it worse, and what changed just before. A fault that turned up the week after a service is a different conversation from one that crept in over a year.
Idle, urban load and an expressway cruise, with engine behaviour and shift quality noted at each. Some faults only show themselves once the car is warm and moving.
Codes come off first, then the live data sitting behind them. Freeze-frame shows what the engine was doing at the moment the fault logged itself.
Every cylinder gets a compression figure, and any cylinder that reads low gets the leak-down test after it. Together they say whether the trouble is at the top of the engine or the bottom.
Engine oil, coolant, gear oil and ATF checked for level, colour and contamination. Coolant pressure tested, radiator, hoses and water pump looked over for weeping.
Every reading, every photo, and a plain-English summary with an itemised quote for anything you may want to follow up. Nothing comes apart on a hunch.
Slipping shifts, hunting between gears and a shudder that shows up under load will all get quoted as a rebuild somewhere in Singapore. Often they trace back to a solenoid that has worn, a fluid level that has quietly dropped, or a sensor sending the transmission control unit the wrong number. Those are small jobs. Calling them a rebuild without testing is how people end up paying for a box that was never the problem.
The check runs the other way round. The fluid gets read first, then the solenoid pack and pressure switches on live data, shift quality logged at idle, at low load and at full load, and a pan drop to look for clutch material if the symptoms point that way. CVT belts and dual-clutch packs get their own wear check where the car has one.
When a rebuild genuinely is the answer, we say so and show you what led us there. A rebuild here is never limited to the one component that gave up, because half-doing it just brings the car back. If fluid is what you came to ask about, gearbox oil changes and the lifetime fluid myth covers the intervals, and car jerking when you accelerate works through the causes from cheapest upwards.
Every engine and gearbox diagnosis covers the same ground, whichever symptom brought the car in. It finishes with a written report, so you know what is going on with the drivetrain and what we would do about it.
Compression measured on every cylinder and written down. Leak-down test wherever a reading comes back low. Oil consumption rate measured against manufacturer spec instead of estimated. Valve cover and timing cover seal condition checked and photographed.
Fluid colour, smell and metal content inspected. Solenoid pack and pressure switch checked on live data. Shift quality logged at idle, low load and full load. Pan drop for clutch material where symptoms warrant it, plus CVT belt or dual-clutch wear on cars that have one.
Full fault code read with live data and freeze-frame. Crank and cam sensor signal traces taken on the scope. Mass airflow, throttle position and oxygen sensor readings compared against what the engine should be seeing. Coil and injector waveforms checked under load, then reset and re-tested after any repair.
Coolant level, condition and a pressure test. Engine oil level, colour and contamination. Gear oil and ATF level and condition. Radiator, hoses and water pump checked for weeping, and a combustion-gas test on the head gasket where the symptoms warrant it.
Engine and gearbox mounts checked for collapse and separation. Timing belt or chain wear and the state of the tensioner. Auxiliary belt, idler and tensioner inspection. Alternator, starter and ground points checked, along with driveshaft, propshaft and CV joints where applicable.
Test-drive notes at idle, urban load and expressway cruise. Photos of anything flagged. A plain-English summary rather than workshop jargon, an itemised quote for any repair you want to follow up, and an honest call on rebuild against replace where that applies.
Engines and gearboxes usually give notice. The line sits at whether the car still drives the way it did a month ago, and whether the symptom is getting worse rather than staying put.
If you are in the second column, say so when you book and we will look while the car is already up. What we would not do is drive out a knock or a slip. Both chew through parts that were still good the week before, and that is the point where a repair turns into an overhaul. Our guide on when an engine overhaul is worth it covers where the maths changes.
We open it, measure the clearances, and then tell you whether an overhaul makes sense on that particular engine or whether a good used unit is the wiser spend. The call goes both ways and we have no reason to push it either direction. Nothing gets opened further without you signing it off first.
Parts work the same way. You get told the difference between OEM, OES and quality aftermarket and you choose, and where a verified used part does the job properly we will say so instead of selling you new for the sake of it.
So does who you hand the keys to. The car goes to the technician who will be working on the engine, not to a service advisor, and we keep a note of which engine, which mileage and which repair came before, so the history is already there the next time it comes in.
Ubi, Eunos, Bedok and Paya Lebar are all close enough that the drive in is not the hard part. Send the symptom over on WhatsApp and we will tell you whether it wants looking at this week or at your next service.
Knock, low compression, oil burn and coolant turning up in the oil are the flags. We measure cylinder compression, run a leak-down test and check the oil burn rate against spec before the word overhaul is used at all. Plenty of cars that arrive here described as needing an overhaul turn out to need a head gasket or a valve seal job instead.
Two to three weeks for most cars, and it is not something we rush. A proper overhaul means measuring clearances, replacing the seals and gaskets, and re-machining the head where the measurements say it needs it.
Yes. Conventional automatics, CVTs and dual-clutch boxes are all rebuilt here. Most come back stronger than they went in, because the soft parts, the sensors and the seal pack are all changed while the box is open.
A rebuild keeps your own case and everything still measuring within spec, and swaps out what has worn. A replacement drops in a remanufactured or used unit instead. The rebuild takes one to two weeks longer and keeps your matched parts, which is why we usually put it on the table first.
Gear oil and ATF both break down, and Singapore traffic and humidity push them harder than the schedule assumes. Both get read at every visit for level, condition and any metal being carried around in them, and a clean fluid service at the interval is a large part of why engines and gearboxes here run well past 200,000 km. Intervals by car are in our guide on gearbox oil changes in Singapore.
No. Singapore’s competition regulator, the CCCS, has told authorised dealers to drop warranty terms that force you to service only at their own workshops, so independent engine and gearbox work is fine on a car still under manufacturer warranty, as long as parts of equivalent quality go in and the work is documented properly. We stamp the service book and keep the parts records on file. There is more in our piece on your servicing rights in Singapore.
Yes, and they get checked on every engine or gearbox diagnosis whether or not you came in about them. A worn mount puts a vibration through the cabin that gets mistaken for something far more expensive, so ruling it out early is worth the few minutes it takes.
Belts, at the manufacturer’s interval, which runs from about 90,000 km on some engines to around 170,000 km on others, with a time limit alongside it, so the handbook decides it rather than a rule of thumb. Chains only when they are stretched, noisy or throwing fault codes. We do not replace a chain preventively unless the symptoms call for it.
The conventional engine and transmission side of a hybrid, yes, along with the 12V system. High-voltage batteries and inverters are dealer-level parts and we leave those where they belong.
We stop. The extra damage gets photographed and quoted, then we ring you and you decide whether to carry on. Nothing further happens without your sign-off.
Yes. Some cars cost more to put right than they are worth, and you will get the diagnosis, the repair quote and a frank read on whether selling or scrapping is the better move. We earn nothing either way, so there is no reason for us to dress it up.
Full general servicing at recommended intervals. Plain-English report every visit.
Learn more →A patch on your lot or a level that keeps dropping. We find the source before quoting.
Learn more →Pads and rotors measured in millimetres against the manufacturer minimum, not judged by eye.
Learn more →Knocking over humps, a floaty ride or uneven tyre wear. Checked on the lift and on a road test.
Learn more →Tyre fitting, alignment, balancing and battery load testing. Singapore heat kills batteries fast.
Learn more →Sensors, relays and ECU faults. We trace them end to end with live data.
Learn more →Cooling coils, refrigerant pressure and air handling. Written report every visit.
Learn more →Buying used? You get the verdict before you commit.
Learn more →
What each type of overhaul involves and the point where a used engine becomes the smarter buy.
Which faults are small jobs, which are not, and how to tell them apart before you commit.
The cheap causes, the expensive ones, and how a workshop should tell them apart.
What a collapsed mount feels like from the driver’s seat and when it stops being cosmetic.
What the light is actually saying and which versions of it mean stop driving now.
Whine, clunk and hesitation each point somewhere different. Here is where.
Which one your car has, the interval that matters, and what happens if you miss it.
Why an independent workshop can rebuild your gearbox without touching your warranty.