A rattle from the front of the engine for the first few seconds after a cold start, and somebody has told you it’s the timing chain. If that’s where you are, you’ve probably also been handed a number with four figures in it, and you may be bracing for a bill your engine doesn’t actually need.
We’re an independent workshop on the Medway City Estate in Rochester. Faversham drivers either drive the car over to us or we bring it in on our own truck. The work happens here, in the workshop, and the first thing we do is find out what your engine has in it before anyone talks about money.
Before anything else, your engine has to be identified, because a good share of the cars we see with a suspected chain rattle don’t have a chain at all.
A chain runs in engine oil by design and wears slowly rather than failing on a date. Overnight the oil drains back and the tensioner isn’t pressurised, so a worn chain has slack in it and slaps against its guides until oil pressure takes it up a few seconds after start-up. That’s the classic cold rattle. As the chain stretches further, the camshafts drift out of step with the crankshaft, the ECU sees the mismatch and stores a correlation code.
A wet belt is different. It’s a rubber cambelt that also runs in oil, which is exactly why the two get confused. As it ages it sheds material into the sump, and that debris finds its way to the oil pickup and blocks it, so the engine starves itself of oil pressure. Mistake one for the other and you’ve got the wrong job, the wrong cost and, in the case of a belt, far less time than you think.
These are what people describe to us on the phone:
Not one of those points at the chain on its own. A cam sensor, its wiring, an oil pressure fault or a fuelling problem can all produce the same noises and the same warning light, and we’re not going to quote a strip-down off the back of a code somebody read out in a car park.
The diagnostic is £69. We read what’s stored and what’s pending, look at the freeze-frame the ECU captured at the moment the fault set, watch the cam and crank signals live while the engine runs, and check the oil for the gritty debris that gives a failing wet belt away. Then you’re told which of the two jobs you’re facing, and why.
It’s honest to say it’s a big one. The front of the engine has to come apart to reach the timing case, ancillaries come off to get at it, and on plenty of engines the sump comes off as well. That’s where the cost sits: almost all of it is the work of reaching the chain, not the chain itself.
Nothing is started without your approval. You get the figure and a breakdown of what it covers before a spanner goes near it, and if you want a day to think about it the car sits as it is. When the job’s done the timing is verified, the codes are cleared and rechecked to make sure they stay clear, and the car goes out on the road before it comes back to you. How long it’s off the road depends on the engine, and we’ll tell you that with the quote rather than guess at it here.
The chain is replaced as a set with its guides and tensioners rather than on its own. Guides are plastic and they wear against a chain that’s already stretched, so putting a new chain against old guides is asking to do the whole job twice, and the second time you pay the labour again.
The oil and filter go in as part of it too. Debris in the oil is usually why the job is needed in the first place, and there’s no sense in circulating it through new parts. If anything else has been damaged by a stretched chain or a blocked pickup, you’ll be told before it’s dealt with, not after.
The £69 is the only price we can honestly publish here, and it’s the one that comes first.
A timing chain job isn’t one job. It differs by engine, by whether the chain also drives the oil pump, by how much has to come off or out to reach the timing case, and by what’s already been damaged by debris or by a chain that’s been rattling for months. A single number on a page would be a number for somebody else’s car, and you’d find that out on the day.
What the £69 buys you is the identification and an itemised quote for the actual work, with no hidden extras in it. The diagnostic fee is usually credited against the repair when the work is booked in with us, though on smaller jobs it isn’t automatic. We decide that case by case and tell you which it is before you commit to anything.
You’ll find mobile mechanics advertised for this. A timing chain isn’t a job for a driveway: the engine has to come apart, the car needs to be held while it’s in pieces, and the timing has to be set against the marks and then proved before the engine is run. It’s a clear no from us, with a reason, rather than a booking we’d regret taking.
You also speak to the team here directly, not a call centre and not a booking platform generating a figure on somebody’s behalf. The person who quotes you is at the workshop that does the work, and everything gets explained in plain words.
All makes are taken, petrol, diesel, hybrid and electric, including older high-mileage cars a main dealer would rather not have in. A car old enough to need a chain is a normal day here.
The workshop is on the Medway City Estate in Rochester, just off the A289. From Faversham it’s the M2 west, off at the Medway turn and onto the A289 over the bridge, which is a straightforward run for anyone who can drive the car.
If it won’t turn a wheel, that’s not a problem either. We have our own recovery truck, equipment we own rather than a service we arrange through somebody else, and we’ll bring in a car that won’t start, one that’s stuck in limp mode, or one that’s been sitting on a drive for months because nobody could give a straight answer about it.
Faversham drivers come to us the same way drivers do from Sittingbourne and Canterbury along the same road, and from Rochester, Strood, Chatham, Gillingham, Rainham and Gravesend closer to home.
Usually, yes. A chain wears rather than snapping out of nowhere, and the warning is normally noise first: a rattle for a second or two on cold start that quietens as oil pressure builds. Later it stops quietening, and later still the engine light comes on with timing codes stored. The cars that give no warning tend to be the ones where the noise was heard for months and put down to something else. If yours is rattling now, it's worth knowing which way it's going before it decides for you.
You can't tell by ear, and plenty of people have been told the wrong one. It comes down to the exact engine in your car, and that's identified from the vehicle itself rather than from the model name, because the same badge on the back can have either. Ford's 1.0 EcoBoost and the PSA 1.2 PureTech both run a belt in oil, for instance. We confirm it as part of the £69 diagnostic, along with a look at the oil for the debris a failing wet belt leaves behind.
Not sensibly. The front of the engine has to come apart, ancillaries and often the sump have to come off, the car needs to be secure and raised while all that is out, and the timing has to be set and then verified before the engine runs again. That's workshop work with the right tooling. A mobile visit can read a fault code on your drive, but it can't do this job, whatever the marketplace listings suggest.
Yes. We run our own recovery truck, so a car that won't start, sits in limp mode or hasn't moved in months gets brought to the workshop on our own equipment rather than through a third party. Tell us where it's parked and how it's sitting when you get in touch, and we'll sort the collection from there.
No. Older cars are a good part of what comes through the doors, including ones a main dealer would rather turn away. What matters isn't the age, it's whether the rest of the engine is worth the labour of reaching the chain, and that's part of what the diagnosis tells you. If the honest answer is that the car isn't worth the repair, we'll say so before you spend anything on it.
Usually it's credited against the repair when you book the work in with us, but it isn't automatic on smaller jobs. It's judged case by case and made clear to you before you agree to anything, so you'll never find out about it after the fact.
Phone: 01634 510 780
Email: bookings@medwayvehicleservices.
co.uk
Unit 3 Cliffe Yard, Anthonys Way, Medway City Estate, Rochester, Kent, ME2 4DY
