timing tensioners on xk8
Discussion
BigNige said:
If it rattles then it needed doing yesterday.
I've not experienced this issue as my own car is post that problem (just) but from what I can gather, if it rattles then get it changed pronto!
I've heard figures of about £400 to change inc labour?
If it's rattling you may just have enough time to turn it off before it goes bang. Often, it doesn't rattle at all...I've not experienced this issue as my own car is post that problem (just) but from what I can gather, if it rattles then get it changed pronto!
I've heard figures of about £400 to change inc labour?
£400 sounds amazing. £1000 - £1500 is more realistic.
Check you history for a receipt showing an upgrade to phase 3 tensioners. If it's been upgraded to phase 2 then they will still need changing ASAP. If you're not sure then get you friendly local specialist to check - they'll probably charge to do so, so agree a price to do the work if required with them beforehand.
Hope that helps.
I was charged 1 hours labout to check what it had, and then £400 (including the one hour labour) to actually have them changed to metal ones. FWIW the phase 1 tensioners on my '98 95k mile XJR were fine, so it is possible for them to be OK (I wouldn't take the risk though)
£1500 might be what it would cost if they fail (if you were lucky and could find someone cheap)
£1500 might be what it would cost if they fail (if you were lucky and could find someone cheap)
nev996 said:
how will i know if mine needs doing and does anyone know at what cost?????
if this is a wide problem why dont jaguar foot the bill as its obviously a bad design isnt it!!!
Had mine done by Tom Lenthal (based in Hampshire, Tel: 0118 973 7779)in March 2009. Cost was approx 900 pounds. You wont know whether you need to change them until they break & then you need a new engine.Jaguar eventually recognised the problem & the third generation tensioners (made of metal)are now installed. First generation was made of plastic.if this is a wide problem why dont jaguar foot the bill as its obviously a bad design isnt it!!!
Worth paying to have the cam covers off and check the top tensioners. The kit itself is around £4/500.Then the labour addition. I have heard other tales of just the top tensioners being changed not the whole kit.False economy.
The lower blade guides crack across their face and their tensioners crack also.Be careful in making sure a specialist carries out the job.
The lower pulley bolt needs to be torqued up to 363nms( this too needs replacement) , otherwise the pulley will drop off. It is only secured by a split collar within the pulley/damper and relies on grip to secure it to the crank.
The lower blade guides crack across their face and their tensioners crack also.Be careful in making sure a specialist carries out the job.
The lower pulley bolt needs to be torqued up to 363nms( this too needs replacement) , otherwise the pulley will drop off. It is only secured by a split collar within the pulley/damper and relies on grip to secure it to the crank.
I`m amazed !How strange some people are. You are so wrong with this approach .You should have changed all the faulty parts. The lower blades in your car will be broken as will the tensioners. I don`t understand the mentality of cost cutting on a known problem , would you apply it in your own proffession?, I doubt that.
ajmac said:
I replaced my secondary tensioners back in 05, cost £100 for the parts. Look at my profile for a photo of the tensioners that I took out.... and yes they did rattle on startup :-)
Alastair
We just did the upper tensioners on two or three cars, when they were like that. But when each of those cars broke there 2ndry chains about 6000 miles later, we realised you cant just do that. Alastair
Edited by ajmac on Tuesday 8th September 18:34
Something about being metal on metal, even though there was no visible damage, weakens the chain. Even if your going to leave the bottoms ones (debate if thats a good idea or not) you should always do the chains with the upper tensioners.
Fingers crossed for you, but I'd be sweating.
thomson said:
Sounds like mine need doing also. Can anyone recommend a good Jag indy up in Scotland? Am in Tayside, or would I be better biting the bullet and go to local Stratstone main dealer in Perth?
Noooooooooo.......Not Perth...Been there done it with T shirts and everything. Absolutely f
kin shocking. The whole place should be strapped up and towed into the sea...s......AnyhooTake your time and hunt down a local mechy. It will be worth it.
It's a gamble, if the primary or secondary chain goes, then is does, bad luck on my part, I'll enjoy rebuilding a second hand power unit. In our profession these kind of gambles are a day to day occurrence, in the industry it is a decision based on: risk, against cost and inconvenience. In my case I don't do many miles (20k in five years) and as I don't need to get it fixed in any time frame (as it is a second car now) the inconvenience is negligible. I have the latest parts for Primary and secondary tensioners with chains, and a machinist friend is knocking up the crank locking pin, cam locking bars and a couple of pullers for me at the moment. It's a job for next summer.
If this were my only car and I didn’t adore rebuilding engines I too would have had the entire timing system upgraded the latest spec soonest.
If this were my only car and I didn’t adore rebuilding engines I too would have had the entire timing system upgraded the latest spec soonest.
Edited by ajmac on Friday 11th September 21:12
Thats for the response ajmac, very interesting. How industries and opinions differ. If I adopted your approach, which I can see is something you have to deal with daily-I would be singled as cutting corners! . Our reputation would suffer.The public are a difficult group to understand and satisfy, compared to corporations . Funny old world.
Cheers
Cheers
You would be amazed at the corporate decisions that get made, a couple of months ago I was offshore Nigeria with an engine that showed signs of self destruction within the next 500 hrs resulting in a £900,000 repair bill. We could have taken action and repaired for £150k, but they wouldn't disrupt production! It will be done in their annual maintenance month in 2010....
Others will be risk averse and shutdown immediately and wait for a team to execute the repair.
We have some customers (admittedly a minority) that refuse even to change the oil and filters, their view is that they start the engine run it until is self destructs and install a replacement, their economics show it is the cheapest way.... for them.
On the XK8 front it's rather expensive when your 5HP24 throws its hand in with the forward clutch pack problem on early production units.
Others will be risk averse and shutdown immediately and wait for a team to execute the repair.
We have some customers (admittedly a minority) that refuse even to change the oil and filters, their view is that they start the engine run it until is self destructs and install a replacement, their economics show it is the cheapest way.... for them.
On the XK8 front it's rather expensive when your 5HP24 throws its hand in with the forward clutch pack problem on early production units.
Edited by ajmac on Saturday 12th September 08:48
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