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In Reply to: Re: Timing chain troubles? posted by Nitram on May 21, 2002 at 10:49:56:
Byron,
Jaguar are now up to their 9th revision on the upper timing chains, the problem normally happens with the Left (drivers side US) of the engine, there is a carbon Pad on top of the chain tensioner (cam timing chains) which comes adrift, we've seen several of them...
Best case scenario, it comes adrift during idle and the driver shuts the engine off immediately, worst case, 80 mph, it wedges between the chain and sprocket...the front of the engine has to come off for timing chain replacements etc etc...approximately $3000,00 worth of work...
Solution, buy two new Timing chain tensioners (latest revision) and install them...
It's hard to re-time everything as the V8 engine has variable timing...hydraulically controled, so it's really a professional Job....
Hope this helps...
Peter.
I have been hearing about alot of these V8 cars with timing chain problems. What exactly is the trouble? Are the tensioners defective? The reason I am asking is, I have a 1998 XJ8 that was in a front end collision and the timing chain cover is broken. While I have the cover off, is their anything I should change or inspect as a preventative measure? Any info would be greatly appreciated. Thanks, Byron
Is it only the upper chain tensioners that have the problem? Should I also change the tensioners on the lower chains? Thanks for the info.
Byron,
yes, only the uppers, especially the left (Drivers's) side.
Peter
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