GRA

Ive just had some bad news regarding my recently purchased 957 TT. Before buying the car it had a engine management light, I agreed a price on the car on the basis that this and a few other cosmetic issues were first repaired. On collection of the car driving it off the forecourt I noticed the light was still there, I immediately told the garage but because it was a public holiday the workshop was closed, so was told they would sort it the following week if I return the car.
They have had the car over a week now, initially they apparently fitted a new crank timing sensor which didnt fix the problem, then sent the car to an independant VAG/Porsche specialist and was told the problem could be one of two things but they were not sure which it would be. On that basis they then sent to to a Porsche dealer, and now yesterday they have reported that the problem is the timing chain!

Whatever the fault is, the dealer should be arranging for the repair and paying the costs as the purchase was agreed on the basis that the engine light was sorted.
But I do have some questions and welcome any advice anyone has on this.
Is the timing chain a common fault?
Im guessing its a big job to repair?
If it has stretched, are there any other parts that may break in the future as a consequence? I have 3 months warranty with the car, so dont want it to be 'patched up' to find something else needs replacing in the future because of this problem.

I did notice the engine was running very slightly lumpy on idle, but this was not obvious and I put it down to being a 100k mile V8 engine.
Also I posted recently that you can hear in the cabin a noticeable whining noise from the engine, only on idle when warm, which sounded to be coming from the rear left side if the engine. Could this be related? Its not a rattle, shall repost the video.
Any other advise would be much appreciated..
Thanks

GRA

http://vid258.photobucket.com/albums/hh256/graham22k/Mobile%20Uploads/cttnoise_001_zpscadbaed0.mp4

Heres the video, its more of a humming sound..

jpru2001

I think you'd get better advice about common issues if you could post the error code you are getting on the check engine light...

TomF

Sorry to hear of your troubles. I agree with the poster above that it would be helpful to post the error codes you are getting. The shop should be able to provide them.

As for the humming, it is nearly impossible to tell from a recording. It could be anything. Over the years, I have learned that each of the Cayenne models have unique noises of their own, and to diagnose a noise, you have to have a full understanding of the baseline first.

Cheers,
TomF

GRA

I'll try to get the info but might be difficult

GRA

Ok thanks Tom, shall see what info they give me. Im very interested to hear of anyone else with timing chain issues it seems very uncommon