Hi All, great forum. This is my first post, and unfortunately for me not under very good circumstances
Am hoping some folks on here might be able to give some advice..

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 when in the cabin there is a noticeable whining noise from the engine, only when idling and after first warming up. This sounds to be coming from the rear left side of the engine. Could this be related? Its not a rattle, shall post a video.
Any other advice would be much appreciated..
Thanks

 

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

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

 

To answer your question, I have never heard of anyone with a Cayenne Turbo 955/957/958 having a timing chain issue. Not to say that it might not have happened to someone, somewhere. Just that this would be very low down on the list of possible solutions.

What are the exact engine codes thrown? Please do not provide PXXXX codes from a basic OBD code reader, as they are not really helpful. You will need the codes from either a Durametric or PIWIS diagnostic tool since they are specific to this platform.

Edit: Since the purchase is dependent on this repair and the costs are not out of your pocket, I would not worry about it at this point and let the dealer address it. However, report back their findings so we can determine the plausibility of the repair.

Also, moving this thread to the Cayenne Turbo subforum.

 

Yes I've tried to get the fault code(s) but is becoming difficult, I suppose they dont want me getting involved - which is very difficult for me with it being my car and Ive always done repair work myself on previous cars.
I also tried contacting the Porsche dealer a few times but they are unable to discuss directly with me.
I think Im just going to have to trust the company that sold me the car on this one, and hope they sort a permanant repair..

 

Not sure how hard they are going to be to pry the info from, but I'd want to know what was done to repair it. Just a thought. Hope they fix it up and you are able to enjoy it soon!!

 

At least it sounds like they are going through the proper sources to find the problem and sort it out. If the Porche dealership is fixing it they will probably do everything right and make sure the vehicle is in good order.