Quote Originally Posted by 312chi View Post
If my timing chain starts to stretch is it a good idea to replace it for $800? I am getting the TSB oil process done (Replacing pistons) and the service tech is advising that i replace the timing chain now since its starting to stretch.

I always thought timing chains never had to be replaced and i'm concerned that if anything does go wrong with the engine, they can say its not their fault b/c i didn't opt to change the chain.

Should i replace it? Also, i read somewhere that its normal for chains to stretch and that the tensionor counteracts stretching.
If they are performing a stage 2 for oil consumption, the primary chain needs to come off. Your engine has 2 main chains; one for the cams and one for the balancers/water pump. They go for about $150 ea. There is a third one that runs the oil pump. You absolutely will want to replace the primary chain tensionner if anything!!! As the early builds start getting into the higher mileage, I can see Audi having another mess on their hands; that part is not designed to last. Anyway, $800 is extremely steep for a part that gets removed and replaced regardless of weather it gets renewed. If they change the associated guides, tensionners and hardware, then it's a good investment if you plan on keeping the car.