Noisey cold start up. 90k miles a6. Rotated after cam chain tensioner replacement on both banks. Definitely addressed the cold start rattle issue after this The 4.2 found in b6/b7 s4's uses a timing chain that has to be replaced at 100k. The older b5 2.8tt motor uses belts that have to be done rought every 50-60k if i'm not mistaken. Both motors have to be pulled to replace these parts. A7 - Timing Chain on A7 - Afternoon Just been told I need a new timing chain on my A7 151 Audi have said this is going to cost €7,486.00 - 700hrs Labour Does this sound about right ? 2nd option needed ? Timing chains/guides are not a problem on the RS4 – the biggest myth is people worrying about the timing chains (and specifically the plastic guides) on this car…that issue is only specific to the B7 S4 engine, and NOT the RS4. While both the S4 and RS4 have V8s of the same size (4.2L), these are entirely different engines. Correct you can not check electronically. But its literally a 10 minute check on ramps. There is an inspection port you pop.off and you can snap a pic. I seen online, as well as reading in threads, that you can view cam phase adaptation value, I believe that's what it is, to understand how your timing chain is. what you should be asking about is if you should replace the timing chain GUIDES. they are made of plastic and often are the likely part to fail. you're at around the point to be kinda worrying, but not quite. i would say shoot for ~100k. but plenty of b6s have made it far beyond that. drive her nice, change the oil a lot and you should be fine. This is VERY bad and at the very least will result in a valve job, if not the destruction of the engine. This is why changing the timing belt is one area of maintenance that should never be skipped or stretched out. Always replace the belt according to the vehicle's maintenance schedule. Audi recommends changing your timing belt every 100,000 Check Details Timing chain audi a6 kit replace upper c6 iwis tensioners. Audi a4 timing chain replacement costTiming consumers tensioners compensation lawsuits 2010 audi a4 timing chain replacement costTiming chain vw tsi audi tensioner gravy lowest stretched ll updated take been another but now has extended 45k totally. cE7EG.