Sia Bani

Not the same 4.2. Belt driven vs chain

scfan

I own both cars; no belt on the cams in my allroad. Hence why the allroad doesn't have the lengthened front end like the C5 A6 4.2 and S6. It was the only C5 A6 chassis car to get the newer 4.2.

Sia Bani

Hmm, interesting. I didn't remember. Well, that's good to hear then.

S4iowa

And IIRC the early C6 A6 also got a chain drive 4.2

Ivan22

My S4 went in for friction like rattling noise at front end of the motor. First assumptions were a broken radiator fan, or a belt pulley, or perhaps wishful thinking. Mechanic got the front end off, meaning bumper, headlights, radiator, etc.

But if he is trouble shooting front of the engine noise, and according to your picture, the chain is in the rear, any idea what it could be?

Thanks.

troyegly

Mine went out 5k past the warranty! Not a cheap job at all. At some point it will need to be done.

nitro1

This is why you have an aftermkt warranty. At 100k I will renew mine....WORTH EVERY PENNY! Agreed with the earlier post. This is one of those things (assuming you have a warranty) you drive until it breaks.