Hi, I'm new here. I've got a 1998 Audi A6 2.8L. 154000 miles on it... I was driving it in a 25mph zone and it quit running on me. Towed it home and took off the timing covers, the belt has partially slipped off on the passenger side and there are 4 teeth gone on the driver's side.
Do you think the valves ect are still okay? The motor still turns over with the starter, just won't fire. I'm hoping I can get by with replacing just the belt, tensioners, and pulleys.
Thanks for any help ahead of time.

 

looks like bad news..high chance of bent valves and poss. damage to the pistons etc. Haven't had one yet that was ok after it chucked a belt.

 

Gotta agree - if it ate four teeth and the cam moved that much, you are probably looking at bad news.

 

My 97 did the same thing and I ended up getting both heads redone with 6 valves on the passenger side because they were bent...

 

I had a 2.8 which suddenly died. Same problem, the tensioner bearing had failed and the belt had slipped. I bought all of the parts, T Belt, water pump, valves, guide seals etc., pulled the head and there was not a single bent valve. Had I known better I would have just done the T-belt and tensioner first and then seen if it would start and check compression before pulling the head. I recommend you do that first. Good Luck.

 

Sometimes you get lucky, the planets all align and you don't end up with bent valves. From what I recall, the bent vs not bent after belt failure was about 80/20.

 

Even if the odds are against you the cost savings for not pulling the heads is quite large. Once the heads are off you have to replace the head bolts and the gasket set. Those two items alone will set you back a few hundred. Also, it is possible that only one side has bent valves. If you decide to go this route, once the T-belt is on, turn the engine over by hand with no spark plugs installed. If you feel anything hitting stop immediately and plan on pulling the heads. If the engine turns over freely then you can test the compression in each cylinder.

 

Thank you all for the replies. I'm going to plan on replacing the belt and tensioner, turning the engine over by hand and if it feels good, checking the compression as ManyAudis suggested. I can always buy valves and gaskets ect after that if I gotta.

 

I hope the best for you. Another thing you can try before installing the belt twice if you do have damage is pull the valve cover / covers and look for valves tips that aren't contacting the camshaft. you can spin the cam little by little as well while easing the crank around to get full revolutions out of both and youll see if you have a problem for sure. I wouldn't suggest this unless the timing was already out like it sounds like its going to be. Good luck