The 2.8 V6 as found in the Passat 4motion and Audi's

[Herman Toothrot]

Basically bought a B5.5 V6 Passat 4motion yesterday. It has a full and very comprehensive VW service history and it has the "toothed belts" & water pump replaced receipts. However the question it raised was the owner thought that was the cam belt and that it also had chains when I questioned. However only for the VVT and as far as he was aware they were not a service item as VW had never mentioned them to him, he thought the "big water pump and cambelt" service was the expensive important thing that he had done - the bill was certainly big from VW.

I always thougth the V6's were a cam chain?

Anyone point me to some reading material on the engine or tell what the deal is?

[disco1]

If it answers the question I just had the belts changes on my A4 Cabrio V6. No chains.

[Fourmotion]

My Golf definitely has a chain, and no belt.

[disco1]

If it answers the question I just had the belts changes on my A4 Cabrio V6. No chains.

[Herman Toothrot]

Interesting 50/50 belt or chains.... or is that 33/66?

[Lord Pikey]

I had one of the syncros and it was belts. Seem to remember it being a 400 gbp job with a local indy

Edited by Lord Pikey on Wednesday 20th January 10:10

[Vee]

Check the engine code and check on www.vagcat.com (you'll need to register).

I've had 2 Golf V6 4motions in the past - chain driven

[Dr G]

Passat uses an Audi chassis and Audi's in-line, belt driven V6. The cams are joined by chains but the timing belt is a belt.

Golf uses the VR6 narrow angle motor and timing is by chain.

Tada

[JKY]

Golfs use a transverse narrow angle V6 which bears no relation to the inline V6 in the Passat or Audis.
Passat is cambelt driven with, as DrG says, a small chain linking the pair of cams on each bank.

[Herman Toothrot]

Dr G said:

Passat uses an Audi chassis and Audi's in-line, belt driven V6. The cams are joined by chains but the timing belt is a belt.

Golf uses the VR6 narrow angle motor and timing is by chain.

Tada

Cool, that ties with what the previous owner said.

So are the chains that joins the cams a service item or do they last "forever"?

The engine is silent and lifting on and off the power has no rattles so I wasn't concerned that they are un-touched.

[Dr G]

If you've a nasty rattle on cold starting it might indicate they've stretched but with regular servicing this is unusual.

[Herman Toothrot]

Ok, car appears to have overnight gained an oil leak... Its been on and off the drive since I got it on wednesday and no drips all clean. Parked it up last night and this morning where rain has run under the car I have the rainbow of an oily sheen on the water running from under the car on the passenger side. Its going to be dark and so difficult to investigate when I get home, can someone give me pointers of where to look?

[Dr G]

Cam covers on a 2.8

[Herman Toothrot]

Ok, i'll take a look. They along with the timing chain seals were replaced 30,000miles ago so I did a bit of internet reading and it suggests that the PVC system is normally to fault by blocking up and then causing too high pressure when then causes leaks, remove the blockage the leak stops. I'll take the "pump" off tonight and give it a blast through with some degreaser to make sure its not clogged up.