Thought I'd do a guide highlighting which Audi models had a timing chain or Cambelt driven 4.2 V8 for reference. 

All C5 models equipped with the 4.2 V8 excluding allroad is belt driven which is much better to service, and All D2 A8,S8, and D3 A8 up to 2006

The models that use the modified FSI chain driven 4.2 V8 engines are the C5 Allroad (BAS engine code), C6 A6, D3 A8, and A8L starting in 2007, S4, RS4, Q7. 

An engine pull is required to service the timing chain on these FSI units due to the location being at the back of the engine next to the firewall. 

overall the belt driven engines are better serviceable and also have less issues if well maintained. 

The chain driven 4.2 is known for overheating issues and timing chain issues. 

 

Hi Steve, I had a 2004 V8 Allroad, it had cam chains (x4) on the back of the engine, same as the later versions.

the chains had started to rattle, which was why I sold it on after I tried having the tensioners replaced to fix it, made no difference, so as I couldn’t afford the repair, I sold it before it became a bigger issue!

The chains were a £6k job to remove the engine & replace them all.

Edited April 29, 20242 yr by 56Doc

CHAIN ALL DAY LONG       

1 minute ago, audia4b5kev said:

CHAIN ALL DAY LONG       

Most prefer Cambelt lol 

50/50   LIKE     AS LONG AS NOT ONE THEM STUPID ECOBOOST PILES

22 hours ago, audia4b5kev said:

50/50   LIKE     AS LONG AS NOT ONE THEM STUPID ECOBOOST PILES

Too true, what would be worse is an eco boost with a powershift auto gearbox! 

I’d heard of the powershift issues but little about any eco boost engines.

my brother has a fiesta with the 3pot eco boost and they love it.

1 hour ago, 56Doc said:

I’d heard of the powershift issues but little about any eco boost engines.

my brother has a fiesta with the 3pot eco boost and they love it.

My colleague has a fiesta with 40k miles. Engine just gone bang. 

6 hours ago, 56Doc said:

I’d heard of the powershift issues but little about any eco boost engines.

my brother has a fiesta with the 3pot eco boost and they love it.

ECO BOOST ENGINES A  HEAP  OFF  C A  CCC AA

Well, as I said, I don’t know anything about them as I’ve never owned one but they love it.  Very economical, and it seems to have plenty of grunt for such a small engine on the odd occasion I’ve driven it.

 

15 hours ago, 56Doc said:

Well, as I said, I don’t know anything about them as I’ve never owned one but they love it.  Very economical, and it seems to have plenty of grunt for such a small engine on the odd occasion I’ve driven it.

 

Fingers crossed they got a good one 🤞 

They’ve had it about 6 yrs min. I think. Bought from new.

49 minutes ago, 56Doc said:

They’ve had it about 6 yrs min. I think. Bought from new.

Yea my colleague bought hee new it was a 2016 model.