[V6-12v] 90Q V6 oil leak question

[James4ihl at aol.com]

The oil leak you're describing is probably coming from an oval shaped seal 
that does indeed lie in between the V, underneath the intake manifold.

It's a bugger of a job to get the intake manifold components off and on, in 
order to replace one £3 seal! However, while you're in there, you may as well 
replace the... I can't remember the exact term, but there is an oil pressure 
release valve under there which can only be accessed by removing that cover, and 
can eventually cause noisy tappets all round, so while you're in there...

One important thing to note is that because the intake manifold is secured 
downward at an angle to the cylinder head, the manual stresses that whenever you 
have slackened off the intake manifold bolts, you must re-tighten the 
cylinder head bolts a quarter turn.

As I remember, removing all the intake manifold is one of the major bits of 
work to be done when replacing the cylinder head gaskets too, and since you 
have to open the rocker gaskets to re-tighten the cylinder head bolts, it may be 
worth considering going the whole hog and doing a cylinder head gasket while 
you're taking it all apart... As long as you have the cam angle and crank pin 
tools, that is...

Good luck!
James

Remember to replace all the gaskets for the intake manifold components while 
you're taking it apart and all the rubber O-rings for the injectors. 
In a message dated 13/3/04 6:05:48 pm, apowell at gocougs.wsu.edu writes:


> I'm a long-time Quattro lister but due to selling my 1990 200 and getting a
> 93 90Q V-6 5-speed, I've joined this list as well. One of the listers
> suggested I send the post below -Originally sent to the Q-list) to this
> group for suggestions and hints on how to proceed.  Any help is appreciated!
> 
> **************************
> 
> Hey friends, I'm about ready to embark on my first mechanical adventure with
> my wife's new toy, a 1993 90Q.  VERY nice car, and she's loving the V6-5
> speed combination.
> 
> However, it's leaking oil like a fiend and it appears to be coming from the
> valley pan under the intake manifold. I'm going to try to pinpoint the leak
> as well as possible, but it's really buried.  I expect to have to pull the
> intake manifold to get at the source.
> 
> Any comments or BTDT's? On a 'Murrican V-8 this would be easy, but I'm
> always concerned about hidden gotchas on Audis.