Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: TECHNOPUG on 25 February 2010, 15:57:45

Title: Exhaust manifolds
Post by: TECHNOPUG on 25 February 2010, 15:57:45
As per a previous thread, it looks like my exhaust manifolds (well, at least one anyway) need replacing. Do these need to be OE Genuine Vauxhall stealers parts? I've seem them on Buypartsby for about £6 each. Any other suggestions?

  Also, is this worth attempting myself or will I enter a whole world of pain containing seized/rounded nuts, broken studs and stripped threads?
Title: Re: Exhaust manifolds
Post by: ScottieMV6 on 25 February 2010, 16:10:53
Manifolds or gaskets? £6 very cheap for manifolds!!

I believe it is Vx only recommended and only the multilayer metal gaskets. This is what I have just used on mine.

I may be wrong though. ::)
Title: Re: Exhaust manifolds
Post by: TECHNOPUG on 25 February 2010, 16:13:17
Manifold gaskets - my bad!
Title: Re: Exhaust manifolds
Post by: TECHNOPUG on 25 February 2010, 16:14:04
Quote
Manifolds or gaskets? £6 very cheap for manifolds!!

I believe it is Vx only recommended and only the multilayer metal gaskets. This is what I have just used on mine.

I may be wrong though. ::)

How much did they set you back from the stealers Scottie? And did you fit them yourselves?
Title: Re: Exhaust manifolds
Post by: ScottieMV6 on 25 February 2010, 16:18:26
I got them from a member on here. I did them myself but I had the heads off the car to do the head gasket so was very easy.

Plenty of plus gas on the nuts and studs will help you not to snap them :y
Title: Re: Exhaust manifolds
Post by: Elite Pete on 25 February 2010, 16:27:39
I think they are about £8 plus the dreaded from a dealer so not to bad. IIRC on the early V6 the manifold to down pipe is held together by bolts and not studs with nuts so lots of plusgas from above. Driverside isn't too bad to do passenger side is a nightmare :(
Title: Re: Exhaust manifolds
Post by: TECHNOPUG on 25 February 2010, 16:30:59
Does the downpipe need to be removed or is there enough play to get the manifold off with it still attached.

  I'm certain that it's the drivers-side that has gone, thankfully. I've already changed the cam-cover gaskets on the passenger side and I really don't want to venture there again!
Title: Re: Exhaust manifolds
Post by: Elite Pete on 25 February 2010, 16:35:06
Quote
Does the downpipe need to be removed or is there enough play to get the manifold off with it still attached.

  I'm certain that it's the drivers-side that has gone, thankfully. I've already changed the cam-cover gaskets on the passenger side and I really don't want to venture there again!
You don't have to remove the down pipe but you might have to undo the lamba sensor electrical connection so the wire doesn't stretch with the down pipe hanging  ;)
Title: Re: Exhaust manifolds
Post by: Elite Pete on 25 February 2010, 16:36:38
Or do you mean to get the gasket inbetween the manifold and head without removing the manifold from the down pipe.
Title: Re: Exhaust manifolds
Post by: TECHNOPUG on 25 February 2010, 16:40:32
The former.

It's one of those jobs that seems easy enough to do and I kinda begrudge paying all the labour when the parts are a tenner. However, it's the hassle of broken studs, stripped threads etc which is putting me off.
Title: Re: Exhaust manifolds
Post by: TECHNOPUG on 25 February 2010, 16:43:14
Actually no, the latter (this is what happens when you try and post whilst answering the phone with 3 screens open!).

Does the downpipe need to be seperated from the manifold in order to remove the manifold from the head and replace the gasket? Or is there enough play in the system to allow the downpipe to stay connect and move the manifold past the exhausts studs?
Title: Re: Exhaust manifolds
Post by: ScottieMV6 on 25 February 2010, 16:58:18
Quote
I think they are about £8 plus the dreaded from a dealer so not to bad. IIRC on the early V6 the manifold to down pipe is held together by bolts and not studs with nuts so lots of plusgas from above. Driverside isn't too bad to do passenger side is a nightmare :(

Didn't realise they were that cheap from the stealer :y
Title: Re: Exhaust manifolds
Post by: TheBoy on 25 February 2010, 17:09:44
You do need to use genuine MLS gaskets. Cheaper pattern ones are more prone to premature failure.  They aren't expensive.