Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Jan Suhr on 11 December 2008, 13:48:27

Title: Vacuum leak in intake manifold Y22XE
Post by: Jan Suhr on 11 December 2008, 13:48:27

I have had for a long time a vacuum leak that I am not able to solve. It is at the back of the intake manifold on the underside somewhere. Spraying with startgas shows that it is there somewhere.

I have changed the manifold gasket twice and the injector o-rings and nothing has made it better. The gasket surfaces looks smooth and clean with nothing that looks like it would leak.

Could the intake have cracks? I have looked for that but nothing that I can find.

This leak makes the idle rough even when it runs on all cylinders ( see my other problem on misfirings)

Is it common that the intake manifold could crack? Or have anyone heard of this kind of leakproblem.


Thanks


Jan

Title: Re: Vacuum leak in intake manifold Y22XE
Post by: Jan Suhr on 18 December 2008, 15:09:26

Bumping this one and hope for some input.


Jan

Title: Re: Vacuum leak in intake manifold Y22XE
Post by: HGV mechanic on 18 December 2008, 21:34:23

never heard of it on miggys, but you could try smearing washing up liquid around the area to help pinpoint :-/

Title: Re: Vacuum leak in intake manifold Y22XE
Post by: Marks DTM Calib on 19 December 2008, 08:22:37

Underneath.....cant think of anything round that area!

Obviously there is the brake servo line, breathers etc....but they are not near the under side of the manifold

Title: Re: Vacuum leak in intake manifold Y22XE
Post by: Jan Suhr on 19 December 2008, 09:03:29

Yes it is strange.

I have sprayed the hoses and connections to the brake booster but that doesn't give any reaction. Only times it revs up from the starting gas is when I spray the back of the manifolds underside. Might be the gasket area around the EGR returnport.

I guess I have to take it appart AGAIN and be really generous with putting some sealer there.

It is annoying because it turns on the MIL and the inspection doesn't approve cars with the MIL on.


Thanks

I'll get back if I find anything.


Jan

Title: Re: Vacuum leak in intake manifold Y22XE
Post by: Marks DTM Calib on 19 December 2008, 09:05:04

AHhh.....the Uk engines do not have EGR.

Does this connect in in this area then as I am surprised it does not exist in the same place as the 2.0's?

Title: Re: Vacuum leak in intake manifold Y22XE
Post by: Jan Suhr on 19 December 2008, 09:12:46

The problem gets less obvious when the engine gets warm so mybe the aluminum expands and tighten it up some. The big difference in temperature in this area might have created some warping in the area around the gasket.

Checking the gasketsurface with a ruler it looks straight though. I am confused.


Jan