Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: damon80 on 23 October 2007, 20:03:51

Title: Hissing Noise from Top of Plenum?
Post by: damon80 on 23 October 2007, 20:03:51

Ho Folks,

When I had the bonnet up yesterday, I noticed that there seems to be a hissing noise coming from the top of the plenum - it sounds like it's coming from underneath the black plastic cover that says "Ecotec".

I've never noticed it before - is it normal?

(It's a 2002 3.2 MV6 manual)

Cheers folks  :y

Title: Re: Hissing Noise from Top of Plenum?
Post by: sounds2k on 23 October 2007, 20:11:52

a certain amount is but if it's a lot, then the seal that fits on the bottom of the breather (plastic part that the ecotec cover clips onto) might be worth checking. along with making sure that the breather is fitted correctly ...

Title: Re: Hissing Noise from Top of Plenum?
Post by: damon80 on 23 October 2007, 20:56:21

How does the ecotec cover come off?  Does it just unclip?

And how does the breather fit on? (just so I can check that it is fitted properly)

Title: Re: Hissing Noise from Top of Plenum?
Post by: Tafty on 23 October 2007, 21:12:47

See Finn's how to :  http://www.omegaowners.com/forum/YaBB.pl?num=1152598350 :y

Title: Re: Hissing Noise from Top of Plenum?
Post by: Dave-C on 24 October 2007, 21:35:54

If you look at the 3 rd piccy in the how to, you'll see a 20 ish mm hole in the centre of the plenum, there is a special washer in there, I'll bet it's that, About a quid each,,,,  Mark DTM gave me one in Newent...  I still owe him a quid for it ;D ;D ;D

Title: Re: Hissing Noise from Top of Plenum?
Post by: Darth Loo-knee on 24 October 2007, 22:09:14

Quote

If you look at the 3 rd piccy in the how to, you'll see a 20 ish mm hole in the centre of the plenum, there is a special washer in there, I'll bet it's that, About a quid each,,,,  Mark DTM gave me one in Newent...  I still owe him a quid for it ;D ;D ;D

 ::)

Title: Re: Hissing Noise from Top of Plenum?
Post by: sounds2k on 24 October 2007, 22:20:40

the special washer is shaped sort of like a top hat ... P/N 90467543 ...

Title: Re: Hissing Noise from Top of Plenum?
Post by: Dave-C on 25 October 2007, 17:28:08

Quote

Quote

If you look at the 3 rd piccy in the how to, you'll see a 20 ish mm hole in the centre of the plenum, there is a special washer in there, I'll bet it's that, About a quid each,,,,  Mark DTM gave me one in Newent...  I still owe him a quid for it ;D ;D ;D

 ::)

Rude boy!!!!

Title: Re: Hissing Noise from Top of Plenum?
Post by: Elite Pete on 25 October 2007, 17:29:59

Quote

If you look at the 3 rd piccy in the how to, you'll see a 20 ish mm hole in the centre of the plenum, there is a special washer in there, I'll bet it's that, About a quid each,,,,  Mark DTM gave me one in Newent...  I still owe him a quid for it ;D ;D ;D

You can't be that good Dave if you have to pay him ::) ;D

Title: Re: Hissing Noise from Top of Plenum?
Post by: JasonH on 25 October 2007, 19:52:15

Mine hisses a bit so I replaced all the gaskets, throttle body, inlet, plenum, etc. Still hisses....

Title: Re: Hissing Noise from Top of Plenum?
Post by: damon80 on 25 October 2007, 21:18:59

Thanks for your feedback folks.
So is it looking like one of those things I just have to live with?  I've not noticed any drop in performance or anything.  And as I mentioned before, I never noticed it before, but happen it's always done it?  :-/