Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Webby the Bear on 16 March 2014, 13:20:19

Title: Exhaust back fire question...
Post by: Webby the Bear on 16 March 2014, 13:20:19
Hi guys,

After fitting my new exhaust (cat back) when decelerating I get what feels like the exhaust tapping the bottom of the car. I've read a bit and found out that this is back pressure and in other words a ''back fire''.

Bearing in mind I've only just fitted it is this caused by a slight exhaust leak at the cat to centre silencer join? That's where it feels like it is. I didn't have any exhaust paste so I fitted it dry and it all runs really nice and quiet except a very slight leak on start up. I assume once it heats up it expands and stops the leak cos if I stand outside the car with it running when its warm theres no sound of a leak at all.

cheers guys :)
Title: Re: Exhaust back fire question...
Post by: Webby the Bear on 17 March 2014, 06:50:28
Anyone? lol  :)
Title: Re: Exhaust back fire question...
Post by: terry paget on 17 March 2014, 07:34:53
I use Loctite 5920 high temperature silicone sealant to join down pipe to central section. Halfords sell it, a tube is about £6, and it will do about 12 seals.Vx do not do a gasket for it.
Title: Re: Exhaust back fire question...
Post by: Webby the Bear on 17 March 2014, 07:50:44
I use Loctite 5920 high temperature silicone sealant to join down pipe to central section. Halfords sell it, a tube is about £6, and it will do about 12 seals.Vx do not do a gasket for it.

Awesome, thanks Terry. I normally get a decent discount on stuff like that with my trade card so that would be pefect :)
Title: Re: Exhaust back fire question...
Post by: 05omegav6 on 17 March 2014, 09:48:06
Did you clean the joints before fitting :-\

A good wire brush and a smear of assembly paste should be all that's required :y
Title: Re: Exhaust back fire question...
Post by: Webby the Bear on 17 March 2014, 11:22:28
Hi Al,

I gave them a bit of a brush up with the wire brush but i didnt go overboard. I'll undo them all, wire brush and apply a bit of paste :)
Title: Re: Exhaust back fire question...
Post by: 05omegav6 on 17 March 2014, 11:26:06
Arguably a good quality new exhaust shouldn't need paste, but second hand a smear is well advised :y
Title: Re: Exhaust back fire question...
Post by: Webby the Bear on 17 March 2014, 12:17:43
Cheers Al  :y :y :y