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General => The garage => Topic started by: dkw on 21 February 2011, 21:46

Title: Fitting a stainless exhaust
Post by: dkw on 21 February 2011, 21:46
The last time I fitted an exhaust everyone was using jointing paste (yep i'm old), but I know my mates who work in the exhaust place on the high street use clear silicone. What's the best thing to use when fitting a stainless system?
Title: Re: Fitting a stainless exhaust
Post by: Wayne on 21 February 2011, 23:39
Exhaust paste, why would you use silicone, that is nuts.
Title: Re: Fitting a stainless exhaust
Post by: AudiA8Quattro on 21 February 2011, 23:56
Do people not use paste anymore? why?
Title: Re: Fitting a stainless exhaust
Post by: Wayne on 22 February 2011, 00:02
Quote from: AudiA8Quattro on 21 February 2011, 23:56
Do people not use paste anymore? why?

Have also seen stainless systems fitted without paste as they seal when they warm up or so I was told.
Title: Re: Fitting a stainless exhaust
Post by: Khare on 22 February 2011, 00:07
Quote from: Wayne on 22 February 2011, 00:02
Quote from: AudiA8Quattro on 21 February 2011, 23:56
Do people not use paste anymore? why?

Have also seen stainless systems fitted without paste as they seal when they warm up or so I was told.

+1.

I don't run any paste on my stainless system, and it doesn't blow  :smiley:

Found this on matey matey though.

Quote
Once the old exhaust is off the car you should offer the new system up and bolt it loosely in place. Apply regular exhaust assembly paste to any joints if fitting a mild steel exhaust but use clear silicone sealant on stainless exhausts. It may sound odd but the regular assembly paste does not stick to shiny stainless steel.
Title: Re: Fitting a stainless exhaust
Post by: Wayne on 22 February 2011, 00:10
Interesting info with silicone and stainless systems then  :smiley:
Title: Re: Fitting a stainless exhaust
Post by: sharki786 on 22 February 2011, 13:29
sooo true wayne! this guy that does stainless steel uses clean silicone and has never had any probs. he said that the prob with the exhaust putty is that after a while it starts to get brittle and fall apart. obviously the silicone will need to withstand certain temps
Title: Re: Fitting a stainless exhaust
Post by: Khare on 22 February 2011, 14:31
Why use silicone at all though?

If the exhaust is of good quality and it's fitted properly it causes no problems. Mine has no putty or silicone and it doesn't blow at all.
Title: Re: Fitting a stainless exhaust
Post by: AudiA8Quattro on 22 February 2011, 18:26
Quote from: Khare on 22 February 2011, 14:31
Why use silicone at all though?

If the exhaust is of good quality and it's fitted properly it causes no problems. Mine has no putty or silicone and it doesn't blow at all.

If you are fitting one pipe over another, its difficult to get 100% gas seal.
Flange fitting exhausts are much better  :grin: