BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: gmann1340 on 22 October, 2017, 17:38:00

Title: Exhaust sealing
Post by: gmann1340 on 22 October, 2017, 17:38:00
I'm sure it must be on this site somewhere but does anyone know the best way to seal a push in exhaust on my B31? Thanks
Title: Re: Exhaust sealing
Post by: ANDY HIGHAM on 22 October, 2017, 17:47:43
I use clear silicone
Title: Re: Exhaust sealing
Post by: JulianS on 22 October, 2017, 18:03:34
I use PTFE tape and exhaust paste on my A10. Seals well and comes off OK. Have also used PTFE tape and high temperature Loctite 5920 (copper) also works OK.
Title: Re: Exhaust sealing
Post by: Pauldemob on 26 January, 2018, 13:09:41
Is that normal silicone sealant ,bathroom stuff,  will it take the heat and not burn
Title: Re: Exhaust sealing
Post by: Phil C on 26 January, 2018, 14:22:46
Is it necessary? I recently took my exhaust off, no sign of sealant, put it back together without it as well. By the way, couldn't see any purpose in the finned rose at the entrance to the cylinder - it's just held on with a kind of clip, appears to serve no purpose other than look nice. Phil (novice)
Title: Re: Exhaust sealing
Post by: RICHARD MILLS on 26 January, 2018, 15:08:11
I think that the idea of the finned rose is to help to cool the exhaust pipe and minimise discolouration of the pipe. Some people used to wrap copper wire around the pipe instead. Don't know if either method helped at all.
Title: Re: Exhaust sealing
Post by: JulianS on 26 January, 2018, 16:28:39
Sealant needed or not will depend on the individual fit of the exhaust pipe into the head. It cannot be generaised.

The rose also improves appearance
Title: Re: Exhaust sealing
Post by: AWJDThumper on 26 January, 2018, 17:22:59
My engineering view is that the rose serves absolutely no purpose other than cosmetic. My B40 is fitted with a rose but my B40WD is not.
Title: Re: Exhaust sealing
Post by: Mark B on 01 February, 2018, 11:58:32
Standard bathroom silicone sealant has worked for me.