Exhaust sealant / paste ?

Technical advice Q&A

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Durango2k
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#1 Exhaust sealant / paste ?

Post by Durango2k » Wed Aug 03, 2016 8:21 pm

Hi,

Am about to fit the new downpipes. Would you use exhaust sealant (a german brand would be GunGum) between manifold and downpipe ?

Then, SNG did send me three standard length exhaust manifold studs, so I used them - does that work ? The manual says three should be longer, for oil dip stick retaining clip and the gearbox vent pipe retainer.

Carsten
Jag E '66 S1 2+2, 74’Citroen DS 23 Pallas iE, 73’ Citroen SM 3.0, 54’ Citroen 11 BL, 71‘ Velosolex, 88‘ Unimog U1650

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mgcjag
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#2 Re: Exhaust sealant / paste ?

Post by mgcjag » Wed Aug 03, 2016 9:17 pm

Hi Carsten.......do you have the sealing rings that fit between the manifolds and the downpipes.....i didnt use any paste here but on all other joints
Steve
69 S2 2+2 (sold) ..Realm C type replica, 1960 xk150fhc

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abowie
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#3 Re: Exhaust sealant / paste ?

Post by abowie » Wed Aug 03, 2016 9:47 pm

You should only need one long stud for the dipstick holder.

You should always use a sealant between the manifold and the downpipes or you will forever be trying to fix exhaust leaks there. Use lots of it.
Andrew.
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1962 MGB. 1979 MGB.
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

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TrevS
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#4 Re: Exhaust sealant / paste ?

Post by TrevS » Sun Jun 04, 2017 11:04 pm

Hi guys

Sorry to revive an old topic but which brand of exhaust sealant is recommended and how and where should it be applied between the manifold and downpipe? Should I use some on the neck of the downpipe before also fitting the sealing rings? Apologies if stupid question but not used exhaust sealant before

Thanks

Trev
- Trev S -

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mgcjag
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#5 Re: Exhaust sealant / paste ?

Post by mgcjag » Mon Jun 05, 2017 8:29 am

Hi Trevor....use whatever exhaust paste you can get localy....i never used it between the manifolds and downpipes the sealing ring was good enough...however it wont harm useing it....put the ring on....and smear paste where the ring meets the pipe..dont go mad with it, it will just squeeze out every where.. Steve
Steve
69 S2 2+2 (sold) ..Realm C type replica, 1960 xk150fhc

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TrevS
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#6 Re: Exhaust sealant / paste ?

Post by TrevS » Mon Jun 05, 2017 8:41 am

mgcjag wrote:Hi Trevor....use whatever exhaust paste you can get localy....i never used it between the manifolds and downpipes the sealing ring was good enough...however it wont harm useing it....put the ring on....and smear paste where the ring meets the pipe..dont go mad with it, it will just squeeze out every where.. Steve
Perfect, will do this. Cheers Steve
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