I'm having trouble getting the exhaust manifold on my car to seal properly. Can i use dumdum as an exhaust sealant? it says it will cope with up to 200 degrees on the tin. Or am i better off just using some silicone sealant? (I cant get or dont have the proper gaskets)I spent the morning welding up a crack in the exhaust downpipe and then refitted it (using exhaust jointing paste as i cant get the correct gaskets), only to find that the annoying noise was actually from a manifold-head joint or a crack in the manifold (so its coming off again tommorrow).Exhaust jointing paste is horrible stuff and i am sick of chipping the stuff off when i take things apart again so i wanted to use something else.I spent the afternoon refitting the 101 windscreen so have some dumdum about and was wondering if i could use up the tin on my exhaust?

No. And most silicone sealant won't stand exhaust temperatures either. Thereis a good reason why that horrible stuff you refer to is still on themarket - none of the possible 'nicer' alternatives will stand theconditions.JD

OTish - can use use dumdum for sealing exhausts and manifolds?

Nov 04, 2007 21 Replies

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Lizzy Taylor 18 years ago

Yes, but you need one-and-a-half per swivel.

Lizzy

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Tom Woods 18 years ago

I'd rather use ep90 so i can see when it is leaking out!

it just needs a new seal on, and perhaps a bit of chemical metal over the couple of pits on the swivel.

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