View Full Version : Repairing leaky headers?

Adam M
21st May 2002, 17:11
A friend of mine has asked me if its okay to prevent exhaust headers leaking from the sleeve joint by filling them with silicon sealant.

I know sealant seals by definition, but I wasnt sure what to suggest.

Andy Forrest
21st May 2002, 23:23

I wouldn't have thought silicone would survive exhaust temperatures.

Any sort of paste is a bad idea prior to the turbo as a little 'blob' may come dislodged and find itself hitting a 100,000 rpm turbine. Gulp !

I believe sleeved headers are designed to function without any sealer whatsoever.


22nd May 2002, 05:25
You can get a silicone sealant which is good for upto 500 deg C but not sure I'd use it to glue a car! What about Hylomar Blue which is used for gasket sealing?


Danny Fisher
22nd May 2002, 06:24
Adam, think I would go along with Andy on this one. Not a wise idea. Why not give Ian at Haywards a call!

Tim, header temps will get well in excess of 500 deg.


22nd May 2002, 09:01
IMO, Silicon will be a waste of time. Temp issues aside, the whole idea of a "slip joint", is to "slip" ! and it does, by up to 1/2" when the headers get hot.

I doubt silicon would last 10min's.


Adam M
22nd May 2002, 09:40
thanks, thats what I thought.

Andy, those were the exact concerns of my friend.

Danny Fisher
22nd May 2002, 09:52
Adam, all the people that know you. Know that you dont have ANY friends!

Come on tell the truth, your getting just as insaine as that Slooby bloke 'Crack Shot' Tim. http://bbs.22b.com/ubb/biggrin.gif


22nd May 2002, 10:09
I concur with Andy... The headers will reach operating temps af well over 500C, and it doesn't take much in the way of foreign objects in the exhaust stream to destroy a turbo.

Did they try using duct-tape (duck-tape) to sort it? That should do the job... you can fix anything with duct-tape, submarines, noisy hostages, anything! http://bbs.22b.com/ubb/smile.gif http://bbs.22b.com/ubb/wink.gif