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Quick Exhaust Leak Repair


TexasPthFnder95
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I have a small exhaust leak on my drivers side manifold i have already replaced the passengers side manifold but dont feel like removing everything for this one. Is there anything i can use to seal and stand up to the heat at least for a little while anyways?? And note this is a very small exhaust leak...

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JB Weld runs off at only a few hundred degrees. It will not withstand exhaust temperatures.

 

You cannot fix an exhaust manifold leak, if it's at the head, unless you replace the broken studs and gasket or tighten the nuts if they're loose. Always replace the gasket whenever you remove a manifold. You can use super ultra copper RTV on the new gaskets to create a much better seal, but it only works if it's in between the head/gasket/manifold. Putting it on the outside won't do anything. There needs to be at least one stud holding the flange on per port, and then you can use a ton of the RTV to seal the rest.

 

Small leaks at the manifold don't hurt anything, they're just annoying as hell.

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  • 3 weeks later...

I have a broken stud and the sound was BAD! I used the super copper and it worked really good and turned my check engine light off. What I did was put a decent bead on the head, put the gasket and th manifold and bolted them up to where I ran out just a tiny bit, let it set for about 8 hours and tightened it up all the way. Its been about a month and I've had no problems with it.

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