You want to use as little putty as you can get away with, the less putty there is in your mixture the stronger it will be and the less change it will crack.Īnd that’s basically it. The fibreglass is what is going to give the exhaust putty its strength and it is what is going to stop the exhaust putty from cracking. Just enough exhaust putty to bind all the fibreglass together and sticky and flexible enough to stick to the cracked header and to fill in the holes and gaps Keep adding the exhaust cement until you get to…… …this. Start by adding a bit of putty and mix it in Mixing in the putty/cement breaks up the fibreglass even more. I cut the fibreglass into a pile then I add the exhaust putty a bit at a time until it has just enough paste to stick to the header and its flexible enough to fit into the gaps and holes. Cut up the fibreglass until you have something like this If you don’t have fibreglass matting, exhaust wrap should also work, basically any fibres that can withstand high heat.
I have DEI Radiant Matting sitting around so I used that by cutting it up into small pieces. DEI Radiant Matting but any fibreglass material should work Cut off small pieces My top tip to avoid this cracking problem is to mix the exhaust putty with fibreglass before you apply it to the exhaust header. The header gets too hot for the putty in normal day to day driving, the exhaust putty shrinks and then it cracks into small pieces and then it breaks off completely and you are back to square one. Applying the exhaust repair cement directly onto the header does not work for long. In my experience of cracked header repairs, this does not work. He uses the exhaust repair putty directly onto the leaks in the header.
#Soundhack header repair how to#
In the Chris Fix video he shows how to seal up the header. Video can’t be loaded because JavaScript is disabled: How to Find and Repair Exhaust Leaks EASY (Without a Welder) () Great video with great advice but one thing can make the repair MUCH better.
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