Exhaust Coatings

[Frederic Breitwieser]

>Would you have any suggestions about how to coat the *inside* of
>something like an exhaust manifold or pipes? Or would you suggest I
>not even try, & just coat the outside? I'd really like to DIY these
>coatings on a bunch of exhaust parts, but I haven't used this stuff
>before, just read about it.

If you coat the outside, but not the inside, the exhaust will rot from the
inside out, rather than both inside and outside, so what the coating will
do is keep a lot of the heat out of the engine compartment, but rot where
you can't see it.  Applying Jet-Hot (or other product) inside the header is
not that difficult.  You can brush it on, using a brush tied to a metal
rod, or possibly even a small rag wadded into a ball on a stick, much like
a barrel cleaner for a shotgun.  In fact, for 12 bucks, you can purchase a
barrel cleaner rod and shove your own rags through (grab an old t-shirt).

If you are coating headers, with all the bends, it gets more complex.  For
that I'd use a plastic, more flexible rod, and coat from each header inlet
as far as you can go, then stick the rod/rag through the collector outlet
and catch the rest of the tubing that way.

Good luck,


Frederic Breitwieser
Bridgeport, CT 06606

Homebrew Automotive Website:
http://www.xephic.dynip.com/

"When in doubt, use a bigger hammer"
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