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notmrgoodwrench 09-02-2002 11:43 AM

can you paint exhaust manifolds?
hey guys me again i have another ? i have tried with no luck in the past to paint exhaust manifolds i used high heat paint but it came right back off so does anyone know if they make a paint that will hold up to all the heat of rxhaust manifolds. thanks for the help

4 Jaw Chuck 09-02-2002 12:35 PM

Aluminum plasma spray is the only thing I have found that works for any length of time. Zircionia plasma spray works good too, the beauty is you can wash with CLR after to bring back the shine.

notmrgoodwrench 09-02-2002 01:28 PM

thanks 4jaw... i just built this motor and it looks great dont wanna ruin the looks with ugly manifolds so thanks again and ill try that

notmrgoodwrench 09-02-2002 01:32 PM

oh by the way where can you find that stuff cause i have never heard of it

hotrodit 09-02-2002 03:57 PM

Vitreous enamel the same as Jaguar used on their manifolds years ago, check out an XKE! has to be done by a specialist though & i know you can still get done here in the UK. Maybe try a search on the net, just another option. :)

4 Jaw Chuck 09-02-2002 06:41 PM

Plasma spray can best be described by this link.

Most large machine shops with extensive welding facilities do plasma spraying, The aluminum spray looks nice and is easily cleaned with CLR or other acid based cleaner. Make sure they put on a nice heavy coat and have them preheat your castings for optimum adhesion. It is basically a sacrificial coating and will corrode first before the parent metal. Cast iron manifolds look great afterward and I use this for headers too. 09-02-2002 06:45 PM

I wouldn't consider building an engine without having my headers coated with the Jet Hot (other companies out there do it too, check ads in rod magazines) metallic-ceramic coating. It is as near a permanent fix as you will find. My Willys headers are 7 years old with fairly steady service and look as good as the day they came back. For all the pipes back from the headers, powder coating, any color you want, works great. Won't burn or flake off.

4 Jaw Chuck 09-03-2002 08:18 AM

I agree Jet Hot is the best but expensive to have a cast iron manifold done. The best part is like Willy says it does not discolor at all.

Madd Syntst 09-03-2002 11:42 AM

This si not as high dollar, but I have had good results with an Eastwood Stainless High Heat coating mix. I put the manifolds in the oven (that pst her off) and got them hot. Then used an acid brush to paint the stuff on. It holds up very well. I would like to Powder coat my manifolds as well, but no bucks for that!

notmrgoodwrench 09-03-2002 03:02 PM

well thanks alot guys for all the help i have some ideas to go on now ill check around and find out who does this stuff and go from there thanks again guys

jprowse00 09-03-2002 05:46 PM

i have had good luck , with any of several brands of "hi-heat " paints , even bar-b-q paint ..the trick is preperation , and some heat .. first thing is sandblast the manifolds to get all the crud and old coatings off .. hang in ventilated area , wash down with laquer thinners to get the oils off , then warm them to "can't touch " hot with propane torch ,or acet torch ."assuming you can't put them in the oven ".. the heat both drives any moisture out , and helps the paint "flash-off " ,between coats ..talking spray bombs here ..several lite coats , let tack off 3 to 5 min per coat .. once you'v got good coverage , gently re-heat , thru the ports , and outlet , then leave them alone for a couple of days .. if its warm/hot where you are , hang them outside in the sun .. mother natures bake oven ... works for me , good luck ..jim prowse..

notmrgoodwrench 09-04-2002 04:47 AM

thanks i might try that too just not sure which way im goin yet but at least i have lots of idea thanks

HotRodS10 09-04-2002 01:51 PM

How well does Powder Coating work on headers? I actually had this conversation with a buddy of mine last week and he said it would work good....has any of you guys tried this yet? If so how is it holding up?

notmrgoodwrench 09-04-2002 03:15 PM

well i called a guy today to see about powder coating my manifolds and he said that it would never last i told him that i had heard of people doing it to theirs and they had good luck and he said no way it will not work and he owned a powder coating place so not sure if he knows what he is talking about or not so im gonna try one of the ideas you guys have given me here just not sure which one yet

4 Jaw Chuck 09-04-2002 08:09 PM

Powder coating is polyester based, how long would a pair of polyester pants last on your exhaust manifold? The plaid ones last 10 seconds longer than striped. :D

Powder coat will not work on exhaust manifolds/headers, heads, intakes (with exhaust crossovers) or polyester pants. :p

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