View Full Version : Painting exhaust manifolds.
08-30-2003, 05:40 PM
I gotta pull my manifold to replace a stripped stud, so while I got it off, might as well paint 'em! Some questions:
I've wire-brushed and rattle-canned manifolds before and they usually rust through the paint in no time.
This time I have a sandblaster, so I was gonna blast 'em first. Do I need to use some sort of primer, or can I just rattle-can header paint on 'em? What is a good brand? Rustoleum makes a high heat bar-b-q paint (good up to 1200 deg.) it comes in a bunch o' colors, can I use that?
Enough questions for now. Enjoy the long weekend,
08-30-2003, 05:50 PM
I blasted mine and then used the high temp cast blast grey, no primer. It held up quite well. The rust spots coming bask were in the areas i went a little thin on the paint.
08-30-2003, 05:55 PM
I have had good luck using POR-15 exhaust manifold paint. Comes in grey, black and silver. Just brush it on your freshly blasted manifolds. Did the set on my '64 Pontiac Tempest about 30K miles ago, still lookin' good.
----- Bart -----
08-30-2003, 06:25 PM
i used the high temp coating from EASTWOOD can either be brushed on or buy a spray can easy stuff and holds up nice .
08-30-2003, 06:48 PM
I'd like to try the por15 or ceramic coating, but unfortunately I gotta do i this weekend, so I have to go with something I can get locally.
08-30-2003, 08:25 PM
Don't primer it, because the primer is supposed to stick to the metal and the paint to the primer. If the primer can't take the 900 degree temps then the paint will flake right off with it.
I've used Duplicolor stuff in the past but not on Exhaust manifolds. I imagine anything that says 1200 degrees would be alright.
08-30-2003, 10:50 PM
I have used the Eastwood stuff on exhaust manifolds with great results. I always sannd blast the metal first.
On the exhaust pipes, I use the black BBQ paint for the tubes and mufflers from Home Depot. it holds up real well.
I tried everything on my manifolds with bad results till i used POR 15! Stuff is the best, brush it on & you're good for along time,easy to touch up if you need to & stays shiney.(Mines Silver)
I used a "aluminum" coating that I got at a auto flea market one time, I forgot the name but it was from some guy in Jersey & that stuff was great!! Brush it on afew times & it could actually be buffed up after. I ran out of it so I used the POR 15 & I had a hard time sandblasting it off!!
09-01-2003, 01:31 PM
I've used that Eastwood stuff and love it. The truck I used it on is not a daily but has been on there for 6 years and is just now starting to rust up again.
09-01-2003, 01:40 PM
I have always used the hi-temp BBQ black and had great sucsess with it . cheap , buy it on the corner at pepboys , and you can use it while the motor is running and still in the car http://www.jalopyjournal.com/ubbthreads/images/graemlins/smile.gif
thats funny b/c I use the same thing with great results...
as long as the manifolds are blasted the BBQ black wont burn off...
I used the Por 15 stuff on the rams horns in my shoebox. I'm pretty happy with it and I think it works pretty well. It's been there for close to three years (I touch it up about once a year for good measure) and it still looks good. One 1/2 pint can will last you a LONG time too....the stuff is thin and covers well.
if you don't want to blast them another option is to drop it off at a machine shop and have them dip it in hot tank. i had it done to the in. and ex. for my six banger and all the carbon and varnish dissappeared. they come back ready for paint, no prep. it cost 15 per manifold.
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