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painting engine need info?

G

gat2013

Active member
I am getting ready to start painting the engine so it will be ready to be put together but my question is how hot do the jugs normally run temp. wise so i can know if the paint will hold up
 
What about getting it powder coated? Thats put on with heat, so it may hold up pretty good.Later,Cajun
 
I agree with Cajun, I would say to get them powdercoated. I think that would hold up a lot better than any high temp paint, and look better to in my opinion.
 
Where ya located??????????? I gots pull with a powder coater here in Hernando County. Cajun
 
Prime the cylinders with zinc-chromate and paint with an aircraft engine paint, I use Randolph brand paint. The cylinders are then baked to cure the paint The curring will prevent the scorching or burning of the paint. Enamel paint will hold up to about 350 degrees F. The cylinder should be blasted before painting. There maybe better methods today. Zinc-chromate is hard to find, I just bought a gallon from PPG last week. Old Lycoming manuals have the procedure for painting engines and cylinders in them.
Hope this helps.
 
Cylinder temps are normally 400 degrees or less but the book shows 550 degrees as the max never exceed for most cylinders. Zinc Chromate is an etching primer used on aluminum as the first coat. For steel parts a regular primer is fine. Use a primer sealer before the first coat of color on both.

Zinc chromate is available at any aircraft supply store. Aircraft Spruce is a good source.
 
Maybe this will help...Basic powder coat will hold up to 600 degrees and Hi Temp powder to hold up to 1200 degrees if applied properly.
 
Powder coat sounds like the way to go. If your cylinders are getting over 600 degrees they won't last very long. I've seen pictures of the head coming off the cylinder barrels but never in person. That would be bad.

The engine case doesn't get that hot, so, any paint should work. I still like the idea and look of a powdercoated engine. If you want a show piece I would get ahold of Mike Thurman. Those are some nice looking engines.
 
ceramic coating is another option- its a little bit pricey, but it'll disperse the heat much better than powder coating will. my buddy has his done, and within a minute or so, after shutting his motor off, you can put your hand on the valve covers and they wont burn you. pretty good stuff, but like i said, you're going to pay a little more for the job.
 
i talked to JC Stanley and he said that there's also an aluminum spray that works even better than ceramic coating does as far as dispersing heat goes. not sure if there are different color options for it, but it sounded like pretty good stuff too. there's a shop in orlando that does it, if i'm not mistaken.
 
I would like to know more about the "aluminum spray"> What is the product name and who does the application.
 
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