Painting Engine

When painting the engine, do I Primer it first? I have the Hi-temp paint - and the Pre-paint cleaner... Just havent found anything related to prepping the engine....

My major thought to why the answer is no - I have not found any "Hi-Temp" primer... ;) Just thought I'd check here with all the knowledge..
 
frost0100 said:
When painting the engine, do I Primer it first? I have the Hi-temp paint - and the Pre-paint cleaner... Just havent found anything related to prepping the engine....

My major thought to why the answer is no - I have not found any "Hi-Temp" primer... ;) Just thought I'd check here with all the knowledge..

I have never put primer on mine for the reason you mention.

HistoricMustang
www.historicmustang.com
 
I saw a Clear Hi Temp paint the other day at WalMart. Its made by plasti Kote. Its in the same looking cans as their other hi temp paints. I was thinking why in the world would they make clear hi temp paint but now i see why. Is it necessary to put a clear coat on?
 
iskwezm said:
I have never used "high temp" paint on a block.i just use normal automotive paint in a gun and it worked great,never flaked or i even used Krylon. I only ise high temp on exhaust parts.


i sorta want to clear stuff up on that. If you are going to the paint store and asking for paint to paint a motor, they are giving you an acrylic enamel most likely, not a regular paint for a car. Most cars (with exceptions) are base coat/ clear coat paints. They will fade/crack due to block heat after a year or so...maybe 3 if you are lucky. If you use an enamel based paint it should last a long time.

Most paint supply store can mix it in an aresol (sp?) can for you if you dont have a paint sprayer and compressor
 
xoxbxfx said:
i sorta want to clear stuff up on that. If you are going to the paint store and asking for paint to paint a motor, they are giving you an acrylic enamel most likely, not a regular paint for a car. Most cars (with exceptions) are base coat/ clear coat paints. They will fade/crack due to block heat after a year or so...maybe 3 if you are lucky. If you use an enamel based paint it should last a long time.

Most paint supply store can mix it in an aresol (sp?) can for you if you dont have a paint sprayer and compressor
nope, i used the same paint that we used on the body and it lasted more then 4 years so far.
 
iskwezm said:
I have never used "high temp" paint on a block.i just use normal automotive paint in a gun and it worked great,never flaked or i even used Krylon. I only ise high temp on exhaust parts.

On the exhaust I have had pretty good success with the high temp coatings from Eastwood. For the price this stuff is very good.

HistoricMustang
www.historicmustang.com
 
iskwezm said:
nope, i used the same paint that we used on the body and it lasted more then 4 years so far.
That's true. I really don't know why everyone thinks their engine gets so hot that normal paint of any kind won't work. Except for the exhaust port area of cast iron heads, the rest of the block and heads stay fairly cool. If your water temp is 180-200 or so, you gotta figure the metal it's cooling (i.e.-the block) is pretty close, right? BC/CC paint will work just fine for likely as long as the motor, but then again I've had motors that only lasted for a year...
 
I went a wee bit different route on my paint. I first brushed on Zero Rust and then topcoated with the spray bomb Ford Blue. It has stuck better than just using the spray bombs. I don't have a chip or flake anywhere on the motor, including around the exhaust ports on my stock heads. I have some discoloration at the front of the motor at the edge of the intake manifold but that was from leaking coolant. I also see that POR15 has engine paint but i've heard bad things about the color not matching.
 
HistoricMustang said:
I just put the black on the Coupe exhaust manifolds and it is holding up very well.

HistoricMustang
www.historicmustang.com

I painted my manifolds with POR15 high temp header paint and it is still holding strong. It's pretty hard to get the manifolds clean with the pitting they normally have, plus i don't have a sandblaster. Surface prep wasn't the best but they are still holding after 8k miles.
 
Isn't it amazing how well some of the current exhaust paints work? I use Eastwood's stuff on cast manifolds, and brush it on freshly blasted manifolds and it held up since '96 on my wife's Corvette. I remember the old days of painting headers with VHT (I always had a thing for white headers) and it would last about a day or so before flaking off. My current headers are ceramic coated and will likely outlast the motor.