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Global Mod,
Mod | | | Forums66 Topics128,028 Posts1,055,414 Members48,422 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Is it necessary to apply primer to the engine block before coating it with engine paint? I would assume that primer does not have the appropriate heat withstand capabilities ? | | | | | Joined: Jul 2000 Posts: 504 Member | | Member Joined: Jul 2000 Posts: 504 | Others may differ but I have always just primered the sheet metal parts, oil pan, valve cover , etc., and sprayed engine paint over the bare block..
Bill M
53 GMC Hydra-Matic
Home Page
http://home.comcast.net/~bd97/index.html
When you argue with a fool, two fools are arguing..
| | | | | Joined: Aug 2000 Posts: 587 Shop Shark | | Shop Shark Joined: Aug 2000 Posts: 587 | The Bill Hirsch company, which sells really good engine paint, advises no primer for cast iron applications. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Thanks for the replies. Now I know how to proceed. | | | | | Joined: Sep 2002 Posts: 62 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2002 Posts: 62 | I, too, am getting ready to paint my engine. Currently the engine is painted blue. I plan to go back to the original grey. The blue paint is in good shape and adheres well, but the engine is pretty dirty and greasy.
Is cleaning up the engine with a good degreaser good enough or should the old paint be removed? Does it need to be media blasted? | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Clean it up and degrease it. Any paint that stays on after that deserves to be there. You can paint over the old stuff, as long as it was cured by running the engine for a while. Don't sand blast it, you will get it inside the motor.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I cleaned my block up with Polyclense, a cleaner which is made for cleaning paint brushes. I used rubber gloves and a brush. It took the best part of a day but it removed 50 years of grease, farm dirt etc. right down to the gray cast iron. It even removed surface rust. | | | | | Joined: Apr 2002 Posts: 11 Member | | Member Joined: Apr 2002 Posts: 11 | I bought the engine kit from por-15. followed the instructions and it turned out fantastic...brush on-dried like it was sprayed-NO brush marks.
63 K10 Fleet 454
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