Guest EShepard Posted September 8, 2008 Share Posted September 8, 2008 I am currently restoring an early truck that has an engine with an aluminum crankcase. The crankcase has been dipped to remove grease etc. My question is what is the best method to finish the crankcase? Information I have indicates that the aluminum was not originally painted.Thanks Link to comment Share on other sites More sharing options...
Steve Braverman Posted September 8, 2008 Share Posted September 8, 2008 Leave it naked. That's most likely what was done originally. Link to comment Share on other sites More sharing options...
HarryJ Posted September 9, 2008 Share Posted September 9, 2008 Aluminum crankcases of the twenties were frequently coated with aluminum paint. As I understand, this would help seal the castings. Link to comment Share on other sites More sharing options...
Steve Braverman Posted September 9, 2008 Share Posted September 9, 2008 You can, and probably should, paint the inside with red Glyptal. I believe Franklin did that with their later engines. It seals the pores of the aluminum and improves oil flow. Glyptal is available from Eastwood.http://www.eastwoodco.com/jump.jsp?itemID=2298&itemType=PRODUCT Link to comment Share on other sites More sharing options...
Guest Steve_Wilson Posted September 9, 2008 Share Posted September 9, 2008 I've done quite a few restorations on aluminum engine components and have used Green Loctite on all the inside areas. It permeates into and casting flaws and seals the surfaces of the castings . It does not color the aluminum in any way and makes external surfaces easier to clean once cured. After brushing on the surface I wipe away any excess with a clean wipe. Link to comment Share on other sites More sharing options...
Guest imported_oldmitchell Posted September 20, 2008 Share Posted September 20, 2008 Glyptal on the inside, aluminum spray paint on the outside, followed by several coats of automotive clear coat with a non gloss additive. This seals the block from both sides and seems to very closely duplicate the original finish. Link to comment Share on other sites More sharing options...
Mark Shaw Posted September 22, 2008 Share Posted September 22, 2008 It seems you have different answers from different people. I agree that sealing the inside is a good thing to do. I have several cars with aluminum crankcases and none of them has paint on the outside of the case.. Link to comment Share on other sites More sharing options...
Steve Braverman Posted September 23, 2008 Share Posted September 23, 2008 Isn't painting aluminum with aluminum paint redundant, kind of like painting stainless steel with chrome in a can? Link to comment Share on other sites More sharing options...
Restorer32 Posted September 23, 2008 Share Posted September 23, 2008 If you don't paint the outside of the case it will be very susceptible to finger smudges, oil leaks, etc. Link to comment Share on other sites More sharing options...
Mark Shaw Posted September 23, 2008 Share Posted September 23, 2008 If it is going to be an over-restored trailer queen, go ahead and paint the aluminum. If it will be driven on tours & restored as original, don't waste your time....My 2 cents... Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now