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+--- Thread: Painting inside of crankcase and valve chamber (/showthread.php?tid=3858)
Painting inside of crankcase and valve chamber - Spex - 05-02-2020
Could someone please explain the reasoning for this.
I was always led to believe that painting aluminium reduced heat transfer.
As for the valve chamber?
Cheers,
Peter
RE: Painting inside of crankcase and valve chamber - Bob Culver - 05-02-2020
I think it was done to contain casting sand not fully removed. effect of modern fuel in sump is questionable. Run on non detergent oils engines accumualted a jet black varnish which made it hard to see what you were doing. Paint helped.
RE: Painting inside of crankcase and valve chamber - Chris KC - 05-02-2020
I noticed that too Peter!
Not in any engine of mine....
RE: Painting inside of crankcase and valve chamber - stevenm - 05-02-2020
I'd never heard of this but apparently its a thing.
They used to paint the engines with GLYPTAL which was an elastic oil resistant paint used to fill pores in the castings , stoping debris build up and helping the oil return to sump faster... in theory , theres a good thread on the MG forum...
https://www.mgexp.com/forum/mgc-forum.48/internal-engine-paint.2764564/
( I also have an MGB but I've begun tinkering with pre-war now so all is not lost )
RE: Painting inside of crankcase and valve chamber - Chris KC - 05-02-2020
Until it starts to fall off and....
RE: Painting inside of crankcase and valve chamber - Adam Brown - 05-02-2020
Speaking as a seller of paints - don't do it!
RE: Painting inside of crankcase and valve chamber - Spex - 05-02-2020
Thank you all for the replies.
I would be worried that the paint would come off, especially if the surface was not new .
Soda blasting seems to be the only method of removing the old carbon inside the crankcase without leaving nasty surprises behind.
Whether it is clean enough for the paint to stick over the "pores" in the casting, who knows.
Perhaps if the casting is new?
Cheers,Peter
RE: Painting inside of crankcase and valve chamber - Colin Wilks - 05-02-2020
Vapour blasting or aqua blasting is another method that brings an aluminium crankcase up like new.
RE: Painting inside of crankcase and valve chamber - Steve Jones - 05-02-2020
Have you somewhere local you've used, Colin?
Steve
RE: Painting inside of crankcase and valve chamber - Chris KC - 05-02-2020
I have generally cleaned up cases in the past with a stiff brush, gunk and lots of effort. In my experience what's there is usually fairly well stuck! Though I succumbed to temptation recently and had a couple dunked in the bath at my local engine recon shop and I must say the results are impressive.