I have my 26D six cylinder on the engine stand crank side up looking into
the crankcase. The interior of the crankcase appears to have been painted
with a red to red oxide color coating. It's definitely not rust or sludge
residue but a coating of some sort. There is about 50% of it left on the
crankcase walls and webs. Were these engines originally painted inside the
crankcase? Or did some previous owner just paint it in the distant past? I
know that some rebuilders will use a product called Glyptol to coat the
valley pan area under the manifold of V-8's to improve oil scavenging.
Thanks,
Allyn
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