Just got back from a trip to Wisconsin today. I guess I should have typed the whole thing out, Stock Square ”˜O’ ring seal gp 0.308 , pn 3835333.
The only picture I can find right now is for aftermarket
seals in Chevs of the 40’s catalog.
http://www.chevsofthe40s.com/detail/7504.html About all they’re going to seal is the oil that might pool in the retainer and run down around the keepers. The aftermarket umbrella seals completely seal the stem and only allow a small amount of oil to get to the stem. I always thought that was too much of a seal. But that being said, a lot of the new engines are equipped from the factory with the umbrella seals. Might be because of new materials used in heads/guides, new ideas about how much lubrication is needed or maybe better oil additives in today’s oils, I’m just taking a guess about that.
Also I think I may be wrong about the steel under the springs in the one picture. There is only one layer of steel which I think are actually 0.311, 838639 seats which most of the 6’s used. Been a while since I did my own head work and these heads were assembled at the machine shop.
Denny Graham
Sandwich, IL