Pelican Parts Forums - 1979 SC Chewed a Valve

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The oil pressure gets a flat aluminum, copper if you happen to have one.
Bruce

Quote:

Originally Posted by rwest (Post 12560203)

I haven’t read a lot of the middle portion of this thread, but did you have the heads rebuilt? I would think that old exhaust studs would have been in real bad shape and the rebuilder would replace them? If they did, they should come out easier than old heat cycled ones.

Heads were rebuilt, with a twist. One of my heads was destroyed when its valve went rogue. So I sent my heads along with a bonus used head to the shop.
My heads started with very long exhaust studs, as evidenced by the pile of washers that fell out when I took off the nuts.

When the refinished heads returned, 5 had long exhaust studs and 1 had a single short exhaust stud. I added a second matching short stud to the 6th head. But I had forgotten about the long studs, until I was looking at them sticking an extra half inch out of the exhaust headers.

So... the rebuilder returned 5 long studded heads, and a head with 1 short stud. I presume this means these are the original studs. Seems kind of odd of them.

Quote:

Originally Posted by Flat6pac (Post 12560206)

The oil pressure gets a flat aluminum, copper if you happen to have one.
Bruce

I probably have one somewhere in these baggies! Thanks for the info.

Also Wayne's book called for 25 ft/lbs on bigger camshaft oil line nuts. The crush washers were squishing more easily than that, so I stopped. Seemed too high of a torque target. They are all accessible, so if they leak I can redo easily.