80 ft-lbs is the recommended. You've had it warm, so go ahead and draw it down. Pattern is to start somewhere in the middle and work your way clockwise around the studs so that the end effect is that you're alternating ends, working out from the middle.
If it's terribly slack to start with (like under 65 ft-lbs) it wouldn't hurt to run it to warm a couple of times, and check them again after it's cooled back down. Abit of a pain in the neck becasue it means removing thte rocker and re-running the valves, but if lack of pressure on the head is the reason for the seep aroud the gasket, it will be small effort and expense for an easy fix.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
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