In the 1930's and thru the 1950's it was (clearly defined procedure)
Come around and I will let you retorque a head and you can see the values change after warmed. I never neglect to clean the threads in the block or the head bolts. I also never neglect to lube the the bolt thread and under the head. I started retorquing heads in the 1950's and still do and get the same results. It was clearly explained to me at an Oliver dealer that this was done before you put the nuts on the valve cover. What might also seem strange to some I was also instructed to set the tappets with the engine running at idle. I have never worked on a car with an aluminum head or read the(clearly defined procedures)for them.
I have helped some that did not retorque a tractor head that lost the head gasket as a result.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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