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 - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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