I have never retorqued a head that did not take more to bring it back up to torque specs. I always clean the threads in a block and clean the bolts. I also lube the threads and under the head of the bolts. Any bolt that shows a sign of stretch of the threads will be weak in that area and needs to be discarded. That will be the bolt or stud that will pull into on retorque. If anyone has got by using a stretched bolt either did not retorque or needs to buy lottery tickets. I hate having to remove the head to replace one stinkin broken bolt after it is up and running.
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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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