Putting ANY kind of "dope" on the threads of a head bolt will affect the ability to keep the torque constant. Are you REALLY worried about the head bolts backing out? Never seen it happen on a Cub in my 40+ years of wrenching. If that thought bothers you, you might try some LocTite...but be prepared for a cussing from the NEXT guy who has to remove the head.
The ONLY engine I ever saw that required any sealant on a head bolt was the '66-up AMC V8's, which had ONE head bolt that passed through a coolant passage, and required #2 Permatex. Since a Cub doesn't have that occurring, I have NO IDEA why you'd want ANY sealant on the threads. Because a properly torqued head, with no cracks and a flat surface, sealed with a quality head gasket to a flat block deck surface with no cracks, simply IS NOT going to leak.
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Today's Featured Article - Stories From Old Farmer - by K. Pratt. Old Farmer, a.k.a. Dale Jensen began posting messages to our discussion forums at the grand age of 75. With extensive knowledge of farming and tractors, he valued the past and the ways that went with it. He shared these values with us until shortly before his passing. I spoke with Dale in his last days and requested his permission to share some of his stories with the readers of our magazine. He agreed, and provided the
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