Quote:
Originally Posted by austin8214
Why would using a grade 8 bolt be asking for trouble?
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Grade 8 bolts will break instead of giving a little when the engine heats and cools is what I have heard. Grade 5 bolts would be much better for head bolts and more than suffice for these small engines if a good head gasket is used. In my experience with grade 8 bolts, I found out by accident on my 460 farmall pulling a tree down. I have chain hooks on the front that I used two grade 8 bolts on and grade 5 bolts on the other hook not thinking about it, it's just what I had. The grade 8 side hook flew off and could have killed one of us. They did not bend, just broke clean off...
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1977 1650 with cast iron lower grill housing, cast iron oil pan, 54" push-snow blade, rear blade, disc-harrow, 44c and 48" decks, Two cultivators, #1 tiller with both extensions, loaded tires, 75' weights and chains, #2 cart.
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