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Old 11-17-2015, 10:33 PM
tjo tjo is offline
 
Join Date: Dec 2009
Location: La Center,wa
Posts: 242
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You guys are way over thinking this. The substitution is fine unless we are talking about cylinder bolts, or case bolts, or rod bolts, but if that were true, they wouldn't be grade 8.8, which is the SAE grade 5 equivalent.

It sounds like they used the low strength bolts to save the case and make it so the bolt would fail if over torqued. I think the only risk with a higher strength bolt is overtorquing and damaging the engine case (or whatever the bolt is threading into).

Tim

Last edited by tjo : 11-17-2015 at 10:37 PM.
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