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I don't think the head / main /conrod bolts on these motors are torque-to-yield, so what is the consensus on re-using them? Considering the damage from any of them going south, replacement is probably the way to go. If anything, I'll use new headbolts just in case an old one decides to shear off. That would be bad.

Chuck
 

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None of them are torque to yield - that is a technique that post-dates B20 design.. I reused the main and con rod bolts on my B20 rebuild, in part because I could not get the dam con rod bolts out of the con rods. I think I did use new nuts on the con rod bolts. I also used new head bolts, in part because I picked them up pretty cheap from CVI

https://www.cvi-automotive.se/en/ar...ad-b18b20b30-10-pcs-for-b18b20-14-pcs-for-b30

CVI charges $3.50 per bolt when you buy 10 and when I did my rebuild 5+ years ago I think they were even cheaper. If I were paying the genuine Volvo price and the original bolts looked to be in good condition I might be inclined to just reuse them.
 
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