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Old 07-11-2019, 07:36 AM   #3
Joe K
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Join Date: Jul 2010
Location: Cow Hampshire
Posts: 4,175
Default Re: New head studs or no

The only thing you risk is possibly breaking one on install/torquing. And having to start all over.

If you get it in and torqued, its probably good for the life of the head gasket. Maybe longer.

The most severe force a fastener sees in its life is the initial torquing - that if its done right. Thermal cycling is recommended (each cycle measurably relieves the stress) so you're essentially "re-torquing" to bring the initial stretch back. If it survives that, then its good.

Again, if it survives...

Note that new fasteners CAN fail - although the failure rate is significantly lower.

Joe K
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