Are the main bolts torque to yield bolts or not?

 

no...

 

Yes, as far as I know they are.

 

Sure as hell didnt look tq to yield to me or mjhoward. Either way I put arp main studs in my motor. FYI the side bolts for the mains arent tq to yield either.

 

They must be tq to yield according to the tq specs. Never looked into it before due to not reusing them anyway.

Crankshaft Balancer Bolt (Installation Pass-to Ensure the Balancer is Completely Installed) 240 lb ft
Crankshaft Balancer Bolt (First Pass-Install a NEW Bolt After the Installation Pass and Tighten as Described in the First and Final Passes) 37 lb ft
Crankshaft Balancer Bolt (Final Pass) 140 degrees
Crankshaft Bearing Cap Bolts (Inner Bolts-First Pass in Sequence) 15 lb ft
Crankshaft Bearing Cap Bolts (Inner Bolts-Final Pass in Sequence) 80 degrees
Crankshaft Bearing Cap Side Bolts 18 lb ft
Crankshaft Bearing Cap Studs (Outer Studs-First Pass in Sequence) 15 lb ft
Crankshaft Bearing Cap Studs (Outer Studs-Final Pass in Sequence) 53 degrees
Crankshaft Oil Deflector Nuts 18 lb ft

 

Sure as hell dont look like the ones that go into the heads at all. Moral of the story use ARP main studs and head studs

 

it doesn't say not to reuse them so why would they be torque to yeild? but it says use new crank bolt so maybe it is?

 

I have never seen a non-tq to yield bolt that had tq + degrees of rotation it the tourqing sequence. Your gm parts department shoud be able to tell you for sure.

 

I finally got to talk to someone at ARP that could get things done. They have 15 sets of main and head studs coming out of R&D. Guess who's having set shipped to them friday Finally more parts for me...

Sorry- can't help with your question- just siked about getting the studs.

 

Sounds like you are breaking uncharted ground with your 5.7 Hemi. Keep it up!