Loctite and ARP main studs

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That depends, to the block sure, just be sure to torque them immediately after installing them & let the locker set up. Cap-side, no, moly lube as supplied/instructed. Be sure to check for stud intrusion into oil gallery as alerted to by Dutra.
 
Use oil on the coarse threads into the block, & ARP lube on the fine threads/nuts.
 
Use oil on the coarse threads into the block, & ARP lube on the fine threads/nuts.

I did a couple , just to compare (experiment) , no diff in anything , except they are in there and cant be unscrewed ------------easily.
 
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