Question about main bearing bolts

psdguy95 · Mar 22, 2017

I'm in the process of rebuilding my motor and i came across a set of ARP main bolts for a good deal. My question is if i put the ARP's in do i have to align bore the mains or can i run them at factory torque specs?

Magnum PD · Mar 22, 2017

As long as your crank is straight you should be ok. If you have a chance to line bore it that be good. I believe 125 ft lbs would work. I would use plastiguage to make sure the bearings are flush and flat

psdguy95 · Mar 22, 2017

I'm not seeing any abnormal wear on any of my bearings so i'm sure its straight. Its going to be balanced soon here anyway so i can always have it checked. So i should be ok running them at ARP specs then? I just wanted to be sure before i messed something up.

Magnum PD · Mar 22, 2017

Just use plenty of the ARP assembly lube. Again, use plastigauge to make sure tolerances are in check

psdguy95 · Mar 22, 2017

Will do. Thank you!

psdguy95 · Apr 25, 2017

Are the factory main bolts reusable?

Magnum PD · Apr 25, 2017

I guess. Unless someone else says not to.

psdguy95 · Apr 25, 2017

Well the international manuals don't say anything about it and every where I've searched on the internet does t give a clear answer either. I measured my main caps with the arp studs installed and they distort about .0005". I don't have my crank back from the machine shop yet so I don't know how much that's going to effect my oil clearance yet.