Dirty_Bird

Just to clarify since i think i know the answer. Arp main studs/bolts kit, need line hone before assembling motor right?

SS RRR

iTrader: (2)

Definitely.

Dirty_Bird

What i thought

ACE1252

Ditto on SS RRR's comment.

I did try ARP bolts on my mains to see if I could use them without any machine work, but the clearances changed waaaay too much(too loose).

SS RRR

iTrader: (2)

You also want to follow ARP's torque specs. Not stock.

Catmaigne

iTrader: (6)

It's not about them being loose or tight, bearings will dictate the clearance. Changing the fastener can distort the main and make it ovate so a line bore may be needed to make things circular again.

SS RRR

iTrader: (2)

Not sure if that was from what I last said, but that is not what I was getting at. The torque specs on ARP hardware is usually different than stock, therefore it is best to find out what torque those fasteners need rather than going by a GM manual.

Dirty_Bird

Arp uses different torque specs for hardware. I understand its a no no for arp studs on mains without line hone haha

Catmaigne

iTrader: (6)

My comment was in reference to ACE's post. I know the torque spec depends on the fastener.

What I was saying is that changing the fasteners can distort the metal and make bores out of round. The only way to know if a line bore is absolutely necessary with ARP studs is to measure, but I wouldn't count on it.