August 04, 2026, 12:00 PM
Bruce WilliamsRod bolt torque ??
Looking for some help on torque spec on an older Oliver rod for a SBC.
I have called Oliver numerous times. I get a generic message that no one is available and the mail box is full.
The bolt is a 7/16 thread, Under head length is 1.3" head bolt is 12 point 1/2"
Head of bolt is marked Oliver Std USA ARP 819.
If any one has any information on the correct torque, angle and or stretch it would be greatly appreciated.
I will call ARP next but they have never provided any information on anything that is made as a proprietary bolt for a manufacture
August 04, 2026, 12:25 PM
RPROGASOliver has a unique process for torquing their rod bolts that requires the use of a Snap-On TA360 (Or similar made tool). I've forgotten the exact process but it requires tightening the bolts to a pre-set number, then relaxing the nut, then tightening it a second time to a stretch number using the TA360.
You really need to contact Oliver about the process, someone at ARP may have the info, and with all due respect, call Oliver I think the bolt material may be proprietary, not the normal ARP material found in a catalogue.
Good luck:
Bob
August 04, 2026, 12:59 PM
Bruce Williamsquote:
Originally posted by RPROGAS:
Oliver has a unique process for torquing their rod bolts that requires the use of a Snap-On TA360 (Or similar made tool). I've forgotten the exact process but it requires tightening the bolts to a pre-set number, then relaxing the nut, then tightening it a second time to a stretch number using the TA360.
You really need to contact Oliver about the process, someone at ARP may have the info, and with all due respect, call Oliver I think the bolt material may be proprietary, not the normal ARP material found in a catalogue.
Good luck:
Bob
Thanks Bob
Yes Oliver uses the torque angle to check stretch.
Due to the bolt being Oliver proprietary ARP will not provide any information.
I thought of replacing the bolts but ARP does not have any bolt listed in their catalog that is 1.3" under head length.
August 04, 2026, 01:46 PM
B KINGDid you see this on their site.
https://oliverracingparts.com/...5/2023-BOLT-INST.pdf2BKING
August 04, 2026, 10:42 PM
Bruce Williamsquote:
Originally posted by B KING:
Did you see this on their site.
https://oliverracingparts.com/...5/2023-BOLT-INST.pdf2BKING
Mr. King, yes I have been all over that page.
The bolt I'm needing information on is only 1.3" under the bolt head long.
All of the Oliver and ARP bolts are minimum 1.5"
