I just purchased a set of 8mm 240 rods for my new engine. The rods have been lightened and have had ARP bolts installed. What is the proper torque for these rod bolts? They are 8mm.

Have you called ARP?

Hi ZSaint,

I to am in process of rebuilding a lack luster SCCA ITS engine with 8mm rod bolts...So I gave ARP a call..info from ARP website.

I called Pete at ARP and he told me that 30 pounds with the moly lube is the recommended torque value.

Good Luck with the build up

Hope you got a good deal on those rods!!! :classic:

david

From an ARP build sheet:

Rod Bolt part # 202-6003

Use ARP Moly Assembly Lubricant to lubricate the threads of the bolt and nut face.

ARP recommends using the STRETCH METHOD for torquing blots. Follow instructions for using a stretch guage. Stretch bolts to .063 - .067.

If you do not have a stretch guage, follow these steps using the ARP Moly Assembly Lube. After the rods are installed into the motor, torque bolts to 40 ft lbs. Loosen the nuts. Torque to 40 ft lbs again. Loosen the nuts and torque to 40 ft lbs a third and final time.

ARP (805) 339-2200

Ed, thats exactly what mine said. Mine were 9mm though, dont know if that would make a difference or not...

I am liking the 30# torgue for the 8mm bolts. I will use the stretch factor to make certain we have sufficient torgue. Thanks guys!