[Fixer]

I'm repairing a 930 case now that has 10 pulled ARP head studs. 7 on the left bank and 3 on the right bank.

To test and find all that pulled I torqued all to 60 ft lbs. The ones that handled 60 no problem I will leave alone. Once the Snap On wrench clicked at 60 I immediately backed them off.

The 10 that are pulled I will Time Cert. The motor ran strong but I noticed that subtle loose exhaust sound.

When I checked the head studs initially I used 24 ft lbs and and several just wouldn't tighten. I looked with a mirror and could see the nut climbing up out of the head.

60 ft lbs found the rest. Some still sorta hold and pull slowly.

This is why I decided to contact ARP. This engine was just done using ARP I don't know for sure what torque was used but I suspect 38 bc the tight ones that did not fail were really tight.

Matt