Hey guys,

My ARP L19 head studs came without any instructions on torqueing the heads down. I'm running big boost, so I was planning on torqueing them an extra 15 ft/lbs, but we have no idea what the base number should be.

Any ideas? I did search but no luck..

trying to get info out of ARP as we speak, will update as I know

 

Actually, it turns out these were specially manufactured for APE, so I had to get the torque numbers from them.

For my application (boosted)

Pinch studs = 25 ft/lbs
and the rest = 100 ft/lbs in 4 steps.

 

The standard ARP bolts are 30, 50, then 70, and 20 for the small ones. I torqued mine down to 75 after the 70. Once they were all torqued down, and sat for a few minutes, I broke each one loose and retorqued it. I had one back off on me last time.