While letting the car cool down to install headstuds I was searching for a question I had and that is on which end does the lube go? In the block, or on top of the stud, or both ends? I haven't really found a clear answer. TIA

 

The critical area is the top of the stud. The idea of the moly lube is to reduce the friction between the stud and the nut so that the torque applied is converted to clamping force rather than overcoming fastener friction. Once the stud is threaded into the block there isn't any significant torque applied on that end.

Read the installation and thread break-in directions provided by ARP's website very carefully. The relationship between fastener torque, fastener friction and clamp force are important to understand.

 

Will do, thanks.

 

F, their website is down for construction

 

I used it on both ends....no problems so far.....

 

Do not put it in the block threads.

Also watchout for the ARPs I had the first headstud ever crack and stretch out of about 30 sets. If it would have broken all the way through I would have jumped off a bridge. It would not even tq to 70.

The instructions state 70ft lbs. They say 65ft-lbs when you call. I usually tq-to customers request to a certain point. I have done as high as 88ft-lbs on my personal vehicle. Most I do are 70-80ft-lbs however.

 

I guess I answered my own question here.

I know the block threads should be dry and oil free so I went out and got about 1k of q-tips.