You can go over those manual's torque specs if you have ARP-bolts because standard bolts are weaker than block's threads.



Hyvinkää, FI

The shop manuals have errors or things that need to be modified so I never take them as 100% Gospel. The problem is the modifications and changes only go to dealers in the form of Service Bulletins.

It may be verbiage left over from the flathead manuals that the proof readers missed since most of the head bolt holes go into water on those. Those kind of mistakes in manuals can go on for years before somebody notices and removes them.

Maybe the sealer is to lubricate the threads in place of oil or grease. ???

When purchasing bolts from Fastenal, I just make sure that they are made on this side of the world.  I’ve no problem with bolts made in Canada.

Lorena, Texas (South of Waco)

if ther is a cat dealer near by they have them. thats wher i purchased myn,also got hardened washers from them.

Thank you Ted, my old eyes must be failing as I looked at Johns site and missed them. I've seen some recent posts of people having problems with Fastenal bolts being made off shore, don't know how true that is..

John Mummert sells a grade 8 head bolt kit which are ARP bolts.  An alternative is to simply go to any bolt manufacturer and get the appropriate ½-13 grade eight bolts in the appropriate lengths.  I have used the local Fastenal in the past to provide the necessary grade eight bolts but I use the ARP heads bolts most of the time.

Lorena, Texas (South of Waco)

Where are the grade eight bolts available ? I've only found stud kits..

The grade six head bolts are notorious for stretching as they age.  I’ve never had an issue with the factory installed grade eight bolts so I’ll reuse those but any of the older grade six bolts I’ll replace with new grade eight bolts.  The grade six bolts can be recognized as having four hash marks on their tops while the grade eight bolts have six hash marks.

Lorena, Texas (South of Waco)