convincor

Chevy books say to use oil on threads not sealant on a gen VI 502.
Pulled heads off and GM used sealant
What should be used?????
Holes are not open to water jackets.

BadDog

First off pop for a set of ARP head bolts. They are not that much. Then use their assembly paste and follow their torque specs. Read up on this here;
http://www.offshoreonly.com/forums/s...&highlight=ARP
Been covered with good answers.

Tim T.

formulaF302

I have re used my head bolts in my Gen VI motors 3 times now....last time when I switched to wold products heads. I had to put spacers under them to fit, and lubed everything with 30 wt oil....but all is still fine. I have since found out however that those bolts are not designed to be re used since they are a "stretch to yeild" type of bolt. I've had no problem YET....but am starting to get concerned after reading this forum.... Glenn

Cignificant

Same here Glenn - third go round on blower motors and no problems. Next time I'll replace them.

Dave F

It's better to use the assembly lube rather than oil on blind tapped head bolts.
It's possible to "hydrolock"(compress oil in the hole) the bolt which will give you a false torque reading.

Because the holes are blind sealant is not needed. The assembly lube will give a more accurate torque reading.

DAVE

bobby daniels

DAVE your right and thats very common !!

I could not get away with using the same head bolts 3 time period ,,damn you guys are lucky and change to ARP their great
Washers (more than one ) is impossible to get the right reading

formulaF302

I did use the ARP washers as spacers below them(even though I did'nt like the idea of doing it) ...and although I used a very light coat of oil on the threads I did use assembly lube on the washers and below the bolt heads. Maybe thats what saved me cause things are still Ok after running this week.