HEAD STUD QUESTION

[Gary]

what does everyone put on their head studs and main studs to keep them sealed and from backing out when removing the nuts? thanks Gary

[Wolfplace]

Guest-Gary said:

what does everyone put on their head studs and main studs to keep them sealed and from backing out when removing the nuts? thanks Gary

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For main studs I usually just use oil & screw them into the block.
If I don't want them to back out I use blue locktite.

In applications where we use head studs that go into water I locktite them in almost all instances.
When you locktite them you must install the studs, install the heads & torque them lightly & let the locktite set up or torque completely if you are done checking things.

I for one am not a big fan of ARP's sealant.
I've had too many leakers especially with studs.
Works excellent on pipe threads though & fair on bolts.

The ARP is good stuff, just don't use it with head studs. It will likely leak.
With studs you are not turning the male /female threads against each other like you do with a bolt & the Teflon stuff regardless who makes it works best in an application where you are actually tightening or "setting" the threads against each other like pipe threads do.


For years all I ever used was Permatex Hi Tack or non hardening sealant #2 & then started using Hylomar & never had a leak.

Permatex has a somewhat new thread sealing compound we are using now that works great.
I like it better than any of the other stuff we have used.
Oddly enough it is called Thread sealant

I use the HI Temp (59235) as Permatex tech says it is the same as the hi performance only with a higher temp rating.

Also, I have had some luck sealing after the fact with the "pills" sold by Silver Seal called Rebuilder Tabs I believe. They are designed to seal up minor leaks at core plugs & threads.