Head stud sealant?

December 12, 2020, 08:16 PM

Will Harrison

Head stud sealant?

What's everyone's go to thread sealer on a GM block? I'm thinking "right stuff"

.991 60'
4.36 @ 159 so far.....
6.86 @ 198 trying for more......

533" single carb
235" Harrison 4-link

December 12, 2020, 08:34 PM

rusty

i would use a true thread sealer.i have used several brands but arp is hard to beat

honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

December 12, 2020, 09:58 PM

imakehp

I always use the black tar stuff with the brush in the cap.It's made by Permatex I think. And you can go to a plumbing supply house and they sell these large white crayon looking sticks that you just scrub on the threads before you install the bools/studs..

December 12, 2020, 10:27 PM

Alaskaracer

I used red silicone last time I had studs in a water jacket...worked like a charm

Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com
"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer

December 13, 2020, 08:50 AM

RPROGAS

I've used both Permatex Indian Head sealant and the equivalent ARP version. Both worked great but you are not going to save the head gasket if the Indian Head sealant gets on the surface of the gasket, and Cometic's aren't cheap.

Bob

December 13, 2020, 08:57 AM

Canted Valve

I vividly remember cleaning up the threads of the block that was in a car I bought that had used permatex (#2 I think). What a PITA, and I assume right stuff would be the same, although do the job, just a ***** to clean up. When it went back together I used plumbers silicone paste, which is used in steam fittings, and all was well.

Illegitimi non carborundum

December 13, 2020, 09:26 AM

markemark

quote:
Originally posted by Big Steve:
Locktite 567

^^^^^^^ Yep. Used this in industry. Talk to any steam / pipe fitter.

December 13, 2020, 10:16 AM

Big Steve

quote:
Originally posted by markemark:
quote:
Originally posted by Big Steve:
Locktite 567

^^^^^^^ Yep. Used this in industry. Talk to any steam / pipe fitter.

I spent 7 years working on steam sterilizers, that all I used, nothing will leak past this stuff. I use it on the rocker stand bolts that go into the intake port on my current engine and also any water or oil fittings

December 13, 2020, 01:04 PM

Curly1

quote:
Originally posted by imakehp:
I always use the black tar stuff with the brush in the cap.It's made by Permatex I think. And you can go to a plumbing supply house and they sell these large white crayon looking sticks that you just scrub on the threads before you install the bools/studs..

I have used the black Permatex tar looking stuff. It worked well but what a mess.

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December 13, 2020, 09:20 PM

Steve from Pa

I could never get Teflon thread sealers to work, Permatex #2 for me every time now.

Most important, keep the shiny side up

December 14, 2020, 05:39 AM

SCDIV1

A wire wheel cleans bolts/studs easily..

Lacquer thinner is your friend also to clean things as well as your hands....

Silicone is a poor choice and always has been. It was never meant as a thread sealer....period.

Ends up in the oil pan and oil pump pickup when you use tons of it

December 14, 2020, 09:07 AM

Canted Valve

quote:
Silicone is a poor choice and always has been.

Ultra gray is on another level from conventional silicone.