The Ford Barn

19Fordy · 04-02-2019, 11:50 AM

Years ago I used FEL PRO Gray Bolt Prep # GRA2. It was the best. Now it's no longer being made. Contacted Permatex and they recommended ULTRA GREY TORQUE GASKET MAKER # 82194.
https://www.autozone.com/sealants-gl...ker/306563_0_0

I am dubious.

What do you folks recommend for thread sealer flathead head bolts?

Thank you. JIM

RalphM · 04-02-2019, 04:01 PM

Aviation permatex

philipswanson · 04-02-2019, 04:33 PM

Quote:

Originally Posted by RalphM

Aviation permatex

Ralph,

Agreed! That's the best!

See you in June....

Phil

flatjack9 · 04-02-2019, 05:23 PM

A good grade of teflon pipe dope is what I have used for years.

Talkwrench · 04-02-2019, 07:02 PM

Brian put me on to Loctite 577. lookin' good so far..

KiWinUS · 04-02-2019, 07:26 PM

Sponsored Links (Register now to hide all advertisements)

3M 8001 weatherstrip cement
Used for many years on hundreds of engines where bolt/stud goes into water jacket from stock to full blown race engines. Never a leak! In the 80-90's it was the standard in NASCAR to use on valve cover gaskets so you would never have a leak.
Cheers
Tony

Dave Castle · 04-02-2019, 08:05 PM

Permatex high performance Thread Sealant # 56521.

Tinker · 04-03-2019, 12:11 AM

Is some anti-seize out of question here for non race motors? Not a true sealer but makes the bolts come out and gumms up the water flow. I don't know though.

flatheadmurre · 04-03-2019, 12:31 AM

Jess you want sealing and threadlocking...with anti-seize the studs will come out any time you want to remove the head...
I use loctite pipethread sealer...has a fixed torque rate...meaning it holds the stud but not in an absolute irongrip if you want to remove it.

Tinker · 04-03-2019, 12:42 AM

Hey Murre, thank you. I at least know, anti-seize changes torque values. Just curious, something like perm gen1# indianhead or anti-seize is bad. Just curious.

flatheadmurre · 04-03-2019, 05:47 AM

Permatex nr1 is hard setting so works great in that aplication.

04-02-2019, 11:50 AM	#1
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 11,604	What is the best head bolt thread sealer ? Years ago I used FEL PRO Gray Bolt Prep # GRA2. It was the best. Now it's no longer being made. Contacted Permatex and they recommended ULTRA GREY TORQUE GASKET MAKER # 82194. https://www.autozone.com/sealants-gl...ker/306563_0_0 I am dubious. What do you folks recommend for thread sealer flathead head bolts? Thank you. JIM Last edited by 19Fordy; 04-02-2019 at 12:17 PM.

04-02-2019, 05:23 PM	#4
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,600	Re: What is the best head bolt thread sealer ? A good grade of teflon pipe dope is what I have used for years.

04-02-2019, 07:02 PM	#5
Talkwrench Senior Member Join Date: Aug 2012 Location: Perth, Western Australia Posts: 2,706	Re: What is the best head bolt thread sealer ? Brian put me on to Loctite 577. lookin' good so far.. __________________ *"Came too close to dying to stop living now!"*

04-02-2019, 07:26 PM	#6
KiWinUS Senior Member Join Date: May 2010 Location: Charlotte NC KiWi-L100 available here Posts: 3,262	Re: What is the best head bolt thread sealer ? Sponsored Links (Register now to hide all advertisements) 3M 8001 weatherstrip cement Used for many years on hundreds of engines where bolt/stud goes into water jacket from stock to full blown race engines. Never a leak! In the 80-90's it was the standard in NASCAR to use on valve cover gaskets so you would never have a leak. Cheers Tony

04-02-2019, 08:05 PM	#7
Dave Castle Senior Member Join Date: Jun 2017 Location: Carmel, Ca Posts: 284	Re: What is the best head bolt thread sealer ? Permatex high performance Thread Sealant # 56521. __________________ "If you do not want to hear the answer, don't ask the question!"

04-03-2019, 12:11 AM	#8
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,063	Re: What is the best head bolt thread sealer ? Is some anti-seize out of question here for non race motors? Not a true sealer but makes the bolts come out and gumms up the water flow. I don't know though.

04-03-2019, 12:31 AM	#9
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: What is the best head bolt thread sealer ? Jess you want sealing and threadlocking...with anti-seize the studs will come out any time you want to remove the head... I use loctite pipethread sealer...has a fixed torque rate...meaning it holds the stud but not in an absolute irongrip if you want to remove it.

04-03-2019, 12:42 AM	#10
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,063	Re: What is the best head bolt thread sealer ? Hey Murre, thank you. I at least know, anti-seize changes torque values. Just curious, something like perm gen1# indianhead or anti-seize is bad. Just curious. Last edited by Tinker; 04-03-2019 at 12:48 AM.

04-03-2019, 05:47 AM	#11
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: What is the best head bolt thread sealer ? Permatex nr1 is hard setting so works great in that aplication.