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04-02-2019, 11:50 AM | #1 |
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Join Date: May 2010
Location: Coral Springs FL
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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, 04:01 PM | #2 |
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Location: North Pole, Alaska
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Re: What is the best head bolt thread sealer ?
Aviation permatex
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04-02-2019, 04:33 PM | #3 |
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Location: Bonita, CA
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Re: What is the best head bolt thread sealer ?
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04-02-2019, 05:23 PM | #4 |
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Join Date: May 2010
Location: Oshkosh, Wi
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Re: What is the best head bolt thread sealer ?
A good grade of teflon pipe dope is what I have used for years.
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04-02-2019, 07:02 PM | #5 |
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Join Date: Aug 2012
Location: Perth, Western Australia
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Re: What is the best head bolt thread sealer ?
Brian put me on to Loctite 577. lookin' good so far..
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04-02-2019, 07:26 PM | #6 |
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Location: Charlotte NC KiWi-L100 available here
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Re: What is the best head bolt thread sealer ?
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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 |
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Location: Carmel, Ca
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Re: What is the best head bolt thread sealer ?
Permatex high performance Thread Sealant # 56521.
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04-03-2019, 12:11 AM | #8 |
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Join Date: May 2010
Location: MN
Posts: 7,053
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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.
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04-03-2019, 12:31 AM | #9 |
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Join Date: Apr 2015
Location: Sweden
Posts: 3,045
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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 |
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Location: MN
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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 |
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Re: What is the best head bolt thread sealer ?
Permatex nr1 is hard setting so works great in that aplication.
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