Sealing Head Studs

David G · Nov 12, 2015

What do you guys use to seal studs or head bolts that go into the water jacket?

My dad always used Indian Head sealer.

Ted in NE-OH · Nov 12, 2015

Permatex gasket cement

Steve@Advance · Nov 12, 2015

I've used a variety of sealers over the years, but been using automotive grade silicone for head bolts. Put it on the threads and under the bolt head.

For high heat, like exhaust manifolds, I use the liquid Teflon pipe thread sealer.

David G · Nov 12, 2015

The reason I am bringing this up is that I replaced the original head studs on my MH44 with ARP studs and they leaked. It seems that those studs have a huge issue with leaking. I do not remember the OEM studs ever having issues with leaking. They recommend cleaning all oil off of studs, then applying their sealer. The head must be installed and torqued down as soon as possible. This seems pretty hokie to me.

Bob · Nov 12, 2015

I use pipe thread sealing paste with teflon, and sometimes anaerobic gasket maker/flange sealant, which is basically thick Loctite.

I haven't had a leak that I am aware of with either.

bison · Nov 12, 2015

I use a couple wraps of teflon tape on the bolt/stud treads.
I never had one leak yet.

TGP · Nov 13, 2015

Permatex high temp. thread sealant.
Comes in squeeze tube or can with brush.
It's white like pipe dope.
Highly Recommend.
Tom

Mike M · Nov 13, 2015

Loctite makes a product for studs.

EFV · Nov 13, 2015

Betting your problem isn't with sealer you used but
the ARP studs. There is a thread on Pulloff.com currently
about fastener suppliers. Seems ARP has a quality control
problem,you're not the only one having trouble. Good luck
getting your project back on track,look forward to reading
the updates.

John Deere D · Nov 13, 2015

Loctite 567:

I use this product on all VINTAGE equipment that has a STUD/BOLT entering and or coming in contact with the water/coolant passages.
I've been totally successful on all 2 cylinder JD Engines, FLATHEADS FORDS, and several gasoline engines used in FERGUSONS.
I used this product on all STUDS and fittings that entered the COOLANT passages on the 4000 HP NORDBERG and 9000 HP CLARK/DRESSER RAND V-16's.
Bob...

Dieseltech · Nov 13, 2015

Curious as to why the original Continental studs were replaced, that's one area I've never had trouble with..

1948CaseVAI · Nov 13, 2015

I see on thecounterfeitreport.com that ARP has reported finding fake APR bolts and fasteners for some applications.

David G · Nov 13, 2015

One was stripped, I have a spare set now, thinking of going back.

What do you seal them with?

Dieseltech · Nov 13, 2015

Have an old bottle of Permatex I use on studs that enter the water..

mj · Nov 14, 2015

(quoted from post at 19:56:40 11/12/15) What do you guys use to seal studs or head bolts that go into the water jacket?

My dad always used Indian Head sealer.

#2 Permatex

Sealing Head Studs

David G

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Ted in NE-OH

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Steve@Advance

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David G

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Bob

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bison

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TGP

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Mike M

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EFV

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John Deere D

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Dieseltech

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1948CaseVAI

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David G

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