Gasket Sealant Use or Don't Use

Devon B · Jan 26, 2020

I finally got the head and pistons back from the machine shop so my daughter and I can get back to work on her AG project. While we were doing research on head gaskets, some people use a gasket sealant and some do not. I have even heard from a life long mechanic where he would lightly spray paint it and install it while it is still wet.

I want to know from the experts on whether we should use a gasket sealant on the head gasket or not.

Devon B · Jan 26, 2020

I forgot to mention it is a 1947 Farmall B 113 engine that is standard.

Rick Remmert · Jan 26, 2020

I spray a light coat of "Copper Coat" on mine. Never had one leak.

ih560 · Jan 26, 2020

Some of the head gaskets for the 113/123 engines require sealant and are labeled as such. On some of them, it will be stamped right on the gasket. I thought I had one here that I could take a picture of, but I guess I used the last one that I had.

ih560 · Jan 26, 2020

The head gaskets that are sold on this site have Sealant/Retorque Required stamped right on them. I found a couple of photos, it's right beside where it says UP. I have seen them in either place on new gaskets.

matthies · Jan 26, 2020

Coppercoat, I am sure there are some imperfections on the block surface, do it once and be done. Haven't put a head gasket on without some sealant to be safe.

SVcummins · Jan 27, 2020

I?ve heard of guys using spray paint .

DR. EVIL · Jan 27, 2020

Couple guys from the RPM forum use aluminum paint. I'd be curious what Pete23 has to say. Head gaskets
have changed in the last 50 years.

560Dennis · Jan 27, 2020

I didn?t spray my C113 with copper coat 🧥 had a small leak between 2 and 3 , not much After ,retorque got it .
It was a mahrle head gasket , I called them , about coating they would not recommend anything cause they did not make it.
Sad

Lee460 · Jan 27, 2020

Copper coat is made for head gaskets. For a few bucks a can
why would anyone not use it. I don?t understand what it could
hurt. Someone please correct my way of thinking.

rustred · Jan 27, 2020

the thing is when the head and block surfaces are resurfaced you should not need anything. also the sealant is built right into the gasket in a lot of them. you cant just say to use a spray as there is different circumstances. I have never used copper coat. I only use felpro high tack sealer on all my gaskets including the head gasket. the 282 engine is the test of that. I am sure when engines are assembled in the factory or assembly line they don't spray gaskets.

Goose · Jan 27, 2020

I've always used spray on Copper Coat on head gaskets.

It can't hurt.

jhncp · Jan 27, 2020

Some head gaskets say not to because it
already has something on it and adding
another may screw it up. Some head gaskets
have all metal on one or both sides, I would
give it a copper spray on the all metal.

teddy52food · Jan 27, 2020

I use a spray from Permatex part # 99MA.

gene bender · Jan 27, 2020

did many of those engines an used hi]temp al COUPLE COATS AND 80LBS torque

David G · Jan 27, 2020

I would spray with chrome aluminum paint or copper guard, install while wet.

JIM MN · Jan 29, 2020

Lee is correct; if this is an in frame overhaul, the block gasket surface is just cleaned up. Where the -
head gasket surface- should have been planed. So you will have some uneven surfaces. Use copper coat
spray, spray both sides of the head gasket. Torque to specs. Get running, hot engine and retorque, set
valves, good to go........

F-Dean · Jan 30, 2020

Old time method: abundant coat of Gun Grease on both sides and torque in steps - 70 fp, 80 fp, etc in a spiral from center out until you reach desired torque. Grease allows gasket to adjust to conditions.

Gasket Sealant Use or Don't Use

Devon B

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Devon B

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Rick Remmert

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ih560

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ih560

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matthies

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SVcummins

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DR. EVIL

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560Dennis

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Lee460

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rustred

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Goose

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jhncp

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teddy52food

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gene bender

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David G

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JIM MN

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F-Dean

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