sealing head gasket on damaged block

sgtbull · Sep 27, 2008

Working over a Farmall 200. Head gasket was blown, head was .020 out of flat. Had it surfaced and valves redone. Where the coolant leaked from the water passages to the cylinders, there is a wee bit of pitting. Not all the way to the edge of the sleeve, but pretty close. What is the best means of sealing the new headgasket, short of pulling the block and having IT surfaced? I"ve heard copper coat, aluminum paint, fill and finish the pits w/ jb weld, and all sorts of other advice. Who has had the same problem and did something that WORKED?

old · Sep 27, 2008

Copper coat and 2 head gaskets is the only thing I can think of that might work short of having machine shop work done
Hobby farm

Mike Farmer · Sep 28, 2008

A coat of oxide primer on head and block sufaces then use an "instant gasket liquid"(instead of any gasket cement) again on both surfaces before placing the head gasket and head in place. Don't waste too much time before tightening the head down. If you ever have to remove the head again don't expect it to be easy. Best of luck MTF

Anonymous-0 · Sep 28, 2008

I dont see any reason why JB wouldnt work as the gasket will seal around the sleeve and how can the repair get away as the gasket will seal it in place. I like to use HI-TEMP AL paint using several coats on the gasket.

John G. Hasler · Sep 28, 2008

I successfully repaired a pitted manifold with "Devcon Metal Patch And Fill" (JB Weld should do as well). I just applied a thin coat and sanded it down until the pits were filled flush with the undamaged surface. May take several coats.

Anonymous-0 · Sep 28, 2008

dont forget to retorque

Red Mist · Sep 28, 2008

SgtBull: I have successfully fixed this type problem many times with a high-temp epoxy glue. The exact product I used was from an Evinrude-Johnson dealer and was designed for gluing flywheel (stator) magnets into the inside of flywheels on the 200-225-250 hp V-6 outboards.
Smear some on the top of your block, press the gasket into it, place the head into place and torque away.... I don't see why JB weld wouldn't work just as well. Good luck. mike

Janicholson · Sep 28, 2008

I vote for this solution. JimN

Dan L · Sep 28, 2008

go to an engine parts specialty store and get a compound called belzona. I think that we get it from engine parts warehouse. It is similar to j b weld but it actually has metal in it. it is made for repairing things like this. you just smear it on and then wait for it to dry and sand it smooth. the compound is actually harder once dried than your block is

GA Dave · Sep 28, 2008

Clean it good and use JB Weld. David.........

dave guest · Sep 29, 2008

Have used Permatex with success aviation form a gasket.

sealing head gasket on damaged block

sgtbull

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old

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Mike Farmer

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Anonymous-0

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John G. Hasler

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Anonymous-0

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Red Mist

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Janicholson

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Dan L

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GA Dave

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dave guest

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