model a upper casting sealant

redd1974

New User
does anybody know the best sealant to seal up mounting upper water casting to the block? I just put new gasket in it and it leaking I cleaned both surface thanks
 
I have had some of the bolts bottom out on there and the its still loose. Take a look and make sure the lock washer is squish were it come together. I have had some that the bolts are shorter then the others and I believe them go on the side that the pipe is coming out to be able to get them in.
 
Is the leak from the gasket or from around the cap screws?

If it's from around the cap screw(s) AND your A is serial number 635656 (late 1949) or greater there's
supposed to be a copper washer under the heads of the 2 FRONT cap screws to prevent leaks. Regular lock
washers are only used on the 2 REAR cap screws.

The front cap screws are 1-1/4" long and the rear are 1-1/2" long.

The copper washers, p/n A3105R, are still available from John Deere.
 
(quoted from post at 13:15:30 03/20/18) Is the leak from the gasket or from around the cap screws?

If it's from around the cap screw(s) AND your A is serial number 635656 (late 1949) or greater there's
supposed to be a copper washer under the heads of the 2 FRONT cap screws to prevent leaks. Regular lock
washers are only used on the 2 REAR cap screws.

The front cap screws are 1-1/4" long and the rear are 1-1/2" long.

The copper washers, p/n A3105R, are still available from John Deere.

It leaking from gasket. I'll check out about the bolt.
 

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