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John Deere g head gasket

L

Le9102011

Member
Hello. I have a 1947 GM that i have completely torn down the engine and rebuilt. Today it started weeping water into the left cylinder when I let
it sit for a couple of hours. It will start on one cylinder and I leave the petcock open on the trouble cylinder and will run on one cylinder till the
water is out then pop it runs on both with no water coming out just exhaust and no white smoke coming out of the exhaust after it starts running
on both cylinders. I have retorqued the head twice and used blue devil block sealer after I rebuilt it to make sure I didn?t miss anything. There
isn?t any oil in the coolant nor is there any bubbles in the radiator while running or starting. I really don?t want to have tear down the engine
again I?m hoping it may just be another retorque. It was flooding out with gas when I let it sit but I did disconnect the plug wires to get all the
gas out of the cylinders before i started it.
 
I took the valve cover off and retorqued all the bolts. Started to move the nuts at about 175 foot pounds and retorqued all of them to 210 foot pounds. Still stumped as to why one cylinder had water and the other didn?t.
 
Might try changing to a John Deere gasket with metal on both sides. I had the same problem on my D with an aftermarket gasket. Changed to a John Deere gasket, no more problem.
 
I,would 100% agree with you on that, but the jd gaskets for a g are not available anymore and with .90 over pistons the gaskets I got from Ytmag and Steiner don?t look like they will hold up for more than a season of shows parade etc and I don?t want to keep pulling the head off every year spells disaster for the head studs. If you know of a nos or somewhere I can get the proper head gasket (and exhaust gasket) that would be awesome.
 
The head the tractor came with had cracks in it and I replaced it with a mag and pressure tested head and the block was mag aswell when it was board.
 
Put a Murphy's head gasket in it. Murphy Motor Sports from MO. does a lot of engine work for JD pullers and his gaskets are good. We've even reused them numerous times with no problems.
 
OLSON GASKETS Are the Best. Make sure manifold studs are not leaking. Original studs are oversize on the end that screws into head. Get hold of Henry at H&J Machining 701-652-3289 he has the correct studs.
 

I hate those Lead washers JD provides, but if you place a thin HARDENED Washer over the Lead, you can torque easier and more safely (not as many Sharpe shrouds to avoid..

I ALWAYS use a "Running Torque"..that is, engine at FULL Saturated operating temp and RUN each nut until you get the correct "Torque"..

What you really are measuring is the Stretch of the Head Bolts and that cannot happen, until those Bolts are HOT all the way to the engine Block...

Then, if it does seep, RUN it, USE it, the Head will settle down and seal...
 

Helped install a really Large Press... at the called for Torque, it boounced and raised um-Heck..!!

Turned out, the anchor bolts were to be Heated RED HOT to a height of 6 Feet, then torqued..!!
 
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