Posted by RBoots on April 04, 2020 at 11:04:09 from (173.241.113.101):
In Reply to: Dire need of assistance posted by joshua.monroe0601 on April 04, 2020 at 10:18:33:
I'm not a JD mechanic for the most part, usually IH stuff, but I've done a fair amount of work on 2 Jul JD's, and of the 4 or 5 M and 40 tractors I've worked on, I've had to replace the head itself due to cracks in the runners in the head, I can't remember if it was the intake or exhaust runner. These weren't my tractors, so I don't know the backstory, I just know they were filling the crankcase with coolant just like yours. I'm not saying it isn't a headgasket, just informing you on my experiences with the ones I worked on. On the ones I did, I pulled the spark plugs and looked in the cylinder, I could see the antifreeze hanging off the valve in whichever runner was cracked. To be sure on each of the tractors, I took the manifold off, and rigged up a coolant pressure tester to the radiator. I didn't pump it up much, maybe 5 pounds, but it was enough to see the coolant coming right through a crack between the coolant jacket and the runner in the head. I'm not sure anymore, but 10 or 15 years ago, it was easy to get a NEW head for an M or 40 tractor, and they weren't terribly expensive. You'll want to get it taken care of before it wipes out the bearings in the bottom end. Good luck on it, you'll be able to get any help you need on this site, a lot of knowledge here.
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