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Farmall M Stuck oil ring

J

Jim R

Member
I recently bought a Farmall M. It doesn"t smoke blue smoke like an oil burner, but is using oil. I"ve done a compression test and all cylinders have 100 to 110 lbs. of compression. Only 10% max. difference if I put oil in the cylinders. It starts and runs fine. Oil pressure is good but does drop a little after the engine gets really warm, especially at an idle. It sat for a while and a friend suspects I might have a stuck oil ring. I have changed the oil once and it was pretty dirty. The new oil got dark right away like the inside of the engine might be a little dirty. If I do have a stuck oil ring, what is the best way to get it unstuck? Or does anyone have any suggestions as to what to check for, other than tearing into the engine? I was getting light colored smoke from the exhaust just intermittantly and I re-torqued the head and that seemed to cure that problem. The inside of the valve cover was a little dirty, like the oil wasn"t changed often enough. I love to tinker with old tractors like this but am not a "mechanic" so forgive me if I sound dumb! (lol)
 
You didnt elaborate on how much oil it is using, but a stuck oil ring is a good guess. Kind of a common problem for engines that sit awhile. If, in fact it is a stuck oil ring, there is no 100% sure cure that I am aware of. Over the years, I've had the best luck with...1.Giving them a good tune up. 2.Making sure they have a good thermostat so the engine runs right up to temp. 3. Changing oil and filter, replacing oil with a high detergent diesel oil. (15W40 Rotella) 4. Putting the tractor to work for a few hours.
 
Qiuckest way to clean it up is to pull the oil pan off and clean it out, then fill with detergent oil. Keep a close eye on oil color and change when it gets dark.
 
Run Seafoam in the gas. When not in use pull the plugs and squirt ATF in the cylinders. Between the two you may loosen up the oil control rings.
 
You should take it out and work the snot out of it
and see if that helps. You may need to pull the pistons and do a rebuild if it doesn't improve. Hal
 
Add a quart of transmission oil to your engine oil and then run her good for a couple hours. It will also clean out your engine in which you may need to drop the pan and clean the pickup screen.
 
Thanks to all you guys for your replies and help! It"s great to have this website and be able to tap into all your knowledge, I Really Appreciate it!! Jim
 
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