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1959 Case 211B Piston Ring Replacement

D

DB1991

Member
Hi everyone,

I finally got the tractor running right.

https://www.youtube.com/watch?v=U9weTVwVqoM&sns=em

I know I have low compression in cylinder 3. I did a dry test before the winter and that showed:

Cylinder 1 - 132 PSI
Cylinder 2 - 126 PSI
Cylinder 3 - 110 PSI
Cylinder 4 - 130 PSI

Doing a wet test on cylinder 3 got it to come up to 125 PSI.

Now, when the tractor is running, there is a lot of exhaust gas coming out of the oil fill cap on the top of the tractor. I am certain this is blowby past the rings from #3. I am wondering, is it impossible to replace the piston rings without pulling the engine?

If it is possible, my plan would be:

1. Rotate engine until #3 is at TDC
2. Drop the pan
3. Pull the head
4. Tap the piston out, see if it only needs rings, or a new piston, sleeve
5. Reassemble

I am wondering if this process is possible, or if the engine needs to be pulled to have any chance of getting the #3 piston out. If the engine needs to be pulled in order to replace them, I am probably going to ride it out until the engine needs a full rebuild, or let the next owner take care of it.

Thank you!
 
you dont have to pull the engine out of the tractor to do that, you can do it just as you described. Back when these tractors were built most
engine rebuilds were done that way with the block never coming out of the tractor.
 

I would leave it alone. Having 110psi dry and 125psi wet is more than enough compression. You'll only be wasting time and money trying to fix a nonexistent issue. The steam/vapor coming from the breather is most likely moisture being venting out of the crankcase after the engine is warmed up.
 
Please don't take this the wrong way, but in reviewing your questions and procedure outline, I suggest you buy a service manual for your tractor and study it. Several considerations go into determining what could be the problem, if there is a problem. Those engines did not have any sophisticated crankcase ventilation system, and all the gasses were vented thru the fill cap, and maybe the amount of gasses escaping are normal. As for #3 cyl., if the tractor has been sitting, the compression could come up just by using the tractor. Maybe some fuel additive is in order.
Good luck and we are here to help.
 
What's the condition of the oil. Could it be possible the oil has become diluted with fuel from missing on some cylinders or running rich.
 

DB1991,
I viewed your YouTube video that shows your tractor running. I'd say you couldn't make that engine run any better. It sounds like all four cylinders are running as smooth as they possibly could. Put the tin back on and put the tractor to work. :)
 
Awesome. I just wanted to know what I have to do in the worst case scenario that the rings need to be replaced.

I will put it to work and hopefully it stays running. Thanks everyone for the info!
 
(quoted from post at 19:19:42 04/10/18) Awesome. I just wanted to know what I have to do in the worst case scenario that the rings need to be replaced.

I will put it to work and hopefully it stays running. Thanks everyone for the info!
Click to expand...

Unless you work the tractor hard every day for the next fifteen years you most likely won't have to overhaul the engine as long as you will own it. Change the oil spring and fall and oil filter every other time you change the oil. Keep the oil in the oil bath air cleaner clean, and make sure you use clean non-ethanol fuel. Putting a can of Seafoam in the gas tank a couple of times a year will help prevent any carburetor troubles in the future. It will also help keep carbon deposits from building up in the combustion chambers.
 
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