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Sudden smoke -- update

R

reb-in-pa

Member
Doesn't look like it's going to be a quick fix. The air filter cup isn't overfilled and making oil get sucked into the cylinders (dang). Checked the crankcase oil level, and all was normal, so the hydraulic system isn't dumping into and overfilling the crankcase (double dang). Pulled the plugs and found two, three, and four were dry. Number 1 was soaked. With a flashlight, I can see oil on top of the cylinder, but no scoring on the 20 percent or so of the cylinder wall that I can see. I'm rooting for a hole in the piston rather than busted rings.

Here we go. . .
 
Well we often find through eliminating the inexpensive possible, that the issue is deep. Children are often like that. Best of luck. If it were a hole in the piston, there would not be the "running well" situation you described in the original post. A broken ring doesn't always score the cylinder. Best of luck, Jim
 

Not very likely there is a hole in the piston because those pistons are very thick and tough. Next to impossible to actually get one to break when trying to remove from a stuck engine.
 
Do a cylinder leak-down test to determine the source of your troubles.
Tear-down without testing can lead to many $$ spent un-necessarily.
 
With both valves closed (TDC compression stroke) with the tractor in High gear, and brakes locked.
Air pressure (100psi or so) is put in the spark plug hole, and one listens to hear where the air leaks out. Air cleaner, oil fill hole, exhaust, radiator, etc. (yours will be more than likely from the oil fill hole) It won't tell you if it is a cracked piston, hole in piston, or broken ring. It will just confirm the need to pull the head and get a visual of the piston. It has wet sleeves which are easy to remove. JimN
 
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