2510 coolant in oil

I noticed the oil level up a quart on my 2510D. Dumped the oil and the first thing out was a quart of pretty green coolant. Oil not milky in the least. Pretty amber color. Head gasket? This tractor has never been run hot. 1500 hrs on rebuild.
 
I second the bad liner seal,, the early 2510's needed the bore chamfered a bit before you installed the new liners,, some one probably skipped that part,,Darn it...it is rarely a head gasket..
 
Probably cylinder and possibly block
rotted out. Remove the oil pan and
you can see which is leaking.
 
If it is original, that is common. Original sleeves only have one seal. New replacement seals have three. Big difference in durability.
 

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