Coolant in oil on 2630....Need Help!

BuckhornMan · Aug 5, 2018

Hey folks,
Was getting equipment ready to make hay. The JD2630 had not been run in a while. Started right up and ran well, but immediately noted leak up around T-stat area. Shut it down. Much to my dismay I found milkshake on dipstick. Drained pan.....ugh!!
Have no reason to suspect HG leak....was never over heated. Really only use it to rake/tedder. Always has started and run well.
Not clear why it seemed to leak up near T-stat, although truth be told....not clear where leak source really was.
Tried to research other causes....found one possibility ....the oil cooler O-rings. Anyone out there have any thoughts?
Sure could use some assistance in getting pointed in the right direction.
Thanks in advance!

pmsmechanic · Aug 5, 2018

It could also be something as simple as condensation in the oil pan. If a motor has been sitting for a while, especially outside I like to crack the oil pan plug just to see if any water runs out.

If you have a coolant pressure tester you could pressurize the cooling system and then without refilling the oil see if you get coolant coming out of the oil pan.

You didn't specify what was leaking around the t-stat area. Is it oil or coolant?

You could fill the tractor with oil and see if the new oil looks like "milkshake" after a while. That would confirm or not if you have a coolant leak.

Another place for coolant leaks is the rubber rings at the bottom of the cylinder liners. I've also seen cylinder liners with holes cavitated into them from the coolant not being changed regularly.