I had a John Deere 425 lawn tractor come to me with what appears to be coolant getting into the oil. It belongs to a neighbor of mine that was hoping I would be able to fix it. He uses it primarily as a snow blower in the winter as it has a cab on it as well. What he has told me is that he has noticed the oil on the dipstick looks a little foamy and white. He changed the oil a couple times and it cleared up. But after some use he said it comes back looking like that and the level seems to be a bit higher on the dipstick. To me it sounds like a headgasket issue and I can confirm the oil on the dipstick looks a little milky and foamy. It appears to have a Kawasaki FD620D engine. I currently cant get the full model number from the engine because I have to remove the side panels and to do that I have to unbolt part of the cab which I haven't gotten to yet. Ive done some work on the air cooled Kawasaki engines, but not much on the liquid cooled ones. Is there a certain way to test/check that its a head gasket issue vs a water pump. I don't see any external leaks anywhere on the engine and the engine doesn't seem to smoke or burn any. But is it possible that these water pumps can leak internally into the crankcase too?
Any insight is appreciated, thanks
Any insight is appreciated, thanks
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