WATER IN THE OIL

[quickt]

I bought a used 94 K2500 HD with a 6.5TD. I noticed when I changed the oil that it wasa milky so coolant is in the oil. Change oil checked about a week later and again coolant in the oil. I changed oil again and put some stop leak in and now about 1000 miles and no coolant loss at all. What could it be? I have been told a cracked cyl. but there is no way I think that bars leak would stop water leak from cracked cyl. Any ideas?

Lonnie

[92gmc]

I've seen the same thing, turned out to be the oil cooler in the radiator leaking, though you should see oil in the coolant too.

Otherwise could be a head gasket or cracks in the head into the coolant passages