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antifreeze in oil

the most common (unless you know it froze) is leakage at the Orings at the bottom of the wet sleeves. These Orings harden and get scale in them over 60 years+- and leak. They are located in a groove in the lower block, and touch the bottom machined surface of the sleeve.
Pulling the oil pan off, and watching with good light at the bottoms of the sleeves might be the first diagnostic task. It is the least invasive. If coolant is coming down on the cam side of the block, it could be a cracked head, or head gasket. If dripping at a sleeve, the Orings. Jim
 
Had to replace the head gasket on C-175 in H a month ago. Replaced the head a year and half ago. I never noticed the copper rings were not in the water passages on the new gasket, the material between the metal shell pushed out and was leaking antifreeze into cylinders. So check your gaskets before installing.
By the way it was a FelPro gasket.
 
I also agree with Jim. I'd pull the oil pan and then lay a piece of cardboard in it and watch for drips of antifreeze. That will tell you which sleeve is leaking if it is the seal seals
 
Head gasket is probably bad, or somehow the sleeves are leaking. I?m only 15 and don?t know much but I bet it?s one of the two.
 
If it's the head gasket, the head has to come off and you'll be able to see what's going on then. If it's the sleeve o-rings, the head has to come off to pull the sleeves and you'll be able to see what's going on then. So, either way the head has to come off.
 
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