What are all the possible ways for water to get into the oil? This is a 2014 rzr 800 S with 193miles.

Both cylinders have good compression and hold compression on a leak down test. It does not smoke but coolant is mixing with the crankcase oil somehow. I have changed the oil several times and it continues to happen. The rzr has never been in any water. I did have an overheating issue right after I bought it new that was caused by the water pump impeller nut coming off preventing the impeller from spinning. Advice?

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