Is there any way that the water can mix with the oil because of water pump damages by freezing what are all the problems that could be what.

Okay, I purchased the vehicle listed above from a man he told me that he forgot to put antifreeze in the vehicle. When he went out to crank it the next morning the water pump was squealing and burnt the belt off because of being Frozen with water. Whenever it's thawed out he replaced the water pump replace the belt he says but now there's water getting in the oil, it is not overheating as long as there's plenty of water in the water reservoir you can drive it up and down the road it's no Miss no smoke no indication other than water getting mixed in with the oil. I'm wondering if it froze and blew the head gasket or to crack the head possibly to allow the water to mix in the oil or if it could be something with the water pump and the water pump housing. I don't know if there is an oil galley behind one of the bolts that goes through like on the old Chevrolet model pickup trucks that had a one bolt that went straight into the oil jack to the water coolant jacket you know and it could actually get through the bolt hole and mix with the oil any help would be appreciated.