hot water heater question
I just bought a 1983 Catalina 30 and the previous owner had removed the hot water heater. (Don't know why, but I would assume it was bad and he didn't want to replace it.) Anyway, does the lack of a hot water heater effect the engine cooling? I have a Universal diesel, and a friend of mine said that some engines use the heat exchanger in the hot water tank as part of the cooling system. If I need to put a new hot water heater in, what are some suitable replacement brands, models, etc. Any help is appreciated.