water pump/ radiator
3 Answers
Could be a number of things, should go to a shop and have the system pressure checked for the leak if you don't see where it is coming from.
Best Answer
Mark helpful
Thank you, But you would think it should be the opposite. I should lose more coolant when I run the heater, But I don't lose any.
When having it pressure tested, if it is leaking, you will see it somewhere. If it was leaking into the cylinder because of a head gasket, then either the oil will funny or over full or you will see a lot of white smoke coming out the exhaust.