The changes in temp could be the result of low coolant. First, you need to know where the leak is coming from. To do that, you need to pressurize the cooling system. There is a special pump you can rent or get at most parts stores. It attaches to the radiator where the cap is and you can then pressurize the system and look to locate where the leak is coming from.
Once you do that, let me know what you find.
Tuesday, April 16th, 2013 AT 6:55 PM