A thermostat won't cause loss of coolant unless the engine is overheating. The first thing I would do is have your mechanic perform a chemical test to see if a cylinder head gasket is leaking. That only takes a few minutes. The test involves drawing air from the radiator through a glass cylinder with two chambers partially-filled with a special dark blue liquid. If combustion gases are present, the liquid will turn bright yellow.
Once the head gaskets are ruled out, we can look at causes of running hotter than normal if that becomes necessary.
SPONSORED LINKS
Thursday, January 22nd, 2015 AT 3:42 PM