Ok, here's what happened. Last week, hot day bubbling overflow tank, very high engine temp -- replaced thermostat. Topped off coolant with
50/50 anti-freeze. Problem solved.This week, check engine light comes on, error code P0128 - thermostat rationality(?) problem. Saw that the overflow tank was low, topped it off to the fill mark. OK, cleared the error code by disconnecting the battery. Everything's fine then tonight, engine light comes on again, P0128 error code again! Levels are fine, car runs a little cooler then normal I guess, but it was pretty cool today.
No water in the oil. Tested thermostat - works fine. Upper hose is ok not rock hard.
ANY IDEAS?
JaKe