I've been chasing an overheating problem forever now. The car is actually not overheating but continually runs hotter than its supposed to. I have a '98 Mistu GST Turbo with 89k. I've replaced pretty much everthing in the coolant system at least once. New radiator, waterpump(w/20k on it now) 2 oem thermostats and oem rad cap, and both temp sensors(gauge and ecu) and confirmed fan comes on once operating temp has been reached. The needle normally runs right in the middle of gauge and now runs 2/3 to 3/4 up gauge. I pulled the first oem thermostat and drilled 2 small holes, which helped and it only ran slightly hotter than normal. Then I purchaced a new 2nd oem thermostat and it runs hot again about 3/4 way up gauge. Also, once it does start running hot I can push in clutch and coast and temp immediatly drops to middle of gauge and then if I put back in gear it jumps right back to where it was. If I leave it out of gear and coast, it will drop down but slowing climb back up to 3/4 of gauge. Please help!
Monday, February 21st, 2011 AT 1:49 PM