Foster Posted July 22, 2015 Share Posted July 22, 2015 I have 92 Geo Tracker, 1.6 Lt. 5 speed. Last fall I replaced the head since then the vehicle won't warm in the winter (even with cardboard covering the radiator, the needle never goes past 1/4) and runs too hot in the summer, I have to keep the heater on. I've replaced the thermostat twice and just replaced the water pump, no change. (the old water pump looked just fine. I checked the temperature at the thermostat (with infrared thermometer) when it is running hot, on top of the dome it reads 194 and at the bottom of the thermostat 234. The lower rad hose is considerably cooler 164, the radiator cap reads 145.. I've checked all the lines that carry coolant and they seem to be connected properly. I've also check the thermostat in a pot of boiling water and a candy thermometer and it opens at around 180. I am completely baffled, if anyone out there has any ideas please post them. Thanks in advance Quote Link to comment Share on other sites More sharing options...
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