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i have a 97 gt and i replaced the water pump and the themostat and radiator fan but the temp guage keeps going all the way to the h. The temp will then go back down to the normal range and will do the same thing over again under normal driving i was wondering if anyone had any suggestions on how to fix this issue thanks in advance
Is the cooling fan operating properly - as in, does it come on at like 180-190° or so, or does it not come on until the gauge reading indicates a near overheating condition? Also verify that it comes on when a/c or defroster is on; it should stay on constantly when the a/c compressor is running.
The second one is what it sounds like may be happening.
2001 GT Convertible
All the usual bolt-ons 1967 Coupe
200 I6, C4
Check that the fan works on both high AND low speed. Sounds like the low speed fan is NOT working. Easy enough to confirm by running the fan directly from battery. There should be an obvious difference between the low and high speed.
Remember for the GT, the low speed fan runs when the AC is on. The high speed fan runs when the motor temp rises above the HS fan set point or the AC high head pressure switch is tripped.
2003 GT Convertible (sold)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.