Question about 1990 GMC C1500
MAKE SURE WATER PUMP WEEP HOLE NOT LEAKING.IF SO REPLACE IT.MAKE SURE YOU HAVE 50/50 MIXTURE OF ANTIFREEZE AND WATER.MAKE SURE YOUR COOLING FAN IS WORKING .IF YOU GOT A CLUTCH FAN IT SHOULD NOT BE LOOSE OR FREE WHEELING.IT SHOULD HAVE RESISTANCE WHEN YOU TURN IT BY HAND.IF YOU GOT ELECTRIC COOLING FANS TURN ON AC SWITCH TO SEE IF THEY COME ON IF YES FANS WORKING IF NOT COOLING FANS RELAY IS BAD.ALSO SCAN IT TO CHECK COOLANT TEMPERATURE SENSOR.TOO SEE IF MATCHING THE ENGINE COOLANT TEMP IF NOT REPLACE IT.IT WILL CAUSE YOUR COOLING FANS NOT TO COME ON AT A SET TEMPERATURE.CAUSING ENGINE TO OVER HEAT.. .
Posted on Jul 27, 2009
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Posted on Jan 02, 2017
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