Question about 2003 Chevrolet Impala

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When im driving my impala everything seems okay. When im driving the temp gauge seem okay except for when im idling. It seems to go to the red not quite all the way. I added the dex coolant as suggested by the manual. I dont know if i should replace the thermostat or the radiator or change both.

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Try to replace termostat, Check fancover location and fix if it is needed. A bad fan cover let air circulation without to pass across radiator. Radiator itself must be ok (remember to service it once a year at least) due no turn hot in any other situation. check radiator cap

Posted on Oct 07, 2009

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It sounds like the temp. sender switch is kaput

Posted on Oct 07, 2009

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YOU NEED BLEED COOLANT SYSTEM.CHECK COOLANT LEVEL IN RADIATOR.ADD MORE DEXCOOL UNTIL COOLANT LEVEL IS CLOSE TO RADIATOR SPOUT.CRANK ENGINE LET IDLE UNTIL TOP RADIATOR HOSE GET HOT.WATCH TEMPERATURE GAUGE.IF TEMPERATURE GAUGE START RISING TO HOT ZONE.TURN OFF ENGINE.LET COOL DOWN.USE LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL ALL PRESSURE RELIEVED.REMOVE RADIATOR CAP.ADD MORE COOLANT.CRANK CAR AGAIN LET IDLE UNTIL TOP RADIATOR GET HOT.KEEP EYE ON TEMP.GAUGE ALSO.WHEN TEMP.GAUGE STOP CLIMBING.YOUR COOLANT SYSTEM BLED.WHEN DONE LET CAR SET A WHILE CHECK COOLANT LEVEL.ALSO FIRST THING IN THE MORNING CHECK COOLANT LEVEL AGAIN.AND BESURE ADD COOLANT IN THE OVERFLOW JUG TO THE COLD MARK.DONT OVER FILL THE COOLANT RESERVOIR JUG.WORK SAFELY DONT GET SCALDED.

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