Car was overheating now the temp gage does not move off C
I have a 2002 Oldsmobile Alero that my wife drives. She said it was over heating going up to almost hot but when she put the heat on the gage would drop to half way. I checked the fuild levels which were ok. However the heat of the car does not get hot just blows cold air. I checked the car today and now the tepm gage does not get off of the C and it still does not blow warm air. I had to add coolant to it today. and that still did not correct the problem. Is it my head gasket or is it something else?
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Re: Car was overheating now the temp gage does not move...
Try flushuing the system and replacing the thermostat first, then if the problem persists have a shop do a test for a leaky head gasket, but do the easy cheap stuff 1st, only makes sense to me, how about you?
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check the real value of the temperature sensor with a scan tool. Compare it withe the value in the gauge. It can be a defective temperature sensor or a damaged gauge...or else the car is really overheating
TEMP GAUGE SHOULD STAY IN MIDDLE.IF ITS MOVING UP A LITTLE CLOSE TO RED.CHANGE THERMOSTAT AND RADIATOR PRESSURE CAP MINE RELATIVE CAR DONE THE THE SAME.I REPLACED THEM BOTH -.WARNING IF ITS YOUR FIRST TIME LET A GARAGE DO IT BECAUSE YOU GOING TO HAVE TO TAKE THROTTLE BODY OFF.TO GET TO THERMOSTAT.THEN COOLANT SYSTEM IS GOING TO TO BE BLEED.TO KEEP ENGINE FROM OVER HEATING.IF YOU BEEN USE TO WORKING ON CARS. ALL IS GOOD.
I think you started out looking in the right places. Replacing the coolant, thermostat, relay and sensor are all fairly inexpensive.
I believe you either have blockage in the system (especially if you're using tapwater), or your water pump may be failing.
I would first either take it to a radiator shop and have them flush the cooling system out thoroughly, or else pick up a chemical flush kit and do it yourself. This involves more than just drain and refill.
If this doesn't work, your next step will probably be replacing the water pump. At almost 200k miles, it's probably about due anyway.
When you say not leaking antifreeze has your coolant level gone down at all? and is it that you have seen no leaks where you park it? What worries me is you can smell it when warming up, have you felt the interior floors to see if damp and do you get any condensation if put blower onto screen, if so then heater matrix is leaking if not could be down to headgasket and/or cylinder head leak.