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Overheating, fans working ok. No blockage around the radiator.

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That sounds like the engine thermostat is stuck closed.

Posted on Aug 09, 2008

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My 99 grand am is overheating. I changed the thermostat and it still over heats. what else can cause it to overheat?


How hot does it get in degrees F? Does the radiator fan work? Some fans won't turn on till about 220 degrees F.
Could have blockage in radiator or engine block? Check the water pump. Your serpentine belt ok? Could be gasket issues? Any coolant in the oil or oil in the coolant. Check your coolant temp sensor. Don't replace anything unless your testing points in that direction. Are you losing coolant?

Nov 04, 2016 | 1999 Pontiac Grand Am

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Overheating! The van has new radiator, fluid, cap, heavy duty water pump, tsat, fan clutch. BTW the heads were redone not to long ago.


Did you change the thermostat? If not opening properly or far enough, that could be the cause of your overheating.

Use heater full blast with windows open to add additional cooling till you locate the source of the problem.

Sep 08, 2016 | AC Cars & Trucks

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2002 Chrysler Concorde 2.7 L overheating, changed, thermostat, water pump, air intake gasket and still overheating


When you changed these components and refilled the cooling system, did you purge the air out of the top of the system by opening the bleeder valve. These engines have coolant in areas higher up in the engine where air can be trapped during refill. Air trapped in the system will cause overheating issues. Otherwise, the only thing you haven't mentioned in the system is the radiator and fan assemblies. They could be suspect, as could a possible blown head gasket.

Oct 24, 2015 | 2002 Chrysler Concorde

2 Answers

Radiator overheating


If the overheating is only occasional, it sounds like the radiator still has some blockage that moves around and plugs up again. Try flushing it backwards again. If it continues, consider a new radiator. A radiator is cheaper than head gasket work, which may happen if it keeps overheating.

Nov 30, 2012 | 2002 Mitsubishi Montero

1 Answer

Replaced thermastat but still overheating


OK, you have addressed the first possibility. There are a few more, each progressively more expensive to fix. First, are the radiator electric cooling fans operating? If you find the vehicle runs ok on the highway, but overheats around town in stop-and-go traffic, it could be that the fans are not running. Quick check for the fans - with the ignition on (the engine doesn't need to be running), move the cooling control to the A/C position. If the fans come on, they are good, but you could still have a fan-related cooling problem. If the fans don't work, you have a problem. If the fans worked, the car runs fine at highway speed but not in town, then suspect the coolant sensor that engages the fans. If the fans work and the car overheats in all conditions, then a system blockage is possible. Blockages occur usually one of two ways: Radiator rust/corrosion, and collapsed radiator hoses. Radiator corrosion will require radiator replacement; if it is blocked badly enough to overheat, flushing it is a waste of effort, and could cause more problems with all the **** you circulate into the engine. If the system is low on water (air in system) it can rise to the top radiator hose and cause it to collapse partially or fully, restricting flow. Some engines have water jackets that extend higher than the radiator cap, so they can trap air. These cars have bleeder ports at these locations to remove to trapped air. Check to see if that is the problem.

Dec 17, 2011 | 2001 Chevrolet Lumina

2 Answers

I3My high roof minibus of the 2002 just developed overheating now I have no clue the cause I need help. This is very reliable bus which just arrived from a very long distance two days ago


see the radiator fan does it work when the engine is hot
there are two things
if the fan is not working check it by attaching it direct current from the battery
if it works late see the thermostat
check the radiator for any blockage

Feb 10, 2011 | 1987 Toyota Land Cruiser

1 Answer

1998 Pontiac Sunfire Symptoms: -Overheating


What are you going by to say it's overheating , temp gauge ? Have you test to see what the actual temp. is > Hook - up a scan tool ,what's the PCM - engine computer seeing for engine temp. ? 223 degress the PCM should turn on the cooling fan . You could buy a Non-Contact Infrared Thermometer With Laser Targeting at harbor freight ! Radiator very hot ????? What is the right temp .
Non Contact Infrared Thermometer With Laser Targeting

Could be a bad temp gauge . Is the coolant surging inside the cooling system ? Does it have a radiator cap ? Have you replaced it ?

May 06, 2017 | 1998 Pontiac Sunfire

3 Answers

1997 dodge neon. replaced coolant temperature


1997 Plymouth Neon, have replaced radiator, radiation cap, thermostate and hoses, still run hot. Fans do not seem to come on, where is the temperature sensor on this vehicle?

Aug 05, 2009 | 1997 Dodge Neon

2 Answers

Car began overheating, so we added antifreeze and water. Then the next day, it all leaked out. Upper hoses appear to be ok. Are there lower hoses?


It should have a lower hose also. Or you could check around the water pump, they have a weep hole on it and they usually leak if the pump is bad.

Jul 09, 2009 | 1991 Ford Tempo 4 Door

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