My temperature gauge is showing that my engine is running extremely hot. The radiator is full of water, the water pump seems to be functioning properly, because I can see waterflow through the radiator with the cap off, and after about a 45 minute drive this afternoon (in 90 degree heat), the radiator cap was pretty much cool to the touch.
The temp gauge won't drop below the red, and it does move when I rev the engine.
I'm sure my water temperature is not that hot. I know what an overheated engine does, and this engine is not running poorly and there is no coolant overflowing from the radiator.
Is there a sensor that feeds the temperature gauge? I need to know how to get started.
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Re: Dash Temp Gauge reading extremely hot
You need to pressure test the cooling system. If it holds pressure, I would look at replacing the water temp. sensor. If it doesn't hold pressure, you have a coolant leak going on. If you don't see it dripping on the ground or inside the car, I would be suspecting head gasket problem.
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Hi Bill, is the engine actually getting hot enough for the fans to come on? if the engine does have overheating problem (but you say the temp gauge reads normal) then i would check the operation of the engine temp switch, there are two, one for the gauge and one for the fans.
While it doesn't seem likely, if you've changed, or had the thermostat changed.... I'd say you got a faulty thermostat. I am curious as to what your temperature gauge says the temperature of the engine and coolant is.. If your gauge is showing hot, I can think of two more possibilities... the water pump isn't pumping right... and, if the water pump isn't working right, the problem can be a cracked head or block, which can cause an airlock in the coolant system. Check the coolant or radiator cap.
Double check the thermostat and make sure the water pump is doing its job. To check the thermostat, simply take it out and reassemble the housing with out the unit. Run the engine and hopefully it will get warm to hot. If not check the pump.
it could very well be a bad gauge. when it shows the engine to be overheated or at the least very hot, check the actual temp at the water outlet where the upper radiator hose attaches to the engine. use a non contact thermometer to check the temp so as not to get burned in the process. if the thermometer reads way different than the gauge, the gauge is bad.
Well the first question would be what does the temp gauge on the dash show after you have run the engine for 5 or 10 min ? If the gauge is in the middle of the temp range the engine is getting hot and either the heater core is stopped up or you have a problem with the blend door under the dash. If the temp gauge is staying around the cold mark the thermostat is not closing to warm up the engine. I am assuming the radiator is full of coolant.
fans came late on those car,like 212 and second fan comes on at 224,you reprogram it to come a lot sooner,,other thing is there might be gunk inside the block,and coolant has hard time to pass through,and staying longer than enough in block temp goes high,even tough the radiator is doing it's job,it is just coming out block lot hotter than it suppose to be,and gauge read the block not the radiator
The overheating could be a stuck thermostat, or a failed water pump among other things. If you are loosing coolant faster than the leak on the hose, you may be burning it out the exhaust pipe. Which would point to engine problems. If the temp gauge is not showing the engine is hot, and the fan is not coming on, what you are smelling may only be the drip blowing onto the exhaust pipe. The engine may not be running hot. A mechanic would use an infered thermometer or a scanner to "read" the engine temp to verify it is overheating. There is a chance the system is not actually full and has air pockets in it which would need to be bled out.
How do you know it gets hot? Are you going by the temperature gauge on the dash? Or have you checked under the hood and found out the engine really is running hot? ...Reason I ask is, something just doesn't sound right in your description. After just 5 minutes from starting and driving away, the engine would not yet be at normal operating temperature. That would explain the heater not yet warm. But the temp. gauge says hot? If so, I would replace the temperature sending unit on the engine. the one for the dash gauge, and see if that was the problem-not reading the temp. accurately. Couple of other things: Are you sure you got all the air out of the coolant system? Start the car with the radiator cap off and let it run until the engine is warmed up fully, then shut it off and install the cap. Does your reservoir tank stay about half full where it should be, between the full-hot and full-cold marks? If your problem persists. I would have the coolant system pressure tested, and see if you could get a true temperature reading of the coolant when it seems to be running hot. Good luck.