Engine in car will not turn over but car never runs hot
I have changed the sensor on the top of the manifold and the one in the radiator, I have even replaced the battery. The car never runs hot but if you drive 65mph on freeway or make 3 stops turning off the engine each time at the 3rd stop car will not turn over until you raise the hood and let it cool off for about 15 min/and 45 min if you don't raise the hood. The temperature gauge never goes above a half.
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Re: Engine in car will not turn over but car never runs...
If this car has a distributor, maybe check inside of it. If you can see a round plastic disc in there with a metal tab attached to it, this might be the problem. It's a pick-up coil. When these go bad, the heat from the engine makes them shrink and the tab cannot conduct electricity that is sent to your plugs. Mine was $40 on my truck. Hope this helps.
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could be or the thermostat getting stuck check your cool in fan motor too and sensor it all works in conjunction any if the radiotor is bad you should replace the thermostat .good luck.hugos1915 @live.com.
Try disconnecting the sensor. then turn on the ignition switch and see what the guage dose. If it still goes to the top, chances are there is a short in the wiring. If it does nothing, chances are you have a defective sensor.
The classic cause of this is a head gasket leak to the coolant jacket, which will cause quick overheating.
You may see white bubbles in the coolant like dry ice, if you start the car from cold, allow the temp gauge needle to just move off the stop, then remove the radiator cap by grasping it through a large towel spread wide on top. Look then down the radiator neck while the engine runs and warms up.
There is a simple test for combustion gases in the coolant, which your local mechanic can do.
1.check coolant level---must open bleed valve above thermostat when adding coolant.
2. Are fans radiator fans running when car ovrheats & is air comming off of radiator hot?
3. Check/Replace thermostat.
4. There is a plastic elbow that connects from the intakke manifold to the engine block on the passenger side of car that arrre notorioous for cracking / leaking....
5. The heater core on `05 Impala does not close when heater is turned off so does not benifit overheating by turning heater on.
The Engine Temp. sensor is bad. it is under the intake manifold. if there is a miss also check under the coils over the spark plugs. If there is Coolant in the spark plug holes .then the intake gasket is leaking. The intake manifold needs to come off to change the coolant sensor. When off look for corrosion on the cylinder head at the coolant port. If there is corrsion then the cylinder head must be replaced.
Is it possible the replacement engine has a water pump that turns the opposite direction from the original ? The thermostat has to be open to allow flow thru the radiator, have you tried running without a thermostat to check flow ?
You need to diagnose the problem. The fan is doing what it is being told to do by the computer. You stated the temp gage on the dash is in the HOT position. Either the engine is very hot and the fan needs to run to remove heat even after it is shut off or the gage, coolant sensor or temp sender is defective. Try running it temporarly without a thermostat and see what happens, you may have bought a defective thermostat.