Hi, anyone knows what this T screw is for? Grand am SE 2.2 ecotec thermostat housing.

T screw? Do you mean the sensor? What year?
 
Sorry, its next to the temp sensor.
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I believe you are referring to a cooling system bleed screw.
 
Bleeding valve. Could be. Thank you for your in put. The car is overheating with a new thermostat, new water pump and new radiator. I will try to open that valve and try to bleed the air out. Thank you again
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Robert R said:
Bleeding valve. Could be. Thank you for your in put. The car is overheating with a new thermostat, new water pump and new radiator. I will try to open that valve and try to bleed the air out. Thank you again
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Do the engine fans run when the car is overheating?
 
melsg5 said:
Do the engine fans run when the car is overheating?
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Yes, it does, no thermostat and runs cold no matter distances or time. Thermostat back in and overheats again. Changed thermostat 3 times (brand new).
 
Two things, you are definitely installing the thermostat the correct direction? If you have a drill, drill a small 1/16" hole in the flat edge of thermostat to allow any trapped air to pass.
 
melsg5 said:
Two things, you are definitely installing the thermostat the correct direction? If you have a drill, drill a small 1/16" hole in the flat edge of thermostat to allow any trapped air to pass.
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Hi, yes thermostat installed as directed by the book. Thank you and for sure i will try to drill a hole in the thermostat to see the f works. Thank you again.
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Robert R said:
Hi, yes thermostat installed as directed by the book. Thank you and for sure i will try to drill a hole in the thermostat to see the f works. Thank you again.
Click to expand...
melsg5 said:
Two things, you are definitely installing the thermostat the correct direction? If you have a drill, drill a small 1/16" hole in the flat edge of thermostat to allow any trapped air to pass.
Click to expand...
three months with a small hole in the thermostat and the car is running at 100 to 120 degrees, the check engine light came on and the hot air conditioner stopped working. I find out that the T screw is a plastic valve with a internal spring to regulate the water passing from the motor to the heater core. At list its not overheating anymore ...
 
Robert R said:
three months with a small hole in the thermostat and the car is running at 100 to 120 degrees, the check engine light came on and the hot air conditioner stopped working. I find out that the T screw is a plastic valve with a internal spring to regulate the water passing from the motor to the heater core. At list its not overheating anymore ...
Click to expand...
Interesting but the engine is running way too cool, should be at least running at the thermostat temperature.
 
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