I need help!!! overheating after replace ect sensor.

 

If you are making that much coolant system pressure that you blow hoses off... I believe you may have a head gasket sealing issue. Quick test: After letting the car cool overnight, feel the upper radiator hose and notice that it has coolant inside and no air (top off the radiator if it doesn't) and take note of how this feels when you squeeze it. Now, crank up the car and let it idle for 15 to 20 seconds... and the squeeze the hose in the same place again. If the hose gets really stiff, you are likely pressurizing the cooling system with combustion pressure. You can run a test to see if exhaust gas is in the coolant... I believe your local auto parts store will have a test kit.

 

Get a leak down tester and pump up the cylinders to 100 psi, one at a time. Look in the rad...Do you have bubbles? If so, your head/head gasket is done. I had a Subbie with good compression check, no combustion gasses when checked, but with the leak down it was so obvious.

It's the best way to check IMHO.

Chay

 

I will try it. Man I'd be angry.. I just brought back from shopping. Built motor.. everything was fine until I replaced ect sensor.. plug was broke off so I replaced..

 

If this happened after you replaced the ECT sensor, it may still be a faulty ECT signal, or you have the wires backwards if you swapped the plug since you say it was broke! A bad rad cap can give you a hard time even over heat!