I can't get my plug out. I have soaked it for several days with liquid wrench and still nothing. I guess will have to remove the sensor. So how does removing the coolant temp sensor do the same thing as removing that plug?It is a 5/16 Hex.
That plug is still available thru Mopar as it is still used on the Jeep 3.7L and 4.7L
The part # is 6034331.
It is still a good idea to remove the plug when draining as this will allow the block and heater core to drain completly.If you cannot remove the plug then you can accomplish the same thing by removing the coolant temp sensor.
if theres much air in your coolant you will see things like temp gauge spiking up and down, heat from heater core being sporadic...If I dont care about a FULL drain, heater core etc do I NEED to vent the system???
I avoided the stuck plug situation by replacing it every 2 years when i do the thermostat and drain and refill.It is worth the $3.00 investment and I keep extra's at home.