I've been doing maintenance on a buddys '07 explorer with the v6. I went to check the radiator and it had a lot of pressure after loosening the cap. This was after it sat overnight. I changed to coolant so I've been trying to purge the air, but it won't draw from the expansion tank.
Sound like a new cap is in order? Why wouldn't the pressure equalize overnight?
Sound like a new cap is in order? Why wouldn't the pressure equalize overnight?