My son bought a used 2001 pathfinder a few months ago and over the weekend it overheated on us.

I thought ‘thermostat’ so we replaced it pretty easily. It still overheated, so initially I thought water pump.

We ended up figuring out there is a bleeder valve at the top rear of engine and yea sure, it could be some air in the lines so we opened that up and ran it. Eventually it started to spit more and more coolant and less air out of that valve, so I put the cap back on and the heater started blowing hot air. Took it for a test drive and it overheated again. Pulled the bleeder cap and it just spewed air and steam.

I no longer think it’s the water pump, but am kind of out of ideas, anyone else have one?

It’s a VG35DE engine in a 2001 Nissan Pathfinder XE 4x4 3.5 V6.

Airborne pathfinder for your time.