Alright guys what could cause my Tacoma to do this:

https://www.youtube.com/watch?v=qg4BuFaHqWc

I parked it and heard a hiss, saw this under the hood. Checked the temp gauge and sure enough it was hot.

I was alone in the wilderness so I had no choice but to limp it many miles to where I could get a tow. I kept it cool when limping by keeping the heater on full blast and stopping every couple miles to rest it and top off the radiator with water I had in the truck. I think I was successful because the heater stayed hot the whole time (never went dry) and the temp gauge stayed normal the whole time, never even started to creep up other than when I noticed it initially. I still have no idea what is causing what you see in the video though.

Starting the engine would actually cause the boiling to stop in some cases. What you see was typically only happening with the engine off.

 

Looks like head gasket issues

 

Or your radiator cap is not holding pressure.

 

I don't think it is a head gasket as the engine isn't running in the video...

 

Well dude it's over heated.
Fan clutch
Water pump
Thermostat
Radiator issues- clogged- bad cap- fucked up in general
Head gasket
If head gasket isn't the cause beware because over heat will result in blown head gasket

 

Like Jimmyh said no way it's a head gasket, it bubbled several minutes after engine shut off.

I did find this though. I only wish I knew where the rest of that cap went.

 

Ahh true. Overlooked that small detail lol

 

It happens. I've also seen turbo cars that only leaked when on boost. Still most likely a plugged radiator.....no guarantees. Hot running is hot running, can be anything.

 

It's probably in your cooling system may have jammed your thermostat and or water pump. I'd take it apart.
Also don't rule out a head gasket or cracked head/ warped head dude that bitch looks hot

 

It cannot get out of the radiator as I think the suction is on the bottom and the return is on top.

 

I agree, that missing piece is likely at the bottom of the radiator. I'd replace the radiator/cap and thermostat while you're at it and go from there. Use an OEM/Aisin t-stat, radiators are cheap on rockauto, like $75 for a Denso. You could leakdown test it to rule out head/gasket issues.

 

pressure test

 

So I did a little googling and learned that a 50/50 coolant mixture at 15 PSI (typical cooling system pressure) boils at around 260 degF, but at atmospheric pressure boils around 223 degF. Quite the difference. This tells me that with a failed cap not holding any pressure she doesn't really have to get that hot to start boiling all the coolant off, which is what I saw. This gives me a little peace of mind but I'll definitely be taking it apart to finish the job.