Replacing spark plugs

Where exactly is this vent on a 2012?

 

It was here:

wider view:



Close up:



In later model years, the main component is still there, and the same hoses connect, but the white cap is gone, which you could turn to allow air or coolant to flow through the spigot on the side.

 

Thanks for sharing the pictures @Mendel Leisk.

 

Yes, if your car has that valve and you want to use it, you can, and it will behave as described.

Toyota later decided there was no need for it, or any of that related business in the instructions, and the later gen 3s still can be filled with coolant.

 

I have never done anything on my 12v's coolant drain and fills other than leaving the reservoir cap loose during the initial warmup.

Trapped air is not a problem unless combustion gasses are entering the pressurized system.