thermostat confusion

I have a 2013 Tacoma with the 4.0 V6 engine. I am doing a coolant change, along with hoses and thermostat. I bought a Toyota thermostat, part#

$50 16031-0P010 TOYOTA Genuine Parts - Inlet Sub-Assy, Wate (16031-0P010)

16031-0P010, and this has the integrated housing. Everything I read says the jiggle pin should be at the 6 o'clock position, however Toyota has it at the 12 o'clock position. Which is correct?
Thanks,
Ron W.

 

It's primary purpose is to allow any air that is behind the thermostat to escape so ideally you want it to the top.

 

12 o'clock

 

I know on the 2.7L it is 12 o'clock, but I could have sworn I read 6 o'clock for the 4.0L.
Ron W.

 

I do it at the top. Because air floats. And that’s where the air should be. The FSM doesn’t specify for the 2nd Gen trucks.

I believe the 1st Gen trucks had a recommended position. That’s probably where the position you are referring to comes from.

When in doubt, I usually put stuff back the way it comes out.

 

I was also under the impression it needed to be this way on the 4.0. As others have stated, air will rise to the top in the coolant system so having that jiggle valve at 12o’clock is allowing the air bubbles to get past the t-stat and prevent air pockets in the system

 

Thanks guys for the responses. I have no idea how I got confused but I will blame it on "senior moment".