Thermostat just won't open

It may be an o-ring or gasket?
I can’t say I’ve ever seen on stopped up?
But it’s possible I guess?

 

PLEASEEEEE!!!!! Tell me you reached a conclusion with this and have a confirmed fix. Everything youre dealing with is exactly what im dealing with.

 

Welcome to TacomaWorld
He hasn't logged in for 6 months.

 

Yeah I knew it’d be a long shot.

 

Reading this and I hope everyone with a 3.4 isn’t putting the “jiggle” thing at the 6 o clock position. Air rises so that confuses the hell out of me to be honest. But most likely not a properly bled system to cause issues like that or incorrectly installed thermostat.

Edit* Yes I have read that it goes at the 6 o clock position, it's just weird to hear that, that's all. I'll believe the FSM and you guys over my thoughts lol so disregard what I said about the "jiggle" valve.

 

My thoughts are either airlock or backwards stat.

If the stat isn't backwards, I would refill coolant but do it by pulling a vacuum instead.