You probably still have air in the system, our cars can be a pain in the butt to bleed. Try putting the front end up on jack stands/ramps and make sure you use the bleed rscrew on the passenger side of the motor up by the firewall. It's possible the fan/s are going out but at 29K miles that would be surprising.

 

I know this old thread but really need help my car over heats and replaced thermostat and as well radiator and still same thing. I fully burp the system out of bubbles and still nothing. I need help honestly I’m think it’s a head gasket but not really sure. I would appreciate some help idk if the water pump failing but see no leaks as well coolant isn’t mixed with oil and no white smoke. Car only over heats while driving and as well when revving. Thermostat won’t open but brand new and tested that works too coolant hose gets hot and bottom one really cold

 

Possible defective thermostat? Remove it and put it in a pot of hot water while monitoring the water temperature. If defective, return it for an exchange. Where did you purchase it?


Do a compression test

 

I’m go get a test today and see

 

If the bottom hose never gets hot but the car is overheating and you verified the thermostat is actually functioning then I GUARANTEE YOU HAVE AIR IN THE SYSTEM, a large pocket of air directly behind the thermostat.

EDIT: Drain the coolant out and do it over again, this time pour it in very slowly at the rate suggested in the FSM (or slower).

Or buy a coolant airvac and use that. I did one on a 350Z last weekend, recharged (build vacuum) 3 times, basically just wait until it's sucked all the coolant upthrough the suction line, then vac it again until coolant starts to come out of the drain on the airvac, then suck up more coolant with the suction line, vac it a third time which didn't even take a full vac before it was purging coolant, suck the final remaining coolant with the suction line.

I literally had ZERO AIR to burp on that car, I should have bought one of these things a decade ago.

Here's the one I bought.

 

I’ve tried multiple times to bleed the system I’ve lifted the car and tried all the methods and nothing. I’m think of running with out a thermostat would you guys recommend or no because my car is a daily been stuck for three days bleeding and nothing.