How do you "Burp" the cooling system (3S GE)?

I think i got it....bad radiator cap!!!!!

-if its allowed to leak a small amount of air back into the system youll never be "burped". the super heated air/steam will be hotter than the coolant. iirc this was one of my first issues with 09. and i had some wierd issues because of it. go grab a new one!!!!

 

jwagner has a point. the radiator cap seems to give me trouble from time to time. when it's not doing it's job i get air in my upper rad and rad hose and my temps go just a little past halfway, when i see my temp gauge like this i simply fill it up, then it will stay at below middle!

 

yep, so if you have a bad cap and you warm the motor the fluid expands. when the motor cools itll pull air in. when you go to re-start from cold you would then have air in the system. i suppose it could also pull air in during certain conditions while at operating temp.
-like i said before any air in the system will be super heated steam. anytime air went through the water neck you and the ecu would get high readings that could cause a whole host of issues.

-2 more things. make sure you do "burp" the system properly once you have the new cap, and treat it as youve just replaced the coolant....so keep toping the overflow tank. the other thing check the hose to the overflow tank, the tank cap and hose inside of it. make sure the hose isnt connected to the wrong side of the cap or pluged up or has holes.

-pretty sure this will get you there.

 

^ another method of 'burping' that works for me is putting the cap on maybe halfway, then squeezing the upper hose continuously, it acts as a vacuum to get coolant from the overflow tank, just make sure that the coolant bottle is full!

 

I don't think so, I have bypassed the sensor and fan switch and run my fans constantly.
If your computer was going into limp mode I would have to guess that your check engine
light would be coming on so if the bulb is good and your not getting a check engine light
then I don't think your ECU is going into limp mode.

 

just wondering, did you change the cap?

-sorry i feel like where failing you. something like this is super hard to diagnose via the internet. from only your above description and not the whole thread i would think maybe an injector issue. youd have enough fuel at cold start, once the cold start shut off youd be "missing" on 1 of the cylinders. which ever has the bad injector. this would also cause temp issues on a single cylinder but i wouldnt think it would be immediatly seen on the gauge.....maybe if it was cylinder 4???

-i would say you should test the resistance of the injectors to see if there electrically sound.

-are you able to take a pic of your spark plugs for us?

-it could even be a combo of things. say the alt is starting to go so all the gauges "surge" with revs. and you have a "mis" from a bad injector or plug. i know ive had plugs that look brand new but dont work.

 

Well you've allready tried 2 thermostats and also tested them in a pot of water so I
will go back to my page 1 suggestion and once again highly recommend removing the
thermostat totally so that you are guaranteed that the thermostat is or is not the problem

 

Yup, remove the thermostat and go from there.


I know this will sound simplistic and obvious but when you eventually find the issue, make sure the radiator overflow bottle is at the proper level and make sure the overflow hose is in good nick and long enough so that when the engine cools it can suck back the overflow with minimal air intake and fluid to spare.

 

Sounds like your radiator is blocked - take it out and flush it properly
Also check for cracks and see if it's leaking under pressure

 

If your rad is blocked I can guarantee the heater is too, you will need to run radiator flush before flushing the entire system aggresively with a hose

 

your car is so weird! i'm guessing as soon as your discovered the a/c "fix" you've tried to drive it hard? if the temps have been stable with a/c on and driving really hard, then it sounds like you're really close to sorting this out. it would have to be electrical for sure...fan-related?

even better, drive without the A/C on, let the temp creep up past halfway, then turn on the A/C and see if it comes back down.

 

All non JDM auto's are ECT, shouldn't be hard to find.

Best is to borrow an IR gun and compare the temps to what the gauges are saying, I've had dicy gauges before - usually it's only one so easy to diagnose.
The speedo, oil, water, fuel, volt gauges are common to all models so those you can take from any car.
Some have yellow needles and others are orange, try to keep them the same

If gauges are acting up in pairs I'd be inclined to suspect a faulty earth somewhere in the dash harness