Ok I searched and really couldn't find nothing to detailed so I need help.
My car has been overheating and I have no heat at idile actually it blows really cold air when I have tge heat on.the heater will work when I get up speed and the car won't overheat.
Anyway this what I did
I let the car sit overnight with radiator cap off I just woke up and topped it off with more coolant.
With the radioter cap off I started the car up let it warm up then I turned the heater on(still cold air).
Then while the cars on,heater on full blast,radiator cap still off I go and open the bleeder screw up.
I was expecting air bubbles to come out but nothing came out not even coolant so I put the cap on the radiator back on then I look at the bleeder screw and I see coolant flowing out no air bubbles so I close it back up because I was makeing a mess.
After all this my car still has no heat and I didn't drive it yet but I know it's gona start overheating.
Did I not bleed the system the right way?

 

use one of these to bleed the coolant:

 

Ok so when I'm using this
I fill it up half way with coolant
Start the car and let it warm up
Turn tge heater on full blast
Unscrew the bleeder screw and then rev the engine up to 3k for a few seconds
Right?am I missing something

Thanks

 

i take the bleeder plug off when the car is NOT running and the funnel is filled up halfway. once the bubbles come out and coolant is flowing out i plug it in and then im done. sounds like a leaking headgasket to me tho :\

 

that's pretty much it. some people just rev it a few times, but i think its better to hold revs constant at 2.5k RPMs while bleeding.

after the first cycle of bleeding, leave the funnel on the car, let the engine cool down for a few hours (make sure there's coolant in the funnel cause it will get sucked into the engine as it cools), then repeat the process again.

 

Leaking headgasket?
Why would you say that?there's no smoke and no coolant in the oil.
U scaring me man lol

 

Ok cool I'll try it

 

if bleeding it again doesnt work maybe the thermostat has gone bad....