How do you get an airlock out of a cooling system?

Answer 1

It depends on what car it is, the hardest cars what i think to get air lock out are BMW and there are common problems first start with car being on tilt, jack the front end of the car up or park it on a hill this will make the air come out faster, keep the car running and taking any bleed screws out as well fill the water to the top then keep added water if u can try to rev the car to about two and half thousand 2.5k RP it just pushes all the air out with pressure, keep added more water to it until all the bubbles have gone, if there is too much back pressure sounds like a knocking noise then switch the car off and try it after 5-10 mins let the water cool down then repeat it again there should be less pressure, if there are no bubbles tighten the bleed screw wait 5 mins then check that heater is blowing out heat if it is then that a good sign that there no air lock in the in the system if everything goes well tighten the bleed screw keep added water to the tank and keep checking that the heater still giving out heat If all is well and good, that means you have now taken all the air out the system.