how do i blead the air out of my car radiator?

Answer 1

Run the engine, radiator cap off and the heater on and set to high.

As the coolant circulates, it will force out the air in the system. Add additional coolant as the level in the radiator drops, but do not overfill.

Shut off the engine and let the car sit until everything is cooled. Add coolant to the proper mark (cold) on the overflow tank. Make sure the radiator cap is back on. Start the car and run for a few minutes until it's warmed up, then check the overflow tank. Your coolant level should be at the "Hot" mark now, and you're all set to go.

DON'T take off the radiator cap when it's hot!

Answer 2

I'd park on a hill so that the top of the radiator is a high point, and warm up the engine fully with the radiator cap removed. Keep adding water as needed to keep the radiator full. Check your owner's manual for any bleed screws typically located near the engine thermostat housing. Turn the heater to high heat so that the coolant flows through the heater core fully. After 20 minutes or so, replace the radiator cap and drive the car making sure that the temperature gage acts normally. If not, try the procedure again after the engine cools down.

Answer 3

It varies from one model to another. When the engine is completely cold, undo the pressure cap on the top of the radiator (yes the one that says do not remove under any circumstances) and top up the radiatior from there. If you think that air is trapped in a higher point of the cooling system, you can release it by pushing a small diameter plastic pipe through the radiator header tank and up the top hose. Now replace the pressure cap and do it up tight (or you'll finish up with a cap shaped hole in the bonnet). Then check the water level in the plastic reservoir tank and top this up if necessary.

Answer 4

Most newer vehicles have a bleeder valve situated near the water pump or thermostat housing. However using these still leaves some trapped air pockets. A few companies have created a vacuum system that you attach at the radiator that sucks out the air pockets. Gates has the air lift system, runs about 90 dollars with all the attachments. If you have a shop it is a good buy, if you don't you might want to call one and see if they have one and how much they charge. From about 98 and up most vehicles have to be vacuumed out to completely get the air out or the vehicle will still overheat.

Answer 5

if air is trapped you must have a closed system. then there is a little brass(usually) valve with a slotted head screw on top and a small hole in the side. follow the upper radiator hose until you reach metal then start looking. also follow heater hoses to engine and start looking there. you don't have to remove the valve, just open it a good turn(watch out for spray) and let it run until you get only water and no air.
If you can't find it call your local auto brand dealer and ask for location of bleeder valve.
hope this helps!

Answer 6

Some cars have a blleed valve near the thermostat housing.
You can also loosen a heater hose to help air bleed out of your cooling system. Loosen the clamp and stick a thin screwdriver blade between the hose and the fitting.
Most parts stores carry a cooling system flush kit that splices into a heater hose (about $5.00) You can use it to bleed air out of the system

Answer 7

Take the bottom hose off. Make sure the heater is set to hot and flush the system through. Wait for the system to empty then put the hose back on and continue the flush until the expansion tank overflows. Run the engine and the water level should drop.

Answer 8

Keep squeezing the rubber hoses that lead to the radiator, you'll hear the air bubbling inside, then keep topping up until it doesn't bubble anymore.

Answer 9

i have always took the cap off then started the engine let the thermasat open and refill after a few times of repeating the process you will be good becareful not to get burned by hot water

Answer 10

just take off the cap and start the car.the air will come out along with some anti-freeze.