What is involved in bleeding radiators?

Answer by  bug57 (1048)

Drain the radiator using the bolt at the bottom. Replace the bolt, and fill with new coolant. Run car with radiator cap off until coolant is hot/no bubbles.

Answer by  Doug77 (1433)

Add coolant until it's at the top. Start the engine and rev the engine to roughly 1,200rpm. Keep topping the radiator up as the fluid lowers. When you get a good heat out of the vents inside it means the thermostat has opened. Fill the reservoir to the "Full" line.

Answer by  Amber40 (24961)

All you need to to is top off you radiator and run the engine with the cap off. Wait a while and then top it off again later.

Answer by  Amber40 (24961)

Usually you all you need to do is open the radiator or reservoir and let the engine run. The air should slowly bubble out. Add in more coolant as need. Once the thermostat has opened and no more bubbles come out then it is bled.

Answer by  kennethjgoodson (4903)

Most radiators have a petcock on them right at the bottom on the right hand side. All you have to do is open the petcock and drain it into a bucket. Start the car with your garden hose in the radiator and then close the bleeder to fill it up.

Answer by  Allstar (2071)

Drain radiator, fill with coolant. Roll down windows, turn heater on full hot. Start engine without radiator cap. Keep pouring fluid in as it takes it down until it stops.

Answer by  Grag (452)

There should be a plastic bolt at the bottom right or left of the radiator that needs unscrewed. once done replace screw tight