the heater is underneath the dash board you have to take apart a lot of stuff to take it out. what kind of engine air leak.
Rarely do you find a bleeder valve on the heater. If there is one, it will be located on the highest point of the heater core connections from the engine. You can bleed the heater by turning it to hot and starting the engine. Use the bleeder valves on the engine or remove the radiator cap and run the engine until no more air bubbles are escaping. This should bleed all air from the heater core.
Just drained my coolant on a 1998 and had a hard time getting air out. I ended up filling degass tank almost to top idling engine for a short time . Then let engine cool and add more coolant had to repeat this procedure several times before heater would continue to blow warm air. Jeff
steering systems do not need to be bled, the air will be cycled out and into the reservoir.
To bleed the heater in a Chevrolet Impala, start by ensuring the engine is cold and the coolant level is adequate. With the engine running and the heater set to maximum, locate the heater core bleed valve, usually found on the engine side of the firewall. Open the valve to release trapped air until a steady stream of coolant flows out. Close the valve, check the coolant level again, and top off if necessary to ensure proper circulation.
On 3.9L engines1. Remove the engine fill cap.2.. Open the heater air bleed.3. Add coolant to the degas bottle allowing the system to equalize until no more coolant can be added.4. Replace the degas bottle cap.CAUTION: Care must be taken to ensure the accessory drive belt does not become contaminated with engine coolant.5. Add as much coolant as possible to the engine fill. The heater air bleed will remain open.6. Replace the engine fill cap.7. NOTE: The heater air bleed remains open.Start the engine and turn the heater to MAX position.8. Close the heater air bleed when a steady stream of coolant comes from it, during engine idle.9. Allow the engine to idle for five minutes, add coolant to the degas bottle as needed to maintain the cold fill MAX mark.10. Reopen the heater air bleed to release any entrapped air and close again.11. Maintain engine speed of 2,000 rpm for 3-5 minutes or until hot air comes from the heater.12. Return to idle and verify hot air is still coming from the heater.13. Set the heater temperature setting to 24? C (75? F) and allow the vehicle to idle for two minutes.18. Shut the engine off and allow to cool.19. After the engine has cooled, add coolant to the degas bottle to bring the level to the cold fill MAX mark.
Here is the procedure from the factory service manual:1. Remove the engine fill cap.On 3.0L engines2. Open the engine air bleed.On all engines3. Open the heater air bleed.4. Add coolant to the degas bottle allowing the system to equalize until no more coolant can be added.On 3.0L engines5. Close the engine air bleed when coolantbegins to escape.On all engines6. Replace the degas bottle cap.On 3.9L enginesCAUTION: Care must be taken to ensure the accessory drive belt does not becomecontaminated with engine coolant.7. Add as much coolant as possible to the engine fill. The heater air bleed will remain open.8. Replace the engine fill cap.On all engines9. NOTE: The heater air bleed remains open.Start the engine and turn the heater to MAX position.10. Close the heater air bleed when a steady stream of coolant comes from it, during engine idle.11. Allow the engine to idle for five minutes, add coolant to the degas bottle as needed to maintain thecold fill MAX mark.12. Reopen the heater air bleed to release any entrapped air and close again.On 3.9L engines13. Maintain engine speed of 2,000 rpm for 3-5 minutes or until hot air comes from the heater.14. Return to idle and verify hot air is still coming from the heater.On 3.0L engines15. Maintain engine speed of 1,500 rpm for 3-5 minutes or until hot air comes from the heater.16. Return to idle and verify hot air is still coming from the heater.On all engines17. Set the heater temperature setting to 24°C (75°F ) and allow the vehicle to idle for two minutes.18. Shut the engine off and allow to cool.19. After the engine has cooled, add coolant to the degas bottle to bring the level to the cold fill MAXmark.
Hi,U need to find a heater connection that supplys water to heater,it is found on the top of engine,between the heater control unit & engine,its a large tube like a radiator hose,on top of the that is a bleed screw,its actually in the hose,u may have to feel around for it,but thats the bleed point,just unscrew it a bit & water should trickle out,but b careful its very small,so take care,ALB Keithy
Pry loose one of the heater hose connections at the entry to to the heater core while the engine is cool. Re- connect. Run the engine to operating temp. with the heater temp on high. Slightly open the heater hose to let coolant and air out. Do several times and check the inside temp.
start the engine . on the heater /open the radiator cap until see the anti freeze coolant flowing circle
Doesn't have any. The system should self bleed.
Follow the top rad. hose to the engine. It's in there. Drain the rad first. When refilling the rad. fill almost to the top, and before starting the engine losen one of the heater hoses at the fire wall, then start engine with the heater in the car on full, check fluid and fill and slowly losen the heater hose to bleed the system of air. Check the fluid level and heat when engine reaches operating temp. if good, job is done. If still a little cool inside the car, then bleed a little more and check and fill the rad.
its used to bleed air out of cooling system,theres another one near the bulkhead where the heater pipes go into the car!