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Water gurgling in heater coil, 2006 Legacy

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What is the best way to get the last of the air out of the heater coil?

I ran the engine for 5 minutes at 3000 rpm but that didn't remove it.

I used a garden hose to try to flush the air out, but somehow still have air in. When the car is cold, and the car is accellerated normally I can hear the gurgling noise.

Make sure you are checking the fluid level in the radiator (rad cap off) with the car engine cold.

 

DO NOT REMOVE THE RADIATOR CAP WITH THE ENGINE HOT!! YOU CAN SCALD YOURSELF!!!

 

Some just check the overflow tank. What you are describing is a certain sign of low coolant level in the radiator.

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