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Old 11-25-2012, 03:45 PM
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dc_wright dc_wright is offline
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Mein Auto: '96 328iC, '04 325Ci
Quote:
Originally Posted by BustedE36 View Post
person #2 started the car and held the throttle at 2k-2.5k RPM.
This is why you needed so much extra coolant. When you run the engine while you are bleeding, the water pump aerates the coolant when the system is partially filled and then it takes a lot more coolant to bleed out the mixed in air.
Everyone thinks you have to run the engine to open the thermostat to get the system bled but the thermostats come with either a small bleed hole or a dimple in the valve to allow air to bleed by. This is why the thermostat has an orientation arrow so that you install it with the bleed vent at the top. That's why you have to add the coolant very, very, very slowly.
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