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Thread: Bleeding the radiator

  1. #1
    Join Date
    Jun 2004
    Location
    Cardiff UK
    Posts
    42

    Default Bleeding the radiator

    The radiator gave up on my 520i, so I fitted a new radiator, topped up the coolant and bled the system as described in the manual and a number of threads here.

    No luck the engine was badly overheating and no coolant flow through the heater, classic air-lock in the heater. I tried the conventional bleeding a few more times without luck.

    I then used the technique that I used to use with my previous 525i:

    Allow engine to cool
    Remove hose from one of the heater control valves
    Using a funnel add coolant through the hose
    When the funnel is full and you can't add more coolant, slowly raise the funnel until coolant pours out of heater valve
    Re-connect hose
    Allow the car to idle and warm up, checking heater warms up and temperature is normal
    Allow engine to cool and re-check coolant level

    It worked a treat - hope this helps anyone else having problems bleeding the radiator.

  2. #2
    Join Date
    Mar 2005
    Location
    Long Beach, CA
    Posts
    2,563

    Default

    Quote Originally Posted by stevebuk
    The radiator gave up on my 520i, so I fitted a new radiator, topped up the coolant and bled the system as described in the manual and a number of threads here.

    No luck the engine was badly overheating and no coolant flow through the heater, classic air-lock in the heater. I tried the conventional bleeding a few more times without luck.

    I then used the technique that I used to use with my previous 525i:

    Allow engine to cool
    Remove hose from one of the heater control valves
    Using a funnel add coolant through the hose
    When the funnel is full and you can't add more coolant, slowly raise the funnel until coolant pours out of heater valve
    Re-connect hose
    Allow the car to idle and warm up, checking heater warms up and temperature is normal
    Allow engine to cool and re-check coolant level

    It worked a treat - hope this helps anyone else having problems bleeding the radiator.
    Very creative!

    Ralph Mendoza Jr. - Long Beach, CA

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