355 coolant change procedure

Discussion in '348/355' started by WATSON, Sep 4, 2013.

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    WATSON F1 Rookie
    Rossa Subscribed

    Sep 9, 2010
    Any tricks in draining and refilling the cooling system for the 355 5.2 cars?

    I see there is a bleeder screw on the top of the water elbow above the thermostat. Does this need to bled out or do the return hoses to the burp tank handle the air discharge?

    Thanks in advance for any experiences or advice.
  2. spider348

    spider348 Formula Junior
    Silver Subscribed

    Nov 3, 2003
    Full Name:
    Watson, My brief coolant change procedure:
    1. Remove underside trays to allow access to radiators and block.
    2. Open expansion tank cap.
    3. Remove plugs. Drain both radiators.
    4. Remove plugs. Drain block both sides.
    5. Install both radiator and block plugs with new “o” rings and copper washers.
    6. Pump system down with my AirLIft system. Check system holds vacuum.
    7. Fill system using the AirLift system. No air pockets or purging needed using this tool.
    8. Using my wife’s turkey baster, remove coolant from expansion tank to correct factory level.
    I use BMW’s coolant product.
  3. Dave rocks

    Dave rocks F1 World Champ
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    Nov 23, 2012
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  4. yelcab

    yelcab F1 Veteran

    Nov 29, 2001
    San Carlos, CA
    Full Name:
    Mitchell Le
    The 355 is self bleeding so no need to remove any bleeding screw. Just run it, and continue to fill up the coolant to the right level. Check the next day and top up.
  5. AVMotorsport

    AVMotorsport Karting
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    Mar 11, 2004
    Full Name:
    Alex V
    #5 AVMotorsport, Sep 5, 2013
    Last edited by a moderator: Sep 7, 2017
    I downloaded this document somewhere in FChat (I think) many, many years ago, and have done countless coolant changes using the steps that are outlined, with great results.

    HTH, YMMV.
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    WATSON F1 Rookie
    Rossa Subscribed

    Sep 9, 2010
    Awesome. Exactly what I needed and worked perfectly.

    Major brotherhood points for you!
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  8. bcwawright

    bcwawright F1 Veteran

    Jul 8, 2006
    Full Name:

    Perfect and spot on John...THANKS

    WATSON F1 Rookie
    Rossa Subscribed

    Sep 9, 2010
    OK. I did breakdown and buy an airlift system. The reviews are very good. I have never heard of it until now.

    I already have the turkey baster :)
  10. Badabing!

    Badabing! Formula Junior
    Silver Subscribed

    Mar 30, 2014
    Is it possible to use the Airlift system (or some other tool) to evacuate the system?

    In other words, suck out all the coolant so you don't have to bother with all the steps necessary to drain the coolant the traditional way?
  11. johnk...

    johnk... F1 Veteran
    Silver Subscribed

    Jun 11, 2004
    Short answer, no.

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