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Thread: Bleeding coolant

  1. #1
    Join Date
    Jan 2018
    Location
    Denver, Co.
    Posts
    37
    My Cars
    1995 M3 Coupe 2005 X5

    Bleeding coolant

    I am just kind of curious about what happen to the excess coolant after you bleed the system. I have read you fill up the expansion tank (e36 m3), until coolant comes out the bleed screw then warm up and rev to 2000 now and then until the bubbles stop. If you are several inches above the cold mark on the expansion tank is the system quite overfilled. In fact it cannot hold anymore coolant at all. Where does it end up going? I don't think you need to reduce the coolant back down to the fill line after bleeding do you?

  2. #2
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    Coolant expands(rises) when heated, contracts(recedes) when cooled.
    This is the reason for an expansion tank (expansion/contraction).
    Last edited by MIKYZZ4; 02-19-2018 at 02:34 AM.

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