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Thread: replaced brushes in starter motor

  1. #1
    Join Date
    Jan 2020
    Location
    taunton somerset
    Posts
    1
    My Cars
    BMW Z4 2003

    replaced brushes in starter motor

    Hi Guys

    My Z4 2003 SMG auto/maual developed a faulty starter motor , so took it out and replaced the brushes , bench tested and all ok, put it back in and all ok

    reason for the post is :
    before when ever i pressed the open button on key fob the z4 doors would open along with this pump sound that continued for about 5 seconds, and i had to press the brake pedal to start car, now no pump sound and i dont have to press brake pedal to start anymore ?
    also the glove compartment between the 2 seats never unlocked and i never worried about it, now it unlocks when doors are not locked so great, but as said cant understand whats happened,


    car starts great better than ever, starter has much more speed as before was sluggish then stopped completely , brushes were worn out.
    but just worried about the different procedure

    no wires have been left off so cant understand it, also what is that pumping sound anyway that i used to have ?
    have taken car on 5 mile journey and all ok
    look forward to any reply's thank you

    John
    Last edited by johnsquibb; 01-18-2020 at 12:24 PM.

  2. #2
    Join Date
    Sep 2018
    Location
    Mechanicsburg, PA USA
    Posts
    123
    My Cars
    2003 2.5 BMW Z4
    Your electrical system (computers) may, over time, developed program issues.

    I'm guessing you disconnected the battery to do the starter? If so, perhaps your electrical systems reset itself to factory when you reconnected the battery.

  3. #3
    Join Date
    Oct 2012
    Location
    Victoria BC Canada
    Posts
    380
    My Cars
    2004 Z4, 1700 Nomad MC
    The pumping sound is the fuel pump bringing the system up to pressure...

    I have a manual so I have to press down on clutch pedal for starter to engage....


    Sent from my iPhone using Tapatalk

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