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Thread: overheating problems 89 525i

  1. #1
    cal Guest

    Default overheating problems 89 525i

    I put in a thermometer and bled the radiator and thermostat but the car is still overheating. It takes forever for the temperature guage to get to the halfway mark. When it does it eventually goes into the red. Any ideas?

  2. #2
    Join Date
    Feb 2004
    Location
    Los Angeles, California, USA
    Posts
    8

    Default

    cHECK ALL YOUR HOSES.

    mY FAN WAS SLICING INTO ONE OF MY HOSES ADN I COULDNT EVEN SEE IT, SMALL HOLE.....dEFINETELY FIRST THING TO CHECK.
    Hi, my name is Eric......and I am a BMW-aholic.

  3. #3
    Unregistered Guest

    Default

    I am new to car repair. How can I tell if a hole is in the hoses.

    Quote Originally Posted by ///M Power
    cHECK ALL YOUR HOSES.

    mY FAN WAS SLICING INTO ONE OF MY HOSES ADN I COULDNT EVEN SEE IT, SMALL HOLE.....dEFINETELY FIRST THING TO CHECK.

  4. #4
    Join Date
    Dec 2003
    Location
    SoCal
    Posts
    166

    Default It could be several things

    Best bet it to goto Bruno's site and read up on it.

    http://www.bmwe34.net/e34main/trouble/overheating.htm

  5. #5
    Join Date
    Dec 2003
    Location
    Canada, ON
    Posts
    732

    Default Check a couple of things for us

    Quote Originally Posted by cal
    I put in a thermometer and bled the radiator and thermostat but the car is still overheating. It takes forever for the temperature guage to get to the halfway mark. When it does it eventually goes into the red. Any ideas?
    The 525i is hard to bleed... You need to follow the procedure in BMWE34.net.
    Meaning blowing with your mouth in the radiator filling neck and bleeding the thermostat housing bleed screw then the radiator bleed screw.

    Ok, you need to find why the car overheats... Could be many things.

    Tell us if it overheats at idle or any other time
    '85 Euro 635csi Race Turbo, megasquirt, Group A
    '92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
    '02 Subaru WRX Wagon with STI springs, bigger sway bars

  6. #6
    Unregistered Guest

    Default

    If the radiator is clogged will it possibly cause this problem. The coolant doesn't get hot in the radiator when the car overheats.

    Quote Originally Posted by Bruno
    The 525i is hard to bleed... You need to follow the procedure in BMWE34.net.
    Meaning blowing with your mouth in the radiator filling neck and bleeding the thermostat housing bleed screw then the radiator bleed screw.

    Ok, you need to find why the car overheats... Could be many things.

    Tell us if it overheats at idle or any other time

  7. #7
    Join Date
    Dec 2003
    Location
    Canada, ON
    Posts
    732

    Default

    Could be the radiator or the thermostat. I will start by changing the thermostat (cheaper) then BLEED the circuit. follow the instructions I gave you.
    '85 Euro 635csi Race Turbo, megasquirt, Group A
    '92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
    '02 Subaru WRX Wagon with STI springs, bigger sway bars

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