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Thread: Replacement Blower Problem

  1. #1
    Join Date
    Sep 2005
    Location
    MI
    Posts
    176

    Default Replacement Blower Problem

    So my blower died on the coldest day this Michigan Winter and I bought a Pre-pwnd replacement on ebay. If any of you have ever replaced the blower on a 525i you know it's not easy. Anyway, I took the old one out and put the different old one back in but it didn't fit. It fit too tight. The fan is too close to the motor.

    I have to move it back.







    How do I move this fan back into place and how much stress can it take before it breaks? I have wd-40 on it right now but nothing is happening.

    Throw me a bone.
    Job 14:1 Man born of woman is of few days and full of trouble.
    az

  2. #2
    Join Date
    Mar 2004
    Location
    FFFFrreeeezing Edmonton Ab.
    Posts
    5

    Default

    Quote Originally Posted by azale
    So my blower died on the coldest day this Michigan Winter and I bought a Pre-pwnd replacement on ebay. If any of you have ever replaced the blower on a 525i you know it's not easy. Anyway, I took the old one out and put the different old one back in but it didn't fit. It fit too tight. The fan is too close to the motor.

    I have to move it back.







    How do I move this fan back into place and how much stress can it take before it breaks? I have wd-40 on it right now but nothing is happening.

    Throw me a bone.
    I poured boiling water on the centre hub and gentley pryed them out.I used one of those tools for removing the clips on door panels,I had to modify the tool a bit to get it to fit around the shaft a little further.Hope this makes sence.
    Peat //90 535i 5spd

  3. #3
    Join Date
    Mar 2004
    Location
    FFFFrreeeezing Edmonton Ab.
    Posts
    5

    Default

    I poured boiling water over the centre hub and gently pried the squirel cages out using one of those tools for removing door panels. I modified the tool a bit to get it to fit around the shaft a little further. It worked for me,I was too cheap to buy the whole assembly and only bought the motor.
    Peat //90 535i 5spd

  4. #4
    Join Date
    Jan 2007
    Location
    Dayton Ohio
    Posts
    1,463

    Default The trick is even pressure.

    Looks like the squirel cage has been pressure all the way down onto the motor. In my case there was still about 3/8" gap so I took an old open end wrench that would just fit over the motor shaft and clamped the wrench in a large vise. I then use a flat round punch and drove the motor shaft out of the cage. In your case you will need to open up a gap first. Have you tried using screw drivers 180 degrees apart and prying up evenly. I can tell you any extra stress on these 20+ year old cages will cause them to break.

    Ken

    Quote Originally Posted by azale
    So my blower died on the coldest day this Michigan Winter and I bought a Pre-pwnd replacement on ebay. If any of you have ever replaced the blower on a 525i you know it's not easy. Anyway, I took the old one out and put the different old one back in but it didn't fit. It fit too tight. The fan is too close to the motor.

    I have to move it back.







    How do I move this fan back into place and how much stress can it take before it breaks? I have wd-40 on it right now but nothing is happening.

    Throw me a bone.

  5. #5
    Join Date
    Sep 2005
    Location
    MI
    Posts
    176

    Default

    Thanks for the help guys. I ended letting the WD40 soak in for a day or two (probably didn't do anything), and then I rotated the fans opposite of one another to break one loose from the shaft (I don't know why I didn't think of this before). Of course, the wrong fan broke loose so I used some channel locks to grip the shaft and luckily, the fan snapped loose. After that, I just rotated it until it slid away from the motor far enough.

    I was pretty impressed with how much abuse the fan blades were able to take after 12+ years. I really had to bend them and twist them to squeeze the blower between the intake manifold and the bulkhead. Kind of a bad design but it worked. In 10 more years when the plastic is more brittle it will be a very bad design.

    Thanks again.
    Job 14:1 Man born of woman is of few days and full of trouble.
    az

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