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Blower fan service

Discussion in '308/328' started by mixedgas, Oct 14, 2024.

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  1. mixedgas

    mixedgas Formula Junior
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    Mike
    #1 mixedgas, Oct 14, 2024
    Hi there, what do you guys usually do to service the blower motors tucked in front of the front wheels? Clean and test? Grease bearings and call it good? Replace with new? Seems these could be hard to access when the front suspension is installed (my suspension is out right now). Thanks!
    View attachment 4939326
     
  2. mixedgas

    mixedgas Formula Junior
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    #2 mixedgas, Oct 14, 2024
  3. mixedgas

    mixedgas Formula Junior
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    #3 mixedgas, Oct 15, 2024
    Was having trouble uploading photos from my phone. These are the heater blowers in question. I see superformance has them for 140 'quid' each but I think I'm going to clean them up, lube the bearings, clean the brushes etc and see how they go. Thanks in advance for any tips on rehab'ing these blowers.
    -Mike
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  4. mixedgas

    mixedgas Formula Junior
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    #4 mixedgas, Oct 15, 2024
    The gray vinyl ducting looks in surprisingly good shape, planning to clean and reuse
     
  5. Imatk

    Imatk Formula Junior

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    #5 Imatk, Oct 15, 2024
    You can access them with the suspension on, it's just a little tighter.

    If it were me I'd clean them up a little and if they work, leave them alone. There's plenty of things you'll probably have to replace on the car when it breaks.

    The hose is a royal PITA to get attached to the heater box and then routed to the fan.

    Mine ripped upon removal... well.. the coil ripped it I guess.
     
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  6. pshoejberg

    pshoejberg Formula 3
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    #6 pshoejberg, Oct 15, 2024
    It depends on how much time you have and how much effort you want to put into the project. If the plastic casing is intact or at least in good condition, I would forget about the new "aftermarket" blowers and repair the old ones. It's a pretty standard job as you mention and you can get a really nice result if you paint and galvanize the hardware and buy new motor labels. I have fixed several of these blowers with no big issues. On the last blowers I overhauled for my 512bbi I even moved the resistor inside the blower to cool it more efficiently. Enjoy the small project and take good care of the small blower motor shims !

    Best, Peter

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  7. mixedgas

    mixedgas Formula Junior
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    #7 mixedgas, Oct 17, 2024
    @pshoejberg thank you very much for the photos and info! My 10 year old daughter and I did a quick service on both blowers on the 308. We didn't fully restore (we were short on time) but we cleaned the brushes/rotor, lubed the rotating surfaces, and cleaned up the old gunk. Bench testing indicated both blowers ran strong so we re-installed. Thanks again!

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  8. Imatk

    Imatk Formula Junior

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    #8 Imatk, Oct 18, 2024
    Nice! I need a small helper to fit into those tight spaces!
     
  9. dino1971

    dino1971 Karting
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    #9 dino1971, Oct 19, 2024
    Very good write-up! I can add that, if the motor coil is burned out (like mine was) and the fan no longer working, it's possible to manually re-wind it with the correct gauge copper wire. A little patience here goes a long way... I can add instructions if someone is interested.
     
  10. samsaprunoff

    samsaprunoff F1 Rookie
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    #10 samsaprunoff, Oct 19, 2024
    Good day All,

    I cannot speak for all areas, but this rewinding motors is pretty common and in my City there are a few shops that specialize in this... along with replacing commutators, etc. I have not had to have a motor rewound in quite a while (the failure rate of the windings tends to be low), but when I did I was charged just over $100 which included fresh brushes (commutator was fine). So... if you do not want to DYI, check around, as there might be a shop that does it reasonably.

    Going forward, motor technology has really improved over the last number of years in terms of size (smaller), reliability, efficiency, and without any need for brushes (e.g. Brushless DC Motors - BLDC). All in all a win-win and especially with the efficiency side, as then our car's DC motors would draw less current which would minimize electrical issues with our cars. The challenge will be to find a new BLDC motors that look (more or less) and can fit and/or be used in places where the original DC motors were used.

    Cheers,

    Sam
     
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