74 Z28 radiator fan

Discussion in 'Camaro Questions' started by Jeep43, Jan 9, 2018.

  1. Jeep43

    Jeep43 Veteran Member

    977
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    Mar 30, 1999
    Connecticut
    My mostly original 74 Z came with a fixed flex type fan (sheetmetal blades riveted to a main hub and bolted to the water pump with an aluminum spacer). I presume this is not the factory type and assume that there was a clutch fan there from the factory.

    What should my non-A/C 4 speed car (if that at all matters) have for a cooling fan??
     
  2. ronzz572

    ronzz572 Veteran Member Lifetime Gold Member

    1,852
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    Feb 8, 2007
    imperial pa
    The 74 z28 uses a standard flex style fan with a aluminum spacer with or without A/C. Post some pictures to confirm what you have?
     
  3. Jeep43

    Jeep43 Veteran Member

    977
    9
    Mar 30, 1999
    Connecticut
    Dragged it out. Its marked 330533 so I guess its original.

    Any worry of this type of fan construction coming apart?? During my searches I found that a similar style (but larger diameter) on 70's/80's trucks # 336032 prompted a letter somewhat recently from GM to advise discontinuation of use.
     
  4. Zstar

    Zstar Veteran Member

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    Mar 23, 2014
    Ocala, Florida
    My 73 came the same way, no problems.
     
  5. 74Z28GC3

    74Z28GC3 Veteran Member

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    Sep 1, 2000
    North Pole, Alaska
  6. Jeep43

    Jeep43 Veteran Member

    977
    9
    Mar 30, 1999
    Connecticut
    So my 330533 needs to be restored. Right now its mostly black but the black on the tips of the flex blades is bare stainless, its weathered and has some minor rust on the hub/rivets. I presume a good coat of semigloss over the whole thing is the right finish?

    Any tips to strip the old paint? I don't want to throw it in the blaster and get grit caught between the sheetmetal assembly? Perhaps just aircraft stripper to get the paint off followed by a bath in evaporust to remove any minor rust on the rivets/hub then shoot it?
     
  7. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    May 5, 2005
    Rockford, MN
    I would think paint stripper should do it. I had my fan blade powder coated so the paint finish would hold up better on the blades.
     
  8. COPO

    COPO Veteran Member Lifetime Gold Member

    16,451
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    Sep 15, 1999
    Ontario, Canada
    I used spray can paint remover.
     
  9. Jeep43

    Jeep43 Veteran Member

    977
    9
    Mar 30, 1999
    Connecticut
    45 mins with aerosol aircraft remover didn't phase it. Will have to rethink this....
     
  10. bodymanbill

    bodymanbill Veteran Member

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    Feb 1, 2007
    South Park Pa
    image.jpg Just put it in the blast cabinet, i did mine on my 73 that way with no issues
     

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