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Clutch fans

Discussion in 'The Garage' started by Muddytazz, Dec 13, 2005.

  1. Muddytazz

    Muddytazz 1 ton status

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    I haven't had time to look at them yet, but I've got a 7 blade with a bad clutch and a 6 blade with a HD clutch, can I take the 7 blade fan off the bad clutch and bolt it to the 6 blade HD clutch?
     
  2. k20

    k20 3/4 ton status

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    I believe you can.
     
  3. 73k5blazer

    73k5blazer Unplug the matrix cable from the back of your head Premium Member

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    I believe they are physicall interchangable. But if you look in the parts books, there are different ones sized for different engines, fans, etc, transmissions etc. It's a judgement call.
     
  4. Muddytazz

    Muddytazz 1 ton status

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    I know my 7 bladed fan came stock on my 350/350/203 and the 6 bladed HD came stock on a 400/350/203
     
  5. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Are they semi-rigid , or rigid ?

    I used a rigid from another truck thinking I'd get better airflow at all speeds , and ended up rubbing the fan shroud when flexed . Put my original semi-rigid back on and it doesn't rub anymore .

    They looked by eye to be the same diameter , and same depth , but was off enough to annoy me .

    I believe the rigid was 7 blade , and the semi-rigid was 6 blade . I would have to go home and look .
     
  6. Muddytazz

    Muddytazz 1 ton status

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    I know my original 7 bladed one stuck out from the motor slight closer to the rad than the 6 bladed one I have on there now.....but I just like the fact of having 7 blades versus 6 blades, thats why I was wondering if I could just swap the blades over.
     
  7. Muddytazz

    Muddytazz 1 ton status

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    Does anyone know if there are part numbers stamped on the fans and the clutches to do some research?
     
  8. HarryH3

    HarryH3 1 ton status Author

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    The factory original should have a couple of letters printed on it somewhere. They signify how the internals work (when it locks, how long it stays locked, etc.)
     
  9. Muddytazz

    Muddytazz 1 ton status

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    I was reading somewhere that you shouldn't put a regular duty fan blade on a severe duty or heavy duty clutch due to the fan pitch? How do I tell what is what?
     
  10. HarryH3

    HarryH3 1 ton status Author

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    You probably need to check out a Delco parts book to decode which one you have. :(
     
  11. Muddytazz

    Muddytazz 1 ton status

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    Well that bites the big one lol
     

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