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89 v3500 sb... reverse rotation waterpump?

Discussion in 'The Garage' started by camiswelding, Mar 8, 2005.

  1. camiswelding

    camiswelding 1/2 ton status

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    Since my truck is in a million pieces I was wondering if anyone can confirm the 89 sb v3500 has a reverse rotation waterpump.. I believe it does but I cant remember

    thanks
    cam
     
  2. u2slow

    u2slow 1/2 ton status

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    Should be conventional rotation. My '91 V3500 was. Pump turns same direction as crank.

    Reverse rotation pump got used with trucks that had a single serpentine belt and belt tensioner. Pump turns opposite direction as crank.
     
  3. Emmettology 101

    Emmettology 101 3/4 ton status

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    My 89 2500 has the single serp belt and reverse water pump...
     
  4. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Which body style?


    FWIW, my 91 V3500 has a standard rotation water pump. If I remember correctly, the original motor in my 91 K5 had a serpentine belt set up with a reverse water pump.
     
  5. Emmettology 101

    Emmettology 101 3/4 ton status

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    Sorry, mine is a new body style with IFS... It's technically a heavy half.
     
  6. camiswelding

    camiswelding 1/2 ton status

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    thanks everyone....

    I concur now... standard roatation.... thanks for helping me figure it out

    cam
     
  7. rdn2blazer

    rdn2blazer 1 ton status Premium Member

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    my 89 3500 crew cab old body style has single sepr belt and is rev. rot. water pump.:)
     
  8. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Regardless of year, if it has V belts it is standard rotation, if it has a single serpentine belt it is reverse rotation. :deal:
     
  9. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    It would be interesting to know why trucks of the same body style and similar years have different belt configurations. :thinking:
     
  10. u2slow

    u2slow 1/2 ton status

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    Engine size may be a factor?

    My '91 V3500 (350 TBI) had one v-belt and one multi-groove (serpentine) belt. Conventional rotation water pump.

    EDIT: No smog pump, or AC either.
     
  11. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    My 91 crew cab is set up the same as yours with the "v" and multi groove belts (with a/c, no smog) but my 91 K5 originally had a 350 with the serp system (with a/c, can't remember if it had a smog pump).

    Maybe a smog pump is the difference? :thinking:
     
  12. camiswelding

    camiswelding 1/2 ton status

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    ditto for me... with a/c.... multi groove and 1 v belt


    about this time in production gm was thrwoing anything lft over from the gen 2 production run into the mix....
    1/2 metric 1/2 standard

    thanks everyone

    cam
     

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