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Technical V belt rubs P/S install ‘63 Impala

Discussion in 'Traditional Hot Rods' started by Eth727, Aug 12, 2025 at 5:27 PM.

  1. Eth727
    Joined: Jun 20, 2024
    Posts: 260

    Eth727

    IMG_8380.jpeg Hey guys I added factory P/S to my ‘63 Impala. All the parts are stock and new for a ‘63 but why is the alternator/fan belt rubbing? Any ideas to correct this? Thanks
     
  2. Pump to high? Doesn't quite look like a factory bracket.
     
    427 sleeper likes this.
  3. skooch
    Joined: Feb 7, 2007
    Posts: 695

    skooch
    Member

    Move the alternator
     
  4. jimmy six
    Joined: Mar 21, 2006
    Posts: 16,723

    jimmy six
    ALLIANCE MEMBER

    I thought 63’s had a generator? Raise it up, or possibly shorten the Gen belt. They were very close stock. Maybe 1/4” off.
     
  5. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 3,590

    Kerrynzl
    Member

    Alternator ? or Generator ?
    Run a straight edge from the power steer pulley to the water pump pulley.[inside the "V"]
    Do the same with the crank /waterpump pulley to the alt/gen

    Not too well known is the flange depth on the early short waterpumps is different between Alt and Gen
    Most replacement short waterpumps are for a Corvette.

    The crank pulleys also vary in depth
     
    Last edited: Aug 12, 2025 at 6:24 PM
  6. 2 things. It looks like there is a spacer or some other piece of material between the Pump braclet and the block. How well does the Pump pully line up with the bottom crank pully groove? It looks to be forward some, can't have that.
     
  7. Got a pic from the front
     
    captaintaytay and Pist-n-Broke like this.
  8. Eth727
    Joined: Jun 20, 2024
    Posts: 260

    Eth727

    All the pulleys line up. If I mess with the alternator then the PS pulley will be off.
     
  9. evintho
    Joined: May 28, 2007
    Posts: 2,544

    evintho
    Member

    Can you slot the P/S pump or bracket to move it down 1/4"?
     
  10. Can you show a pic of how you routed that belt?
     
  11. Dick Stevens
    Joined: Aug 7, 2012
    Posts: 4,042

    Dick Stevens
    Member

    63 was the first year that Chevies came with an alternator.
     
  12. Eth727
    Joined: Jun 20, 2024
    Posts: 260

    Eth727

    Yeah I tried with a different belt and shorter slot positions and still rubs
     
  13. Eth727
    Joined: Jun 20, 2024
    Posts: 260

    Eth727

  14. Eth727
    Joined: Jun 20, 2024
    Posts: 260

    Eth727

    These are the brackets I used.
     
  15. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,061

    Johnny Gee
    Member
    from Downey, Ca

    Is this the type exhaust manifold (per alternator mounting) and alternator brackets you have? IMG_4542.jpeg IMG_4541.jpeg IMG_4540.jpeg
     

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