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  • 3 Post By rspears

Thread: 1969 chevy small block water pump hub bolt pattern
          
   
   

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  1. #1
    jrz28cam355 is offline CHR Junior sMember Visit my Photo Gallery
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    1969 chevy small block water pump hub bolt pattern

     



    I purchased a new water pump,long style but when I went to mount the pulley,the bolt holes did not line up, they are about a half a hole off. The water pump hub is half a hole smaller than the pulley. This pulley came off a 1978 camaro with a 350. Are there different water pump hub bolt paterns or do I need to get a different pulley?

  2. #2
    rspears's Avatar
    rspears is offline CHR Member/Contributor Visit my Photo Gallery
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    Car Year, Make, Model: '33 HiBoy Coupe
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    SBCWP.jpg
    -
    Some SBC pumps came drilled & tapped for two different 4 bolt patterns. This picture was highlighting shim sets sold by Mr Gasket, but clearly shows the difference in spacing. I'd say you'll either need to get a different pump or a different pulley to fit the new pump you have.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

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