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Thread: Belt size needed after removing smog pump on 472 ?

  1. #1
    JRG73 is offline Cadillac Owners Member
    Automobile(s): 1973 Coupe De Ville
    Join Date
    Feb 2010

    Belt size needed after removing smog pump on 472 ?

    I own a 1973 Coupe DeVille with a 472. I'm wondering if anyone knows what size belt I would need in order to bypass the smog pump.

    Thank You!

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  3. #2
    drmenard is offline Cadillac Owners Connoisseur
    Automobile(s): 95 FWB 81SDV 96 FWB 94 Fleetwood
    Join Date
    May 2003

    Re: Belt size needed after removing smog pump on 472 ?

    You can't just take off the smog pump... One belt goes around the crank , waterpump and smog pump... another goes around the waterpump[on a different pulley] and the Alt. ... If you take off the first one nothing turns the waterpump ... waterpump not turning means Alt. not turning... The only year bottom crank pulley , 1970, would let it work... it was the only year with 2 belts to the a/c comp and PS and one belt for the Alt. .. Complete pulley set-ups from 76 to 79 can be used ... they must have no smog pump... but the A/C and PS pulleys would also have to be could call MTS and see if he a 1970 crank pulley...


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