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BRINGING IT ALL TOGETHER.... A's, G's & E's


2 posters

    Need help 250 6 cyl

    gkpost
    gkpost
    gkpost


    Number of posts : 224
    Location : nh
    Registration date : 2010-10-16
    • Post n°1

    Need help 250 6 cyl Empty Need help 250 6 cyl

    Post by gkpost Wed Dec 04, 2013 3:56 pm

    I have a rebuilt 250 chevy 6 cyl made 73-78. I put a new harmonic balancer with two grooves for the fan belts. Neither pulley I have lines up correctly. I understand that there are different water pumps, the one I have on the motor is 4 inch.
    Any help, Thank you ~ GK.
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    donivan65
    donivan65
    donivan65
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    Number of posts : 12248
    Location : San Diego, California
    Registration date : 2008-05-12
    • Post n°2

    Need help 250 6 cyl Empty Re: Need help 250 6 cyl

    Post by donivan65 Wed Dec 04, 2013 5:57 pm

    The balancer should be about 1/8" away from the oil pan,,,,,,does the alternator pulley line up with the waterpump pulley and balancer,,,,,,3 7/8" waterpump sounds normal to me,,,,,,there are 4 3/8",,,,,,,however,,,,lots of different pulleys for it,,,,,,,,
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    gkpost
    gkpost
    gkpost


    Number of posts : 224
    Location : nh
    Registration date : 2010-10-16
    • Post n°3

    Need help 250 6 cyl Empty Re: Need help 250 6 cyl

    Post by gkpost Fri Dec 06, 2013 3:56 pm

    The waterpump looks like it measures 4", I have a old waterpump off a junk motor it's 4 1/4".
    neither of these work with the alternator. I'm thinking the balancer may not be all the way on. I only need it to go on another 1/8 inch. The crank is flush with the balancer, is that correct ?
    Thanks `GK.
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    donivan65
    donivan65
    donivan65
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    Number of posts : 12248
    Location : San Diego, California
    Registration date : 2008-05-12
    • Post n°4

    Need help 250 6 cyl Empty Re: Need help 250 6 cyl

    Post by donivan65 Fri Dec 06, 2013 5:15 pm

    So nothing is real,,,,,,,the engine, waterpump, balancer and alternator bracket are from different places,,,,,Is it the right alternator bracket and balancer,,,,,,I would say the balancer has to be about 1/8" from hitting the oil pan when you look underneath,,,,,,the waterpump measurement should be from before the gasket on the flange, to where the fan sits on the flange,,,,,out of the 3 pulleys, do any match up,,,,,is one out of alignment,,,,,,these things don't exactly have to be perfect to work.......
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    donivan65
    donivan65
    donivan65
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    Number of posts : 12248
    Location : San Diego, California
    Registration date : 2008-05-12
    • Post n°5

    Need help 250 6 cyl Empty Re: Need help 250 6 cyl

    Post by donivan65 Fri Dec 06, 2013 7:16 pm

    Another thing,,,,,,if you got both engines,,,check where the holes in the block where the alternator bracket bolts on,,,,,,,they might not be in the same place which can move the alternator,,,,,,,
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    gkpost
    gkpost
    gkpost


    Number of posts : 224
    Location : nh
    Registration date : 2010-10-16
    • Post n°6

    Need help 250 6 cyl Empty Re: Need help 250 6 cyl

    Post by gkpost Sun Dec 22, 2013 2:39 pm

    Sorry about the late reply, life gets in the way. So the cure I used is I pulled the collar 1/8 inch forward on the water pump shaft. Now everything is lined up and on to the next problem, There are plenty but I'm getting closer.
    Thanks as always ~ GK.
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    • Post n°7

    Need help 250 6 cyl Empty Re: Need help 250 6 cyl

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