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Oldsmobile - Technical Discuss 350 throwing belts in the OLDSMOBILE CLUBS forums; Hello everyone, I have a 73 Cutlass w/ a 350 thats a oval track stock car, it has the 3 groove pulleys. Its always had a problem w/ the belts ...
  1. #1
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    350 throwing belts

    Hello everyone, I have a 73 Cutlass w/ a 350 thats a oval track stock car, it has the 3 groove pulleys. Its always had a problem w/ the belts loosening up after a run, but after the last three races the p/s belt has ended up around the fan and the alt belt stays in the groove but twists inside out. The p/s pump and alt are not loosening up and I've checked the pulleys for straightness, including shiming out the p/s pump 1/8 inch to line up better. Would it help any to move the alt to the right side of the motor? If I did would it line up w/ the pulleys or would I have to switch to the 2 groove ones?

  2. #2
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    Re: 350 throwing belts

    I'd try a different brand of belt first, like a Gates Green Stripe. If it keeps on you need deep groove pulleys. Stock stuff wasn't designed for high RPM race duty.

    Also check the water pump alignment. I got a RB pump one time that the pulley flange was cocked and the car kept throwing belts until I saw the ever so slight wobble- three times in less than 100 miles of driving <img src="http://www.aaca.org/ubbthreads/image...mlins/mad.gif" alt="" />. Talked enough caca to the counter guy when I took it back that he finally threw in new belts and antifreeze just to shut me up.
    Glenn Williamson
    AACA Life Member
    Member of all major Olds clubs

  3. #3
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    Re: 350 throwing belts

    Thanks for the reply Glenn, yes I'm guilty of using the cheap belts from the local auto accesory store. I'll have to check that water pump too -Eric

  4. #4
    Junior Member
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    Sep 2009
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    6

    Re: 350 throwing belts

    I also had a bad water pump throwing belts! It was a wobbly pulley flange on the pump too! same batch as rocketraider's????

  5. #5
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    Re: 350 throwing belts

    I assume you have the two factory spacers between the PS pump bracket and the block.
    Joe Padavano
    OCA Capital City Rockets chapter

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  6. #6
    Senior Member
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    Re: 350 throwing belts

    make sure you have all the right pulleys and brackets too... there are a bunch of them.
    Doug

    &quot;Oldsmobile - Always a Step Ahead&quot;

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