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Connecting Rods

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  • karterfred88
    replied
    Originally posted by az64stude View Post
    I would like to know the weight tolerances in grams for the rods in a stock 259 engine. I have a 15 gram difference and I need to know if that's acceptable I dont see any info in the shop manual for balancing tolerances.
    Thanks
    Top of rod, bottom of rod, with or without cinch bolts, out of the same engine or different ones?

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  • az64stude
    replied
    Thanks for the great advice Mike & Jack. I will be getting them bored and balanced.

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  • PackardV8
    replied
    Connecting rods are balanced by hanging them horizontally, one end on a hook and the other end on a gram scale. All eight small ends should weigh within one gram of each other and all the big ends should be within one gram.

    And yes, fifteen grams would be noticeable.

    jack vines

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  • Mike Van Veghten
    replied
    This is why it's "always" good to dynamically balance en engine during a rebuild. Even for a lower rpm engine like a Stude.
    If it's just going to putt around town, no problem. If you are going to do much freeway driving, too much difference.

    Mike

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  • az64stude
    started a topic Engine: Connecting Rods

    Connecting Rods

    I would like to know the weight tolerances in grams for the rods in a stock 259 engine. I have a 15 gram difference and I need to know if that's acceptable I dont see any info in the shop manual for balancing tolerances.
    Thanks
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