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Thread: (( WARNING )) DYNOFLO ENGINES BAD DEALINGS

  1. #1
    Senior Member MASTER BUILDER
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    (( WARNING )) DYNOFLO ENGINES BAD DEALINGS

    Hi Guy's Take a look at the pics below and take a guess at what happened.
    I will give out more info and pics as the post progresses .
    First clue is its out of a Large cube SBC Good Luck and I cant wait to here your answers.







    If your not wearing A BOWTIE
    Your NOT properly dressed


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  2. #2

  3. #3
    Member CRAFTSMAN
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    looks like a clearence problem or related .......my guess

  4. #4
    Senior Member MASTER BUILDER
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    Let's see..... either a rod-to-block clearance discrepancy,or... someone forgot to torque some rod bolts? ops:

  5. #5
    Senior Member MASTER BUILDER
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    i would think if some one put the engine togather right with enough clearance from the rods to block and torqued everything right it did't hit the block.that would be a rookie mistake.the only why the rod makes contact with something is the main caps broke or block,or crank but that's rare.if the piston broke there wouldn't be the big contact spot because aluinium woulnd't do that to steel and no marks on the small end of rod.so does it come down to the roller lifter broke and pined between the rod and the block on down stroke and pulled the rod apart then the other bolt hit.the bearing in the pic don't have anything to do with it.the bearing slide after the rod was contacted.the rod was number 2,4,6,8.i will have more info if you take pics of cam and lifters.jeff

  6. #6
    Senior Member DYNO OPERATOR
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    I'm with you i think lifter or oil pump broke off depending on what pump you ran i have seen some of the melling small block pumps brake also have seen the tip of a roller rocker brake and get caught in there to.

  7. #7
    Senior Member MASTER BUILDER
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    First Clue It had 60psi at 2000 rpm until it locked up
    If your not wearing A BOWTIE
    Your NOT properly dressed


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  8. #8
    Senior Member RACING JUNKIE
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    If's it's out of the 454" motor, i know you've already been running it, so i would say the oil pump quit, if not that a ring or ring land broke and the cylinder seized the piston causing the rod damage. That is if this is the only culprit/damage. could have broken a valve or spring, but that would be my last choice.

    Zip.

  9. #9
    Senior Member MASTER BUILDER
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    Partially rite Zip out of a 454 sbc Keep tryin
    but the 2nd CLUE It only had 8 minutes run time on the motor
    If your not wearing A BOWTIE
    Your NOT properly dressed


    http://racingjunk.com/profile/1099

  10. #10
    Senior Member MASTER BUILDER
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    i would think the rod bolts or main caps were left loose.i don't what to be a ass hole but ho ever put the bottom end togather screwed up. this is a classic case of OOPS i was drinking some beer. if the treads weren't pulled out and the bolts aren't broken then the bolts were never tighten.i have been building engine for 20yrs and have seen this before.good luck jeff


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