Mack 350 engine problem

Discussion in 'Mack Forum' started by samson73103, Aug 11, 2022.

  1. samson73103

    samson73103 Bobtail Member

    Aug 30, 2017
    I heard a racket that I first thought was a u-joint. Was downshifting at the time, traveling about 35-40. Once I turned it got worse so I pulled over to investigate. No loose pulleys that I can see. What else could it be besides a rod knocking? No smoke, good oil pressure and engine temp. Truck is a 99 CH600 with 350 with Super 10.
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