Strangest Rod bearing ordeal I've ever ran into - FirebirdV6.com/CamaroV6.com Message Board

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Strangest Rod bearing ordeal I've ever ran into

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  • Strangest Rod bearing ordeal I've ever ran into

    So..there was a very quiet knock in my engine.

    and not to be one who just says " Eh, I'll wait until it gets worse " I pulled that S.O.B. apart from the bottom end, and behold...Cylinder 3's connecting rod cap was loose. I took it off and the bearings looked as if they had been rubbed down into thin peices of metal. Didn't even have the notches anymore ( They didn't spin either. )

    I removed the rest of the connecting rod caps as well, Rest of them were fine, besides the normal wear and tear of a 150k mile engine...which is pretty good since I have a 220k mile engine. :)

    Measuring the others out with plastigage, I they didn't even need oversized, so I installed them with standard bearings. well Cylinder 3 wants to be a son of a *****.

    I installed a standard bearing on it, once torqued down and everything. I could still push up on the cap and it'd move the cap, rod and piston up a little. I removed that and went and picked up a .010 and .020 oversized bearing. Even the god damned .020 oversized does it, just not as much. The crank itself isn't scarred, or out of round.

    ...The only other size I can go up is .030 but what the hell? could it really have been that bad? Or am I going the wrong direction here? Do I need to get a hold of an undersize? (NAPA has them. =p )

    I'm to the point I just want to be able to drive the damn car back and forth to work. I'm broke as hell, and I can't get more hours at work until I have a vehicle to drive...and no one else can help me family wise or anything.

  • #2
    Re: Strangest Rod bearing ordeal I've ever ran into

    When you have a bearing failure you need to have the crank machined or replaced. The easy way it to buy a crank kit with bearings from the parts store. You will need to replace the rod too.
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    • #3
      Re: Strangest Rod bearing ordeal I've ever ran into

      if your engine was knocking that means your bearing WAS spinning

      you are going to need at least a new rod

      can you take a picture of the crank journals?

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