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Thread: Where to get 3.0L engine bearings and oil pump?

  1. #11
    Administrator Ron's Avatar
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    Quote Originally Posted by PJ Grady Inc. View Post
    Plastigauge is used on the rod and main bearings to determine tolerances. You lay a piece across the bearing and install the cap and torque to spec. Then you remove the bearing cap and measure the width of the flattened plastigauge with a calipers to determine if the bearing clearance is within specs.
    Rob Grady
    If Rob wasn't burning the midnight oil, I think he might of said-
    The journal diameter and a formula is used to determine tolerances (supplied by the engine manufacturer).
    For a typical street car:
    Cmin = 0.0005 x D
    Cmax = 0.001 x D
    D = actual journal diameter

    You lay a piece across the journal, install the cap (or housing) and torque to specs. Then you remove the cap and match the width of the flattened plastigauge to one of a series of marks on the printed calibrated scale supplied. The clearance indicated by the matching mark must be within Cmin and CMax.

    =======

    Miking, or mic'ing, is simply using a micrometer to measure the diameter of the journals. The measurements must be within specs (also supplied by the manufacturer). If the journals are large or used, it is very important to measure each one in several places...

    HAVE FUN!

  2. #12
    Senior Member
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    Club(s):   (AZ-D) (DMA) (DOA) (DCUK)

    Quote Originally Posted by PJ Grady Inc. View Post
    Plastigauge is used on the rod and main bearings to determine tolerances. You lay a piece across the bearing and install the cap and torque to spec. Then you remove the bearing cap and measure the width of the flattened plastigauge with a calipers to determine if the bearing clearance is within specs.
    Rob Grady
    Quote Originally Posted by Ron View Post
    If Rob wasn't burning the midnight oil, I think he might of said-
    The journal diameter and a formula is used to determine tolerances (supplied by the engine manufacturer).
    For a typical street car:
    Cmin = 0.0005 x D
    Cmax = 0.001 x D
    D = actual journal diameter

    You lay a piece across the journal, install the cap (or housing) and torque to specs. Then you remove the cap and match the width of the flattened plastigauge to one of a series of marks on the printed calibrated scale supplied. The clearance indicated by the matching mark must be within Cmin and CMax.

    =======

    Miking, or mic'ing, is simply using a micrometer to measure the diameter of the journals. The measurements must be within specs (also supplied by the manufacturer). If the journals are large or used, it is very important to measure each one in several places...

    HAVE FUN!
    Much more eloquent and accurate. So much oil...so little time. Carry on!
    Rob

  3. #13
    Administrator Ron's Avatar
    Join Date:  Jun 2011

    Location:  North GA

    Posts:    4,316

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    Quote Originally Posted by PJ Grady Inc. View Post
    Much more eloquent and accurate. So much oil...so little time. Carry on!
    Rob


    Too many irons....Need another fire.

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