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Thread: Correcting Crank End Play Question

  1. #1
    Junior Member JOURNEYMAN
    Join Date
    Dec 1969
    Posts
    28

    Correcting Crank End Play Question

    Sbc with a 383 kit and a new crank, end play measures .0015" after seating the thrust bearing with wood block and hammer. The question is what is an acceptable method of increasing the end play? Does the crank need to go back to the grinder or can I surface grind a few thousandths off one side of the thrust bearing?

  2. #2
    Senior Member RACING JUNKIE curtisreed's Avatar
    Join Date
    Feb 2004
    Location
    KIEFER, OK.
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    1,309
    You can sand the thrust bearing. I have done it by placing 600 grit wet or dry with oil on it laying on a piece of glass. Whatever you lay it on just needs to be really flat. Only use a figure 8 pattern, take you time and measure often.

    Curtis

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
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    La.
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    2,890
    Did you measure both bearing surfaces, they are not always a matched set? I agree with Curtis, a surface plate or a piece of glass if you don't have a surface grinder available too you.

    Zip.

  4. #4
    Senior Member RACING JUNKIE
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    Dec 2008
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    Sugar Hill, GA
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    1,365
    Did you seat the thrust bearing with minimum torque on the main bearing caps?
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triump of evil is for good men to do nothing" Edmund Burke

  5. #5
    Senior Member DYNO OPERATOR
    Join Date
    Jan 2004
    Location
    central Illinois
    Posts
    459

    Correcting

    Before you start working on the bearings, I would get a second opinion from an experienced builder or racer that has done engine work.

    It is uncommon to only have .0015". More like .004"- .006" is common.

    Just have all your main caps finger tight plus a little and recheck. Then torque the thrust cap to 20- 25# and see if it is still the same. Tap it a couple times with the wooden block and a hammer both ways and recheck.

    If still only .0015", get some help.

    JMO

  6. Racing Junk


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