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Crank contact with CAS

Posted by BLACK'98DSM, Nov 11, 2019

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  1. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    Is the crankshaft supposed to rub against the CAS? When I changed the CAS I noticed that it had some material missing, due to being in contact the the crankshaft. From my understanding the crankshaft is supposed to be a couple millimeters off the sensor?
     

    Road Race Build 2K  25

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    fwd · manual · 2G DSM

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  2. dsmcrzy

    dsmcrzy Proven Member

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    Trenton, Ohio
    It’s supposed to have space. Where did you get it from? The only place I have had luck with besides OEM has been NAPA. Anywhere else (autozone, advance, etc) they are too long, or too short. There are a few threads on this site documenting it. It’s also been my own personal experience.
     

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  3. BLACK'98DSM

    BLACK'98DSM Proven Member

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    I thought so.

    It was the stock one. That's concerning, if the stock one rubs then something must be wrong? I can check the new one to see if it is rubbing too, but when I compared them they were the same lengths so it most likely is.
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    390  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

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    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
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  4. silvreclips

    silvreclips Proven Member

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    I have multiple crank sensors in my spare parts box and all of them show signs of contact right on the tip. Not really sure why but it must be normal.
     

    Autocross Build 229  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  5. Macgyver'sDSM

    Macgyver'sDSM Proven Member

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    On the lake, Wisconsin
    Check the end play on your crank. If the thrust bearings get worn [ crank walk ] your crank can make contact with your crank sensor.
     

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    1995 Eagle Talon TSi
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  6. VelocitàPaola

    VelocitàPaola Moderator

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    Ft. Lauderdale, Florida
    Are you thinking of the 4G63? Crank walk hasn't been a big concern with the 420A engine, and the 420A's crank sensor is perpendicular to the crank's axis or rotation, so a thrust bearing failure wouldn't bring the crank any closer to the sensor.
     

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    1995 Mitsubishi Eclipse N/T
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  7. Macgyver'sDSM

    Macgyver'sDSM Proven Member

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    On the lake, Wisconsin
    Yes 4g63 sorry didn't catch the 420a
     

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    1995 Eagle Talon TSi
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