Putting car in gear to tighten crank sprocket bolt

Posted by boostjunkie92, Nov 14, 2017

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  1. boostjunkie92

    boostjunkie92 Probationary Member

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    Im attempting to tighten my crank sprocket bolt and i read that I could put the car into gear and have somebody hold the brakes to tighten the bolt to the 87 ft lbs but when I do this the motor still turns. The car is a manual. Why is the crank still turning?
     

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  2. chrysler kid

    chrysler kid Proven Member

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    No clue. I was able to re assemble everything and crank the wheel a hard left to fit my breaker bar back in there to tighten it up. So I did it with the wheels on the ground while in gear
     
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  3. Silent_White

    Silent_White Proven Member

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    is your friend also pressing the clutch?
     
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  4. boostjunkie92

    boostjunkie92 Probationary Member

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    Lol clutch is not pushed in...did have the driver side wheel off but passenger side was on the ground...the axel was not spinning though.
     
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  5. pauleyman

    pauleyman DSM Wiseman

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    All other wheels on the ground? Transfer case installed?
     
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  6. josh408

    josh408 Proven Member

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    You could try a gun with some loctite. you could try holding the cam gears but be careful not to jump timing that way, you could try wedging something on the crank sprocket to keep it from spinning. maybe throw on the bolts that mount the harmonic balancer to the sprocket to use as a wedge spot. Hopefully it all works out
     
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  7. boostjunkie92

    boostjunkie92 Probationary Member

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    Ended up using an electric impact and torque limiting extension. Thanks
     
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  8. luv2rallye

    luv2rallye DSM Wiseman

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    Last edited: Nov 15, 2017 at 10:54 AM
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  9. 93AWDDSM

    93AWDDSM Proven Member

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    Solid impact and loctite
     
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  10. boostjunkie92

    boostjunkie92 Probationary Member

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    I didn't want to resort to an impact because of the inability to limit torque but because of the mirage having a smaller engine bay I don't have the space between the wheel well and pulley to use such tools... Just to get the pulley out I have to remove the crank bolt and washer
     
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  11. chrysler kid

    chrysler kid Proven Member

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    I once had a customer with a 3000gt tell me his wife would not use the parking brake when she drove the car. She left it in gear parked on a steep incline, and the weight of the car overcame the mechanical leverage of the motor and the car rolled back and skipped timing.
     
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