engine timing

Discussion in 'Mazdaspeed 3/6 Engine' started by Brian MS3, Feb 16, 2016.

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  1. Brian MS3

    Brian MS3 Greenie N00B Member

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    I'm currently timing my engine and while torquing and stretching the crank bolt I didn't notice that the bolt that goes through the crank pulley had bent slightly. This made my cams just a cunt hair off. is there any margin for error with this kind of thing or should I buy a new crank bolt and start over?
    Thanks in advance 20160216_195106.jpg
     
    Brian MS3, via a Samsung mobile device, Feb 16, 2016
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  2. Gandalf

    Gandalf Greenie Member

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    Start over, why take the chance.
     
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  3. Mzr0818

    Mzr0818 Local Parts warehouse Silver Member

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    Yes you need to reset. Make sure the bolt through the crank isnt to long it is more likely to bend, also have someone hold the cams in place helps relieve some of the movement on the crank.
     
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  4. 865ms3

    865ms3 Greenie Member

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    I use a grade 8 bolt to lock the crank instead of the flimsy little pin that comes in the timing kits(make sure its the exact same length). lock the crank down. torque to the first torque value. spin the crank a few times and double check timing. if thats good i go ahead and do the final torque on the crank bolt with the lock in place and the cam plate removed. double check when done. Replace crank bolt and friction washers if you have already done the final torque.
     
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  5. phate

    phate Motorhead Silver Member

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    DON'T USE THE M8 BOLT TO HOLD THE CRANK PULLEY. Sometimes you bend and break the bolt (if you're lucky):

    [​IMG]

    Other times you blow out the timing cover bolt hole:
    [​IMG]

    Yes, sometimes you can get away with it. I've gotten away with it. I highly recommend getting something to hold the crank pulley in place.


    For that cam timing tool, slip some feeler gauges in to true the cam to the plate:
    [​IMG]
     
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  6. Patrick Martz

    Patrick Martz Greenie Member

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    thats not a cunt hair lol. Thats a god damn quarter inch off. I would be surprised if the motor ran right with it being that off. Gonna have to start over. Like said before get a nice strong grade 8.8 bolt that isn't too long.
     
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