hi-torque starter-imi
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hi-torque starter-imi

  1. #1
    snipe hunter breezeblocker's Avatar
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    Feb 2008
    91724 & big river space 84

    Default hi-torque starter-imi

    bought an imi hi torque starter. it is for a 454 chevy, top mount starter bellhousing with a flexplate. it comes with about a 3/8" aluminum spacer that will fit between the bellhousing and the starter , i am trying to figure out if i need to use this or not. cannot check the clearance between the ring gear and starter gear once its mounted. thanks

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  3. #2
    Senior Member jetboatperformance's Avatar
    Join Date
    Dec 2007
    Atascadero Calif


    You need to measure from the starter mounting flat surface on the bell hsg to the rearward face of the ring gear with a dial caliper then check the total starter pinion depth engagement and compare for correct depth engagment (pull the pinion out and hold it to measure) The starter sold you likely fits a few applications (depending on ring gear positioning) and may or may not require the spacer if you don't check it the starter will very likely self destruct and become a box of metallic hamburger , no instructions in the box ? call if you need help Tom

  4. #3
    Senior Member cruzer's Avatar
    Join Date
    Dec 2007
    Chandler, Az


    They are a bit of a pain to get set right. Tom is essentially correct but you can pull the starter out by hand farther than it will go on its own.

    There are essentially 2 measurements that need to be correct on those.

    The first is that the starter drive does not contact the flywheel when retracted. On the starter, measure the distance from the starter mounting flange to the far end of the teeth on the drive. Not the distance to the end of the drive. Then compare that measurement with a measurement of the mounting surface on the flywheel cover to the ring gear on the flywheel. The difference between this measurements is the amount of spacer you will need. Allow for some (0.020?) run out of the flywheel.

    The other measurement is more difficult to get. You need to insure that there is about 0.020-0.025 (I like closer to 0.025 on mine) clearence between the ring gear teeth and the cup over the spring clip on the end of the starter drive. I measured that with the starter mounted and the flywheel off using long feeler gauges. I don't know what your setup is so I don't know if you can do it that way or not. I had to modify the starter mount to get the clearence needed.

    One other thing. These starters rely on the motor to disengage from the flywheel. When the motor starts, the increase in flywheel speed kicks the drive back into the starter. So, don't be suprised if when you crank it and it doesn't start that the starter is still engaged with the ring gear.
    21 Eliminator Daytona. Blown 540

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