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Harmonic Balancer Bolt Size
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Author:  nate_o [ Thu Jan 26, 2006 9:09 am ]
Post subject:  Harmonic Balancer Bolt Size

Does anyone know the size of the bolt that would screw into the crankshaft so you can install the harmonic balancer?? This is on an 81 slant. Thanks

Author:  relic-lover [ Thu Jan 26, 2006 9:45 am ]
Post subject:  Crank Pulley Bolt

It is 3/4 inch diameter fine thread 1 1/4 inch long. There is a thick washer
also about 1/4 inch thick. I used a clevite kit for a mopar SB.

The 1 1/4 bolt would not quite pick up the threads, since my balancer would not slide onto the crank at all. I got a stack of washers and 2
longer (1 1/2 and 2 1/2 inch) bolts to help put mine on.

I found later I had to remove the bolt to run my 61 170 motor.
The stock 4 blade fan damn near scraps the front of the pulley.
Not even enough room for the bolt head to clear the fan blades.

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