Re: Harmonic balancer info

Posted by HH56 On 2014/4/7 17:21:29

The 53-4 factory AC crank drive pulley was two groove, cast, and bolted onto the vibration damper with a couple of bolts over the PS pulley. IIRC, there were some spacers or washers also involved. Diameter was roughly 6 inches or about an inch less than the PS and fan pulleys.

I doubt there would be enough sold to make it worthwhile for any production so perhaps a one off could be turned as needed for a reasonable price if someone were interested in doing it. The need for the original two grooves is debatable with a modern Sanden compressor so doing a single groove would probably simplify things a bit.

I have no idea what is involved in turning such an item on a lathe but Nordstrom seems to have successfully done it for the V8. Pricy though. Too bad those won't work for the older engines.

I'm almost wondering since the older pulleys bolt on with two bolts if an adapter plate of some sort could be made to locate properly on the damper and bolt on. Once that was fastened then a standard bolt on brand X pulley could be bought and fastened with more bolts to that adapter. Seems like making a couple of bosses or recesses on round stock and drilling and tapping some holes in a relatively flat piece of metal would be easier and cheaper than turning a complete pulley -- but I've been known to not see the obvious so probably more complicated than I think and balancing the combination might be a problem.