Re: OMC vs HF flywheel puller

[richardg]

The OMC Puller has a nice flat on the center bolt where it contacts the crankshaft that is less likely to spread the crank shaft threads the way the pointy section of the harmonic balancer puller does.

I still try to use a thin nut on the top of the crankshaft to prevent damaging the threads when pulling a flywheel since I have found a relatively large number of crank shafts with the first few threads distorted out.

When I find a crank distorted that way I have some high end dies that are split so you can expand them a bit, usually get them threaded on anyway, the once threaded down a ways, return the die to the proper size, then back the die up to cut down the distorted top section of the threads.