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Old 12-15-2014, 10:59 AM   #214
DavidG
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Join Date: May 2010
Location: southeastern Michigan
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Default Re: 1933 can't start after recent restart

Mart,

Because the nut is slightly recessed relative to the opening in the cylinder block, an open end wrench of a length sufficient to provide the required leverage won't fit properly on the flats of the nut and the result of using one is often seen on badly damaged nuts where such a wrench was used. (Hence my comment above about the pristine condition of the nut on Frank's camshaft.) The only safe tool to use is one like that depicted in Charlie Stephens photo posted earlier in this thread. I understand that Frank has one on order and expects it arrive shortly. It is a single purpose tool, but more than worth its price in avoided frustration.

Once he has the tool in place the timing gear will rotate until its undamaged teeth engage the teeth of the gear on the crankshaft at which point he should be able to unloosen the nut. He may shear off a few more timing gear teeth in the process, but it is highly unlikely that he will shear off all of them. Additionally, if there is some seizing of the camshaft such as a rust-frozen distributor shaft, that would assist in keeping the camshaft from rotating while unloosening the nut. (Frank is lucky that he has a four in this instance as the timing gear is not pressed on, unlike the timing gear of a V-8 of that vintage.)
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