Last night, we installed the crankshaft fan belt pulley on our 1922 engine. Once the crankcase was installed, we found that the pulley had a significant rub on the rivets holding the front plate to the crankcase. The fan belt will never go on. The pulley that was installed is about 3 1/2" diameter, which I had thought was the correct pulley. I noticed that the vendors sell a 3" pulley, which should give plenty of clearance. Yet the vendors say the 3" pulley is for 1919 and earlier pans. I saw in Bruce McCalley's book that in December 1919 the fan pulley was changed, but didn't see a change in the crankcase. Could I have an earlier crankcase? How can I tell? The only way that the larger pulley would work is to completely remove the rivet, I don't want to do that, so I'll have to find the smaller pulley.
Any way to post a photo of the c.c. nose ?
Here are the early and later pans. The one with the short nose is from my 1915 roadster. The pan with the long nose of from a 1923 engine.
I used the wrong words. I should have said the narrow nose is earlier, and the wider one is later.
You should be using the 2ed one shown by Jeff for a 22. If you are using the narrow nose pan and want to keep it you are going to need to get the smaller pulley.
Here's a picture of the front of the pan.
Look's like Steve 1915 pan.
Another difference is that the later pan has a reinforcing curl along the edge and the earlier one doesn't.
The narrow nose pan that you have for your 15 is really correct for a 13/14. The 15 narrow nose pan has the reinforcing curl like the later pans.
les! I've been in t"s 40+ yrs. never seen a narrow nose pan with the curl on the edge??????? charley