I have a 1925 model T touring/pickup. The engine was professionally rebuilt several years ago and probably has 10 -12,000 miles accumulated to date. It has a persistent noise--kind of a cross between a knock and a clack that appears to come from the transmission area. It comes in at around 15mph and stays throughout the speed range. Changing the timing does not alter the noise. Heavy lug does not change it. High speed does not affect it--no better, no worse. I have removed the engine once and checked the rods, mains, timing gears etc but the noise remained healthy. The recent threads on triple gear pin fitting got me to wondering if that could be a possibility. How do triple gears fail?? Do they get noisy before failure?? My understanding is that the triple gears and pins rotate as a "unit" with the flywheel when in high gear so that got eliminated from my thinking. Any suggestions or ideas?? Thanks for the help. Dewey
Have you checked the U-joint?
Does the noise change when you are in low or high?
A noise you might be hearing that sounds like a clacking is loose wood spokes in the wheels. So you might check the spokes.
I'm with Larry on this one. Lots of noises that the engine gets blamed for actually come from the rear drive train. I have a '26 that I changed the u-joint on a couple years ago and my knock went away. My '26 engine was used by a friend for the '09 Ocean-to-Ocean Tour and ran like a Swiss watch all the way. I was a bit dubious about lending it to him because I wasn't sure it was in shape for that run but I was wrong.