Rough running 1937 115-c

Posted by David rose On 2016/1/18 11:52:20

My 37 seems to be rough running or has a viberation at medium rpm . The distributor rebuilt, compression is 115 + - 3 lbs, valves adjusted were ok, vacuum 18" and steady, oil pressure 32-35 psi. Timing at 4 btdc . No knocks in motor ? . Would a harmonic balancer do this ? . Another thing the clutch was replaced by a previous owner of this car and I discovered that a spring was missing in the clutch disc. It was a rebuilt disc with little ware on the lining but the spring holder had broken out and the spring was gone, removed by previous owner and cover replaced. 😟 . So my disc core is no good , but my throw out bearing and holder are real good as the pressure plate also is good. New or rebuilt ? I now have installed a new disc hoping this was my shake , but it was not ! . More surching I think that my bearing holder and bearing fit a 1939 120 the reasion I think this is 1938 120 owners manual pg 18 tells that the clutch shifter bearing holder has a oil hole in the top of it. That is what I have . Now could my flywheel and assembly from a 120 ? ,.throwing it out of balance ? Are thay interchangeable or what part years fit. I have also installed new motor mounts , Any ideas and help thanks Dave