The Stovebolt Site Forums The Shop Area Engine Shop Horrible Sound from my 261

I removed the flywheel shield. The sound (which starts at 1300 RPM and fades away at 1700 RPM with or w/o fan belt) doesn't come from back there.

I used a stethoscope along the block and head and it gets louder up front. The distributor doesn't given much sound (except some zapping noise). The fuel pump doesn't give much extra stethoscope sound either but I replaced it today anyway with no effect. Just hoping and praying.

My clutch pedal has about 3/4" free travel and then the spring is pretty strong, the way I like it.

The balancer is the next thing to consider or pull. I probably should change it anyway because I think the too large pulley diameter is the one that Dave does not suggest for his water pump adapter plate.

My two standby old-timer mechanics have firmly retired. There might be 1 or 2 others in town that I would trust to at least help with the diagnosis.

Doc, I also think these engines are sooo dependable but my 261 is at least the 3rd engine in my '48! The radiator frame was cut once and welded. Then it was cut and not rewelded. So I didn't leave that kind of engine removal history when I removed the 235 and dropped in the 261.

I'll keep in touch but I will be out of state for the next 3 weeks or so but please keep giving suggestions anyway. Thanks for your help!!