The International Cessna^® 170 Association

I recently had my C/S prop dynamically balanced. The results were very good. I noticed a smoother feel enroute, but also noticed much less vibration even as I taxi. My vert card compass seems steadier and wing root air vents are quieter.
My next thought along the lines of a quieter smoother ride was to check the engine mount bushings. Seems to reason that old, hard or cracked bushings would transmit more vibration to the airframe. My O-360 conversion was done in 1974. I'm sure they must be hard and worn by now. Can anyone tell me how much work is involved in this improvement and recommend the best bushings? Do you have to yank out the engine, or can you change them one at a time? I've heard of the Lord mounts. Are they better than "stock" bushings?
I would appreciate anyone's ideas on this one.

Neil

"Lord" is a manufacturer (and patent holder) of certain types of engine mounts and has become a household word like "Kleenex" (whose WW-I gas-mask filters became widely used as facial tissues) and "Xerox" who held the original patent for heat-sealed static-image photocopies.
Any engine mount that's 18-years old is way past it's design life. It's supposed to changed at recommended TBO or it's chronological equivalent. (12 years, max according to some literature.)
Consider changing out all your flexible hoses and copper lines at the same time. They both become brittle, flexible lines due to heat and age, copper due to vibration.
You can probably use an engine hoist or lift to suspend your engine while the changes are made.