So, after 50 or 60 years, your balancer has bit the dust? We present the following as a guide to those unsure if their pet project needs a balancer rebuild.
If your engine has been running and the timing can be set reliably, that's a sign that your balancer is still in good condition.
Some balancers have minor cosmetic needs, but are in very good condition and do not need rebuilding. A cosmetic condition that often occurs is the extrusion of the original rubber, forming a bulge or ridge on the balancer. This can be easily trimmed without affecting the balancer or rubber adhesion.
If the surface appears to be shiny and resilient when gently poked, this indicates a good overall condition.
Another self-test is the shaft seal surface. Sometimes the shaft seal will wear into the hub surface, causing a groove to form. This could result in constant oil leakage if not corrected. Check by looking for a worn area, or ring, where the seal rides. Run your fingernail over and along the ring. If a ridge can be felt, it's time for a shaft repair sleeve.
We hope the above will provide useful info to our potential customers. Thank you and Good Luck with your pet project!