Quote Originally Posted by 76GMC1500
I found some excessive wear and scoring on my distributor gear when I pulled my distributor today. I do not know what caused it. I replaced it with one I Pick-n-Pulled and will pull the distributor frequently to try and get an idea of the rate of wear as well as the severity of it. The cam drive gear appeared to have some damage, but isn't that bad. I don't really have the money to replace the cam right now. In the future, I may drop the oil pan and if the cam gear is only rough and not severely worn, I will use some lapping compound to match a gear to it and polish the surface. Any ideas on what may have caused the damage in the first place? The distributor shaft is straight and turns free, the vertical alignment of the gear is fine, the oil pump is a high pressure (60psi), standard volume pump and spins free.

That really does not look that bad.
When the gears start to get "knife-edged" that is when it is really bad.