[Lowell W]

Why is cam/distributor gear wear such an issue on (some of?)these motors when the stock motors routinely go 100,000+ miles without problems?

I wanted to check the amount of wear/slop in my distributor after 9500 miles but didn't want to pull the distributor. I also wanted an easily repeatable method of checking and measuring the amount of wear from time to time without having to go through setting the timing, etc. I mounted a dial indicator to the distributor housing with the plunger bearing on one of the pivot pins for the advance weights. At this point, I measured .025" of rotational play. Since this is approximately one inch from the center of the shaft, it seems to me that this is reasonable but the best way to tell will be to check periodically to see whether this measurement increases and, if so, by how much how fast. This is a Comp hydraulic roller cam with a steel gear on the MSD distributor.

Anyone have any similar experience? Comments?

Thanks,

Lowell