Question about Distributor cap/Rotor replacement??
Unless you have some mechanical default with your distributor cap and/or rotor then you shouldn't need to replace either. Their designed to have an understandable amount of wear while still allowing the most optimal transference of potential difference to the plug.
I realize that both parts are relatively inexpensive, but what reason would you follow the books recommended maintenance only because it tells you to change out the part? In order for the parts to show any recognizable signs of duress through engine performance, you would have to have a faulty part or mechanical issue which then worries me of other, more important, engine issues. I wonder how much you would allow your wallet to be raped simply because the dealer told you any procedure was recommended.
Any comments will be most appreciated. Thanks