In Reply to: Distributor dust cover posted by Don U ( IN ) on January 31, 2018 at 09:27:17:
Dust cover and neoprene O ring on both 51 and 52 8Ns.
No issues of any kind but one must finesse the dust cover to seat properly allowing proper seating of the distributor cap.
Both dust cover and O ring are needed to establish proper seated dimension of the cap.
Yes, always remove the rotor spring clip before removing the cap.