It’s basically showing you that it’s time for a new cap.
Distributor Cap contact nicks?
Le Mans Master
Joined: Nov 2015
Posts: 7,479
Likes: 2,650
From: Really Central IL Illinois
My guess is factory defects. Other not likely problems, cap not latched on squarely, rotor contact, bushings worn, etc. but would expect it to be chipped across the total face of the contacts.
Race Director
Joined: May 2006
Posts: 10,941
Likes: 478
From: EAST TENNESSEE
Team Owner
Joined: Apr 2008
Posts: 31,843
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From: Middle TN by way of KY, OH, VA, IL, CA, FL, NY, SC, HI
We used to just file them lightly to smooth them out, including the rotor button contact, just like we filed points back in the day, and kept using them. Just don't significantly reduce the contact thickness, as that would increase the gap the spark needs to travel. As long as the engine is firing correctly, they're fine even if not pretty after awhile.
Thread Starter
Burning Brakes
Joined: Aug 2018
Posts: 1,012
Likes: 172
From: Justin, TX
I guess I just never noticed it before. I'm going with "factory defect". Order a ACDelco Distributor Cap - D308R. Made in Warren Michigan or Kung Pow... I'll check either way
Race Director
Joined: May 2006
Posts: 10,941
Likes: 478
From: EAST TENNESSEE
We used to just file them lightly to smooth them out, including the rotor button contact, just like we filed points back in the day, and kept using them. Just don't significantly reduce the contact thickness, as that would increase the gap the spark needs to travel. As long as the engine is firing correctly, they're fine even if not pretty after awhile.
I did the same years ago,had to stretch every dollar?
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Thread Starter
Burning Brakes
Joined: Aug 2018
Posts: 1,012
Likes: 172
From: Justin, TX
