![Ask Away! with Jeff Smith: What Causes Distributor Cap Corrosion and Deposits (and How Can You Avoid Them)? - OnAllCylinders Ask Away! with Jeff Smith: What Causes Distributor Cap Corrosion and Deposits (and How Can You Avoid Them)? - OnAllCylinders](http://www.onallcylinders.com/wp-content/uploads/2016/07/22/ASK-07-02-B.jpg)
Ask Away! with Jeff Smith: What Causes Distributor Cap Corrosion and Deposits (and How Can You Avoid Them)? - OnAllCylinders
![New distributor cap has black plastic on the contact. Wouldn't that cause it to not work? This is what contacts the metal on the rotor button, and the old cap isn't like New distributor cap has black plastic on the contact. Wouldn't that cause it to not work? This is what contacts the metal on the rotor button, and the old cap isn't like](https://i.redd.it/yyp7n8ot8on91.jpg)
New distributor cap has black plastic on the contact. Wouldn't that cause it to not work? This is what contacts the metal on the rotor button, and the old cap isn't like
![Distributor Cap Rotor Kit Tune-Up Kit For Marinized V-8 engines with Thunderbolt IV & V HEI ignitions 805759Q3 805759T3 18-5273 - AliExpress Distributor Cap Rotor Kit Tune-Up Kit For Marinized V-8 engines with Thunderbolt IV & V HEI ignitions 805759Q3 805759T3 18-5273 - AliExpress](https://ae01.alicdn.com/kf/S224f4a9b2b624eef959a3b2e3729cb169/Distributor-Cap-Rotor-Kit-Tune-Up-Kit-For-Marinized-V-8-engines-with-Thunderbolt-IV-V.jpg)