I appreciate your input". WHEN you say you filled?? Are you saying very generously?? Cause I'm planning to

 

Yes. I have a 3oz tube of di-electric grease. Roll it from the botton and squeeze a goodly amount into both ends of the boot. This will ensure the boot spring and the spark plug terminal are coated as well as the entire spark plug body. You also want a good connection at the coil pack. I noticed minor rust forming on the screw of each coil pack that makes contact with the spring. I scraped them all clean before attaching the greased boot. They key is good, clean contact for efficient voltage delivery to the spark plug.

Whenever I'm working with grease, I never skimp. Also, since our trucks require spark plug changes every 30K miles, it makes sense to keep a 3oz tube on-hand.

 

I've changed four sets of plugs on my Hemis. Fortunately never had a problem with the plug boots.

 

Thanks for the input, well, read my update.

 

Really very good info...Read my UPDATE I was very very generous with it.. Thanks for your thoughts and input I do appreciate it
question, how did you clean the bottom of the coil boot showing the rust.