Northstar Engines and System Technical Discussion Discussion, 2001 Deville N* Spark plug boots questions in Cadillac Engine Technical Discussion; I am changing the spark plugs and plug boots on my '01 Deville Base. I have a few questions:
2001 Deville N* Spark plug boots questions I am changing the spark plugs and plug boots on my '01 Deville Base. I have a few questions: I haven't been able to find much info concerning this and this is the first time I have been exposed to coil packs and spark plug boots. Which end do I put the contact spring into? When I put he contact spring in, do I need to push it through the narrow part of the boot or will it push through on its own? Do I need to use dielectric grease on the spring ends? Re: 2001 Deville N* Spark plug boots questions Plug boots, spring centered internally ........ Thanks Sub. Should I use some kind of lubricant like dielectric grease or silicone spray? Re: 2001 Deville N* Spark plug boots questions Most new boots already have a dab of dielectric in the lower tips. A judicious smear in the upper 1/4", where the coil cassette tower sticks in, would hurt nothing.
If you found one or more plugs with some oil on the metal shell or insulator, that's pretty normal - the O-ring seals in the cam cover wells weep over time. Not a problem.