Prof

Folks,

I knew this but have forgotten, what is the paste that needs to be smeared inside the COP boots?

Is there a video or description of how much to smear, and the most efficient way to do it?

Thanks...

lewissa81

It's called dialectric grease. You should be able to find it at any auto parts store. You don't need a lot of it, just enough to seal up the boot to plug joint and coat the spring contact points.

Mod (Ret.)

And, it prevents the boot from "sticking" on the plug for future removal.

Prof

So, should I remove the boot from the COP, smear the grease with cotton swab, and replace the boot around the spring or do I run he risk of deforming the spring that way?

grss429

Not too sure but i think you just pull coil off swab grease in the boot and on the spring

lewissa81

That would be fine. You can also clean the contact points of the spring to the coil then. I use a small paper finger nail file cut to size. Put a small amount of dialectric grease there also.
Something to consider, if you just changed the plugs or are chasing a misfire, replacing the boots is recomended.

Prof

I just saw a YouTube vid where the guy packed the boot with grease, I assume this to be bad, correct?

lewissa81

It probably wouldn't be detrimental. The point of adding the dialectric grease is to keep moisture out of the actual points of contact. Moisture would cause corrosion and make it harder for the electricity to transfer from coil to spring to plug. More grease doesn't necessarily mean more protection. Too much grease can separate the points of contact. There will be a small layer between the spring and plug, for example. That will just make it harder to transfer the energy basically. Even that is so small, the average mechanic, home or professional, probably won't be able to measure it. So don't worry too much about messing it up. Just put a dab on the end of the boot, smear a tiny little bit on the plug, and you'll be fine.

techrep

iTrader: (1)

Yeah...dont get carried away ...like Lew said a dab on each end of the spring for contact and your good.. no need the mess with the rest of the boot. the boot protects the spring.. I choose to replace my boots and springs when I did my plugs...Rock auto had them for $3 ea.