Green crud on spark plug

[Pedlow]

Engine light came on so I plugged in the obd reader and it said misfire cylinder 4 so I pulled the plug out and had a bunch of lime green crud on it, does anyone know what this is can't find anything on it.

 

[Diggs24]

Looks like dielectric grease.

 

[sfbell3]

Agree with Diggs. When you replace your coil packs next time you’ll see they stick some of that inside the boot.

 

[Handguns4heaRTs]

My stock ones had the same stuff on them, but it was on the ceramic, not the terminal

 

[MonkeyMD]

Has Hoon worked on your car?

 

[PowerDemon]

It's some sort of dielectric grease. The insides of the coil packs are coated with the stuff.

 

[THEREALVRT]

You’ve been slimed.
Call ghostbusters!

 

[2slowvw]

Looks like dielectric grease.

Indeed it is. If you buy new coilpacks you will see it comes prefilled with some. It is ok and preferable to have some in the coilpacks, just not excessive amounts all over the contacts where it wont let electricity flow

 

[JSUN1]

I had some grease (dielectric) on my spark plugs (Alltrack) BUT I also noticed this red sticky stuff on my spark plug socket when I pulled the plugs, it had to have come from the deep bore that the coil boot fits into. I'd like to know what that red stuff is. It was very thick and sticky I had to use Simple Green to clean it off y spark plug socket. This was the first time changing plugs. Does anyone know what the red stuff is?

 

[ChrisMk77]

I had some grease (dielectric) on my spark plugs (Alltrack) BUT I also noticed this red sticky stuff on my spark plug socket when I pulled the plugs, it had to have come from the deep bore that the coil boot fits into. I'd like to know what that red stuff is. It was very thick and sticky I had to use Simple Green to clean it off y spark plug socket. This was the first time changing plugs. Does anyone know what the red stuff is?

Valve cover/cam girdle sealant