Burned Coil Pack and Spark Plug (plug was good and tight)

[Infinity00]

Helping my buddy change his spark plugs and we came across this on the passenger side, 3rd cylinder in from the front (sorry I don’t know which one it is). Spark plugs probably have 90,000 on them and were OEM denso SK2OR11, replaced with same. A small amount of oil, and I mean maybe a drop was on the coil pack but it looked bad! All the others looked fine, with the exception of one plug have a small amount of burn on the porcelain and a browned tip on the coil pack but otherwise they all looked fine, with tan tips…
Edit: no misfire codes that I know of

Advice?

What should he be looking at? Replace it? And / or maybe valve cover gasket/plug seals???

 

[NolaNomad]

'06LX470- my #3 looks just like this, coil has a crack up the seam as well.. I'm looking at my valve cover gasket leak as well... poured 1 1/2 bottle of AT-205 yesterday to help with the gasket..

 

[Infinity00]

'06LX470- my #3 looks just like this, coil has a crack up the seam as well.. I'm looking at my valve cover gasket leak as well... poured 1 1/2 bottle of AT-205 yesterday to help with the gasket..

I love that stuff, used it a lot in my steering rack but haven’t put it in the oil before for the valve cover gasket. I’ll research that.

 

[leveeguy]

With the appearance of oil being towards upper end of the boot seems this is more likely the spark plug tube seal that is responsible for this oil so replacing spark plug tube seals and valve cover gasket at the same time would be best idea. And checking/retorque valve cover bolts periodically over time to help keep those gaskets snug

 

[NolaNomad]

With the appearance of oil being towards upper end of the boot seems this is more likely the spark plug tube seal that is responsible for this oil so replacing spark plug tube seals and valve cover gasket at the same time would be best idea. And checking/retorque valve cover bolts periodically over time to help keep those gaskets snug

Doing this^ and all new coils and plugs is my next big thing- Just seeing how the AT-205 holds up, so far still leaking.....

 

[NolaNomad]

I love that stuff, used it a lot in my steering rack but haven’t put it in the oil before for the valve cover gasket. I’ll research that.

If you suspect the VCover-snug up the cover bolts, the gasket gets compressed so tightening the all that might help the leak(presumably if thats the case)