Oil in rear knock sensor plug?
 

I got the knock sensor code. And right now doing the replacement. Up on removal of the rear knock sensor plug I discover that there is oil in the electrical plug and around bushing that covers the sensor. The walls of the sensor well and the sensor itself are dry. I have not removed the sensor yet (didn't have the right size socket)

Where could the oil have come from?
Should I be worried?

Thanks

01 Camaro, Auto

Wow, what coincidence! I just changed knock sensors today-did the RTV dam thing to try to reinforce the seal-but yeah, found that some oil had fouled the knock sensor.

I do know the oil level is fine, but pressure is awfully high. Going to correct this in the morning with an oil change hopefully.

Anybody have input?

http://a2.sphotos.ak.fbcdn.net/hphot...29639116_n.jpg
http://a7.sphotos.ak.fbcdn.net/hphot...30319076_n.jpg
http://hphotos-iad1.fbcdn.net/hphoto...07832267_n.jpg

looks like you just need new valley cover seals.

Old cracked seals will do that. Pop in some new ones.

D'oh!, now I wish I bought that ls6 valley cover :-(

I decided to post my pictures too. It seems that I don't have as much oil as JekHawkins.

There are no signs of corrosion on my sensors, I forgot to take a picture of them. BTW I had code for bank 2 sensor, and it would go away if I drove car on daily basis. The body of my rear sensor is dry except the very bottom , there is a drop of oil on the threads and on the top at the plug. The front sensor looks almost new the rear looks like the one on the right in JekHawkins pictures.

The plug from the rear sensor is oily and smells like kerosene, where can that come from?

Another question that comes up will the oil damage the sensor? If it doesn't I 'll just finish everything tomorrow, If it does than I have to wait for stealer to open Tuesday :-( and order seals and wait for delivery that will take another week :-(