Oil in spark plug tubes

I have a 2012 4.6 tundra with a small issue. Maybe one of you can help me out here. I changed my spark plugs at 98.000 miles and there was oil in 2 of the spark plug tube. The dealer said it is coming from the cylinder heads but I can't get them to replace them with my warranty. They said it is normal. Has anyone else had this issue?

 

Sounds like the bullshit I was given with my Silverado with 40K miles.

1. Why is my truck burning oil? Answer: Oh its designed to burn a quart of oil every 2000 miles.
2. Why are my spark plugs covered in oil? Answer: Oil fouled sparks, Oh that's normal.
3. So your not going to do anything about this? No, its all normal.
4. Drove to Toyota and traded it in.

 

Normal NO.

sounds like your valve guides have gone bad. Warranty nope your over miles.

Keep a eye on it if it get worst head will need to be pulled so the valve guides can be replaced.

 

Fortunately I don't have that kind of problem. This is the only issue I have ever had with the tundra. It has been a great truck . I Have Had Ford AND Chevy. Both left me on the side of the road.

 

My father in law mentioned valve guides. I thought the valve cover had a seal that might have been bad but toyota said it doesn't have one. They said it has a metal seal that is pressed fit into the heads.
Thanks

 

Tube seals on valve cover leaking.

 

I can tell i need more coke cola in the morning on my only day off. UGH

I was thinking you had oil on the inside on engine piston side. ( my fault) .. You have oil on the outside of the plug. garnaz is correct your tube seals are bad.

 

What's normal is dealers telling customers that everything is normal, in hopes they will just go away.

 

About 6 months ago I finally had my plugs changed in my 2012 4.6L at 200K miles. Same issue of oil in the tubes. my buddy works at the dealer so I asked him how long they thought oil had been in there. He said probably around 100K miles. I didn't fix it cause it didn't seem like it was really hurting anything. Since then I have another 30K miles and zero issue and no leaks or missing oil.

 

It's probably the tube seals in the valve cover like someone else said.... not hard to replace. Grab a couple cover gaskets and 8 tube seals and make a morning of it