Common thing on these. It’s nothing to worry about.

 

But what is causing the oil on the thread? only one spark plug. Is there a way to fix it?\

 

It’s the tube seals most likely. They come in a set with a valve cover gasket since you have to take the valve cover off to replace them. I would replace all of them so that way it’s done especially since they come with all 4 of them for each tube.

 

No need to remove the head. It’s on the valve cover. So get the gasket set and replace it and you can pull it off by hand or a seal puller.

 

I bought this valve cover gasket . But I could not find any spark plug tube for 2003 camry 2.4. and I cannot figure out where they are located.

Valve cover gasket replacement video

In above youtube vodeo the person opened the valve cover but I do not see any spark plug tube on it. I am just wondering where the spark plug tube could be !! Is it underneath the head?

 

You see the gasket. It has them built in. The four circles in the center are the tube seals.


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The "tubes" are part of the valvecover. The seals are integrated with the gasket. If one of the tube seals is bad, oil will leak past the seal and into the spark plug well. Watch from about 11:30 to about 12:30 in the video and you'll see what the deal is. Cheers!

 

Yes the above is correct it’s part of the gasket itself so be sure to remove the old ones before replacement