karayjay

I have change my expansion plugs last year because I had an oil leak on the drivers side head cly that occurs in the winter only when it's cold out 30 and below. I seen to have come back in the passenger side now ...I have seen some pictures of a large black piece fairly large with 4 screws what is that? could it be leaking there if so what it the part called and what is it the one in the picture that has the screw showing not the expansion plug

Rudeney

It's the oil centrifuge. You have to replace the entire cover as the gasket is built onto it. You can get an aftermarket part for about $20. I bought on on Amazon for my SL550.

karayjay

How hard is it to install any one ?????

Rudeney

You'll need an E-Torx socket, and preferably one that is very shallow. I like the Sears Craftsman Max Axess set for this. Once you have the right tool, it takes about 10 minutes.