Please help! My 2010 Infiniti G37 4 door sedan had oil in the spark plug when I changed them a few weeks ago in piston 6. I changed the spark plug but still had issue so I changed the ignition coil but still had the problem. I bought new head cover gaskets and spark plug gaskets. I was taking the heads off when I found oil completely covering the inside of the engine under the valve cover of the driver side. I took the passenger side off and found the same thing. I’m stuck on what it could be and I can’t afford to have a mechanic work on it to be honest so I am at a stand still. Please let me know what you think it could be. Thanks Scotty!
Oil under the valve cover is normal. If you think it is excessive, check the drain holes. On the other hand, you shoulld not have oil inside your plugs. If you still see oil inside the plugs, you likely have worn rings, or have issues with the head gasket and/or valve stem seals.
Yaser,
do you mean worn piston rings?
If it’s in the spark plug tube your problem is going to be the tube seal on the cover. Generally not serviceable separate from the cover . You may be able to get the tube seals aftermarket but they are not meant to be taken out of the cover so I would recommend to replace the valve cover
R4nier,
Are you referring to the spark plug tube gaskets? When I ordered the valve Cover gaskets it came with a pair of spark plug gaskets as well.
Those are what I’m referring to. That’s strange because they aren’t meant to be serviceable from the dealer it’s not even an option to buy them apart from the complete cover