Close

valve covers on Infiniti G35

Problem Description

(9 people reported this problem)

Infiniti G35 Vehicles With This Problem


RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more
Not Your Infiniti G35 Problem?
Brake problem? Or maybe a faulty head gasket cylinder?
Learn About Your Car Problems
Search For a Specific Car Problem
Viewing 1-3 of 3 comments
o-ring gaskets on the valve covers that go around the spark-plug tubes leaked oil into the back spark plugs on both sides of the motor. My husband is a ASE certified mechanic, so we bought gaskets for him to change them. When he removed the valve covers he realized the o-ring gaskets that go around the spark plug tubes cannot be replaced -- they are made to the valve covers! We had to buy a set of valve covers at $600+ to be able to put the motor back together. He's never seen a motor where the o-rings gaskets are made to the valve covers and cannot be replaced. BEWARE!

2004 Infiniti G35 102,000 mi,
Was changing the spark plug when I found oil had flooded the spark plug well for cylinder #6 . So much that I couldn't even see the spark plug. After looking it up it seems like that this is a common problem for these cars. My mechanic/uncle took a look at it and verified that he had done a valve cover replacement for this specific model many times. The only sign that anything was wrong was that I was getting very poor gas milage, I did not have any misfire codes, and my oil levels did not decrease significantly between oil changes. I did notice however that my oil did turn brown a lot faster than it should. If I had not checked my spark plugs, I would probably still be driving around with a bad valve cover.

Valve cover leaks oil. Could leak on spark plugs