Report: valve covers
Infiniti G35 Problem
Model Year Affected: 2005
Average Mileage: 90,000 mi (90,000 mi - 90,000 mi)
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!