Nissan 3.5L Valve Cover Gasket Spark Plug Tube Seals “Not Serviceable”

In this video, I will show you why your Nissan 3.5L Valve Cover Gasket Spark Plug Tube Seals are not serviceable.

It is not uncommon for the spark plug tube seal to start leaking oil down into the spark plug holes and cause misfire codes like p0300 and p0302. Unforchinely on Nissan 3.5l engines, the whole plastic valve cover needs to be replaced.

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When spark plug well gasket wears out and starts leaking, engine oil gets inside the spark plug well and eventually leads to cylinder misfire. In this case, the valve covers needed to be replaced.

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