When to replace the valve cover on a Nissan?
When to replace the valve cover on a Nissan? Dealing with the two bolts on the rear of the intake collector is a PITA the first time. The tube seals are built into the valve covers. If you have an oil leak in the spark plug tube, replace the valve cover as well. RTV the corners of the gaskets as you will read in some of the links I have provided below. Do you need to replace the intake plenum gasket? RTV the corners of the gaskets as you will read in some of the links I have provided below....