I'm taking the intake out. Should I replace the PCV valve?

Hi everyone,

I need to replace the intake manifold gasket on my 1993 Nissan Altima. One thing that I’m not sure about is whether I should install a new Positive Crankcase Ventilation (PCV) valve while I’ve got the intake out. The car has 126000 miles, and apart from running rough at idle due to the leaking gasket, runs fine. Is the PCV a part that will need replacing at any point? Would it be good preventative maintenance, or do you thing it’s not necessary if there are no symptoms of a problem (the dipstick doesn’t jump out).

Of course, if any of you have any other hints and tips to make the job go smoothly, they would be duly appreciated!

Many thanks in advance!


Replacement of the PCV valve is part of routine maintenance. Metal ones can often be cleaned to extend their lives, but plastic ones are better off being replaced. You can buy one for your car for $3.69 at Auto Zone.

The PCV is one of the least expensive maintenance items on your car. If it is still original, go for the replacement.