PCV Valves and Grommets

11/26/2014 9:52 PM | Anonymous member (Administrator)

PCV Valves and Grommets

Many Miata owners change their oil and filter regular as clock work, but how many of you have replaced the Positive Crankcase Ventilation, PCV, valve?

This valve regulates pressure in the upper part of the engine and should be replaced every 30k miles as a preventative maintenance item along with the rubber grommet that fits into the cam cover. 

This is found on the intake manifold side of the engine. It is pushed into the cam cover and has a 10 mm hose running from the PCV valve to the intake manifold. Simply grab hold and pull the hose away from the cam cover and the valve will come out of the grommet in the cam cover. You can now remove the grommet from the cam cover with a pair of needle nose pliers and remove the PCV valve from the hose. Install the new grommet into the cam cover and then the new PCV valve into the hose and re-attach them. Don't try to fit the valve and grommet into the cam cover together, the combined diameter is too large to easily press in. Trust me, I tried. :-) 

Expect to pay under $25.00 for the Mazda parts and about half that for generic ones.

Address: PO Box 396, Portland, Oregon 97207

Email: zoomzoom [at] mthoodmiata.org

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