on four cylinder engines the pcv valve is mounted in a grommet on the breather seporator (located on the lower timing chain cover on the right side of the engine, below the Power Steering pump).You have to disconnect the hose to even see it. Good luck.
On or near the engine . The engine is located under the hood.
The EGR valve on a Nissan Frontier is on the drivers side of the engine. It is near the firewall, under the intake pipe.
The PCV valve on a 2000 Nissan Frontier 2.4 is on the top back part of the engine. It is attached to the intake manifold via a hose.
The 2003 Frontier 3.3L has an expansions valve, its part of the evaporator.
It is located inside the evaporator case.
the PCV on your 2003 Frontier S/C is on the passangers side Rocker cover(valve cover)
The PCV valve, on your Nissan 3.3 liter, is located on the side of the air filter housing. The valve should be labeled for easy identification.
how can I clean the Idle Air Control Valve on a 1998 Nissan Frontier
You can find the PCV valve for your 1987 Nissan on top of the engine. The PCV valve will be near the air filter housing.
on the backside of the engine
on the right side of engine ,right below valve cover.
It's in the intake one of the bigger hoses that go in. You have to use a wrench to remove it.