Not 100% sure about the '87, but there is no PCV valve on the 1986 Volvo 240 2.3L. Flame trap and Oil trap, but no PCV.
The PCV valve on a 2004 Volvo S40 is located on the engine crankcase. It is a small rubber valve.
Behind the intake manifold!
The PCV valve is located in the engine area on the 99 Volvo S80T6. It is important to carefully study the user manual which has an illustration of the same.
check PCV, oil separator under the manifold and all pcv vacuum lines.
pcv system is clogged up.
I am presuming you mean the pcv valve, it is in the valve cover.
in what location can I find the pcv valve on my 2002 chevy tahoe
Did you ever find the location of the pcv valve?
You can find the PCV valve, on the outside of the air cleaner housing. The PCV valve will be attached to the back of the housing.
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.
You can find the PCV valve for your 1997 Mitsubishi Montero on top of the engine. The PCV valve will be in front of the air cleaner housing.