The PCV valve is located at the rear of the engine under the intake manifold. It screws into a metal box separate from the engine and about an inch behind it. There is no way to get a wrench onto it. You can find the valve by following a vacuum hose that comes from a rail attached by the bolts that hold the manifold to the head. I don't know how Nissan techs get the thing off unless there is a special wrench. It looks like the intake manifold would have to come off. I found the thing by going to Nissan and looking at their parts diagram on their parts computer.
The EGR valve in a 1997 Nissan Altima is located at the top of the motor in a position near the firewall. The EGR valve is held in place by a vacuum line and 2 nuts.
In a 1997 Nissan Altima, the transmission dipstick is located next to the motor. The dipstick has a red handle to pull out.
On a 1997 Nissan Altima the water pump should be mounted on the front of the engine. It is right at the thermostat housing.
where is 2005 Nissan speed sensor located
Under the passengers seat.
how to remove a power steering pulley on a 1997 Nissan altima
under the hood
On the firewall on the driver side under the hood.
tell me about ideal air control valve
How do i reset my anti-theft system in my 1997 nissan altima se?
1997 Nissan Altima with the Automatic Transmission - has 4 lug nuts per wheel
It is 1.0 mm to 1.1 mm or 0.039" to 0.043" You can check in the manual for Nissan 1997 Altima