It's a pain in the rear, because the pcv valve is located on the rear of the engine next to the oil filler. you have to remove the top portion of your engine to get to it.
The manuf. way of having you bring the veh. back for service.....
P1148
How to remove the front bumper to a 1998 Nissan Altima?
the valve cover gasket is bad, or the valve cover is loose
What do you torque the head bolts on a 1998 nissan altima 2.4 l
The crankshaft sensor on the 1998 NISSAN ALTIMA is located next to the radiator side of the harmonic balancer
timing chain diagram for 1998 Nissan altima
where is the oxygen sensor in a 1998 Nissan altima 2.4gxe
hammer
Motor
1
Below
This should answer your question? I used it to help me replace mine on my altima. forums.nicoclub.com/zerothread/157923