dickass

hi my uncle recently gave me a 98 nissan, it had 230,000 k miles and now i have put on about 240,000. he said he never put on a new pcv valve and didnt really mess with other stuff either like shocks or misc engine parts. so i know its a good idea to replace the pcv valve, but the thing is i cant find it. my step dad and i looked. i even bought a manual "haynes" and it said its under the power streeing pump, looked there and found nothing. anyone here have the same car or simliar or knows where the pcv valve goes? i would truly appreciate it. i would like to know where it is located and what its attached to thanks