how do u no if u need to replace your PCV valve?

 

I change mine when I got the extra five bucks to do it, but most folks probably never change it until you get oil pouring out of the dip stick tube from built up crank case pressure.

 

Some may (and probably will) say otherwise, but a rule I learned about them is, as long as they rattle when shaken (ie. not clogged or carboned up) they are fine. Of course preventative maintenance doesn't hurt...

Pete

 

Theyre so cheap id just pick something you have to do at semi-regular intervals (some form of fluid change or something) and just do it regularly even if it doesnt really need it....better safe then sorry

 

Yep; I change mine out once a year, part of the major tuneup... for something that cheap, might as well change it and forget about it.

 

I worked in lube shops for over 2 years as management, and now work at a buick dealership and have learned the PCV valve are recommended to be changed every 10k-12k miles, normally when you change the air filter.

 

where is the pcv valve and what does it do?

it sounds easy to replace, mine hasnt been fiddled with for a long while so i want to replace it.

i dont care if i ask stupid questions as long as i dont get stupid answers

 

Some of you may have already read the long, tedious story I have about significant problems with aftermarket PCV valves. Suffice it to say that I generally clean the PCV valve and inspect or replace the tubing at least once a year. If you cannot clean you valve to your satisfaction, at the very least, replace it with ONLY a genuine factory part - especially on speed-density EFI engines, like later TPIs, MPFIs, and TBIs. Air flow calibration through the PCV is critical to the SD systems' presumptions about intake air at a given MAP and TPS. Factory units are actually flow-tested in production (I worked for a company that made them for GM).

 

Ditto.