Honestly, its hard to do an accurate test of a pcv valve. Taking it out and shaking it, as some will say to do, will not tell you anything, except that the plunger inside rattles. It doesn't tell you if the spring inside is controlling flow thru it properly, or if it is keeping oil from going past it. Its a cheap part, replace it if in doubt. How often do you change your oil and what are you using exactly, brand, synthetic or conventional, etc?
White smoke out the tail pipe is burning coolant,best to do a block test before anything else if the coolant is a little low(Napa has easy DIY kits).Other then that it's $5-$6 for a new PCV valve,push and turn for removal.
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
It's my first jeep (my first own transport) and I've had it for 4 weeks so I don't know what any of it's history is like.
The coolant isn't low, I didn't know how to check it as it says it's pressurised, is it Ok to check it once it's fully cooled down?
From reading around it could just be that it needs to be topped up every now and again, I saw that it was low on oil when I bought it and it's done 1000 miles since then. Just the white smoke which is worrying, I might take a video and put it up.
I plan on topping up just with a bottle of Castrol from the nearest garage. 500ml at a time, leave it a few minutes and check the level again.
Popped some more oil in.
Can't get the PCV valve off, there are 2 metal pipes which it hits on, am I doing it wrongly? Pulled the pipe off and there was oil in there, just a trickle but is that normal?
Got a code to tell me my post catalytic converter O2 sensor has died. When ordering a new one does it matter which one I get? Surely they are all interchangeable?
Also, I'm having trouble finding one for a liberty (Cherokee in the Uk) but I can find out for a grand Cherokee (don't know what that is abroad). If its still for a 3.7 v6 is it interchangeable?