Next time you are doing some basic maintence, just throw one in. By service records, mine was changed around 60k and 5 years ago. It went bad this weekend, and really made things tough. Low power, misfires and a huge smoke screen above 2000RPM or under load. Asked the question here without any real assistance, so for those searching later hopefully this will help. If you all of a sudden have smoke, reduced power and misfire codes (mine were 2,4,6,8 cylinders) first place to look is the PCV. I fully recommend just changing it out ahead of time.

 

Is this the correct part?

2008 LAND ROVER LR3 4.4L V8 PCV Valve | RockAuto

 

So...is the PCV valve part of any LR3 scheduled maintenance? If so, which one?

 

not part of any maintenance schedule I ever saw but I had a tech point out the PCV to me and told me it was a good idea to change it (I was at 74k).

 

Where does it live?

 

round disc looking thing under the air intake housing (the section between the MAF and throttle body). You should be able to spot it sticking out, it sits right below.

 

Thanks

 

Correct for the V8 engine. I believe it's part of the MAP sensor for the V6 and looks completely different. Regardless, it's never something that's part of any maintenance schedule, but always a good idea to do on every make/model of car. I typically try to replace mine at least every 75,000 miles... more often if they are particularly prone to failure or cause huge problems in the event of failure (e.g. with the 2003-2005 Range Rover).

 

That looks like the same one.

 

Also, as a note, my MPG has improved as well after changing. I would assume if yours is still functioning normally it might not. Now when the valve goes bad, you will burn more oil than fuel, but I assume there was some type of decline of the valve. A trip from NJ to VT and back a few weeks prior yielded 16.5 MPG. My same trip after the new valve this past weekend was 18.2. 400 miles on the tank. I also ran a can of seafoam through the tank to help try and clean out some of what burning oil gunked up, but still, fairly good gains. I was getting those MPG's last year, and recently saw the dip.