FlopTop04

A little DIY procedure on the PCV valve replacement.
Not sure if this part is even on the regular maintenance schedule for our 4th GEN RX350's but being old school, I like to replace the PCV valve around 60,000 miles.
The part is available from Lexus or many aftermarket sources. The official Lexus part number for my Japan built 2018 RX350 is 12204-31150 and lists for $9.42.
I used a BeckArnley part number 045-0439.

First release and open the hood. The engine is now exposed.



Remove the engine cover by lifting it straight up. There are 4 rubber gromets on the underside of the cover that engage four metal pins on the engine. Set the cover safely aside.

The PCV Valve is now accessible for replacement.



Squeeze the PCV vacuum hose clamp and pull the hose back and off the PCV valve. Position the hose to the side.



You can use a 22mm deep socket and wrench or a box / open end 22mm wrench to unscrew the PCV valve from the valve cover mounting hole.



Below is a photo of the old PCV Valve.



Install the new PCV Valve. I couldn't find a torque spec but snug with no gap between the valve cover hole and the PCV valve will work fine. Re-attach the vacuum hose, position and snap the engine cover
back in place and you're all done.

jcg0324

There is no mention of the PCV valve anywhere in the RX 350 owners manual that I have. Put a new one in when you do your spark plugs, 'IMO', or at least every 100,000 miles. Cheap insurance.

IntrinoX

iTrader: (1)

Oh, it’s this easy? On the GS, it was so hard to access the PCV valve!
many thanks!

Quantum501

Per TIS:
Torque Spec is 5.0 N.M. Lube o ring with oil.:

FlopTop04

Great info, Thanks.
For those without a NM Torque wrench, it's 44 LB-IN

LWechsler

How do you know that there is not a second PCV valve connected to the intake manifold !?

ravenuer

I'm not aware of more than one per vehicle.