This is a step by step illustration of how to replace the PCV Valve on a 3 liter 1994 Nissan Pathfinder engine. Learn all about your Pathfinder at NPORA (Nis…
How to Replace PCV Valve on 1994 Nissan Pathfinder
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Very Nice video. I’ve built my own bumpers, done my own timing belt/water
pump job, swapped from auto to 5-speed tranny, replaced a couple of
clutches, installed crawler gears in the t-case, regeared and installed a
locker in the rear axle and I honestly never knew where that damn PCV valve
was located. I looked for it a couple of times, but never realized it was
screwed into the side of the intake man with a hose connected. I guess I
thought that was just a hose connector all this time. lol
This could allow gasoline into the engine cases. Gasoline has almost no
lubricating properties for high-pressure applications such as crank
bearings and cam followers.
i have the same Nissan. I would also like to replace them with thermostat
controlled electric radiator fans. can You say what fan , and who is
selling it. I looked all over the place and found possible options but I’m
not sure which might be the right one.
Nice rig! Thank you for making this video. I have a 95 model and have
noticed a strong smell of raw fuel out of the exhaust. I figure i start
here by changing the pcv valve, then move to the spark plugs, rotor and
cap, wires etc. Thanks again.
@anacortesjim sir how much it cost to replave a broken valve? nissan altima
1998 model
The extra room you mention is there because I removed the oem cooling fan
and shroud to replace them with thermostat controlled electric radiator
fans. It gives the engine a cleaner sound, cools better, increases mpg
slightly as well as adding a couple of horse power by reducing drag on the
engine. Another reason is that it keeps a manual fan from spraying water
all into the engine compartment if crossing a river, etc.
Hi sir! Isn’t teflon tape needed on the threads when installing? I remember
some mechanic told me that teflon sealing tape was needed. But some also
told be it doesn’t since the threads are already tight with each other,
just like what you showed us on the video.
@anacortesjim junks from the Zone
The PCV valve is a simple ball check valve. It is oriented so that vapor
flows from the cam/valve cover to the vacuum source, usually the intake
manifold or tract. It has two failure modes: Stuck open Stuck closed Stuck
open would allow normal flow of crankcase oil vapor to the vacuum source,
but would allow intake pressure pulses to flow back into the cam/valve
cover. Thi
Thanks for posting this. I’ve been trying to find my pcv all day!!!! Thank
you.
Read the last 3 post from bottom to top so they actually might make sense.
🙂 Hope this helps.
Thank you very much that was very helpful
Stuck closed causes a slight power loss. The PCV valve has one major
function and one minor side-benefit: it allows crankcase oil vapor to be
burned instead of venting to atmosphere and the vacuum applied to the
crankcase reduces crankcase pressure slightly. Pistons moving up-and-down
pump crankcase air as wells as intake air, using horsepower to do so.
Reducing the crankcase pressure reduces pumping losses.
I have a 95 – why is there a foot between the front of the engine and the
radiator? My 95 seems like its crammed in there w/ no real room like you
have…
Thanks TrailChaser, That was why I made the video. It took me several days
and lots of conversations with friends until I found mine too. 🙂 I decided
I would make a video to help the next poor sap like me who wanted to change
out their PCV valve. I appreciate your feedback. Thanks again, Jim
jayr1222001 – they are not expensive at all. For your car, I think Autozone
stocks them at $2.49.