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It doesn't have a valve per se but, it does have an oil separator that can clog. Its in passenger side valve cover and should pull out with needle nose pliers for a good cleaning.( thats what people say I could not get mine out any way I tried) Try unhooking the hose that goes from this valve cover to the intake, from the intake side try to blow through the hose and if you cannot the oil separator may be clogged.
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'03 HSE7 112k driveshaft/headgasket/water pump/oil pump/all fluids akebone pads and new rotors and I have almost had it a year
'02 pathfinder 160k
'89 yota 4x4 251k
If you can't pull it out you can squirt some carb cleaner down thru it.
Thats what I did and I was able to blow air through it somewhat easily, it is quite a small hole.
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'03 HSE7 112k driveshaft/headgasket/water pump/oil pump/all fluids akebone pads and new rotors and I have almost had it a year
'02 pathfinder 160k
'89 yota 4x4 251k
see attached page from RAVE emmissions. Item 10 is where the separator is. That side is vacuum to the plenum, without the separator, oil splatter may be drawn into the plenum. The big problem comes when both of these hoses are closed with gunk, a slight pressure builds where things are not built for it, and gaskets and seals can leak. Should clean out separator and both those hoses (left and right).
If you don't have a separator, seems like you will be making more oil get burned in engine.
if you have no oil seperator you can suck oil into the throttle body
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00 Disco 4.0 80k miles SLS, ACE, 7 passenger 255x65x18: Repairs since 02/11 new intake, valve cover, head, timing cover, waterpump & oil sump gaskets, new timing chain & gears, water pump, t-stat, hoses, belt, new front drive shaft, Akebono pads, D&S rotors, SS brake lines, clutch fan, HMS completed.
90 RRC County
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He who dies with the most toys, WINS
If you still have a pressure issue after cleaning the oil separator then you might have a bad ring and a compression test, possibly a leak down test would be warranted.
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Mike
Retired service manager. Member of the Solihull Society, NCLR club, SCLR and Santa Barbara 4 Wheelers.
99 D2, 3" lift, CDL with a Detroit and T.T. lockers, H.D. axles, 4:11 gears, Custom front and rear bumpers, sliders, Warn winch, and 5 HID's.
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Pressure in crank case during oil change? PCV?
