This weekend i replaced my vcg and painted the cover.all the groments and elbows broke when i removed them.i bought groments and elbows from help section in oreilys .put it back together and it idled fine until i put it in gear and it died.cranked it back up and it idles low.i wiggled vacum lines and lines coming off cover and it it cranked and idled fine.i think i have a vac line leak but my question is would the two lines coming off the cover (if leaking) cause a bad idle or did i break a vacum line somewhere else? Did i get the right parts from oreilys (help section)or should i go to dealership for pvc elbows? Rain has hindered my time working on it.it a 2000 4.0. Thanks

 

Is this the elbow you installed in the rear position (next to firewall) on the valve cover. It's the one you need.

http://www.oreillyauto.com/site/c/de...cv+valve+elbow

Note the fixed metering orifice in the fitting.

Edit: The front fitting must not have that fixed metering orifice in it.

 

it looks like it but not sure.I bought 2 one said Chrysler and the other said dodge jeep. Ill look when I get home . So the back one has a metering orfice? Is that another word for small hole. The back and the front are different ? Sorry this is all new to me .

 

This is what ive been reading CLOSED CRANKCASE VENTILATION SYSTEM 2.5L & 4.0L 1. Closed Crankcase Ventilation (CCV) system is used on both 2.5L and 4.0L engines. CCV system performs same function as a conventional PCV system, but does not use a vacuum controlled PCV valve. CCV system uses a fixed orifice fitting. Ensure locations of fixed orifice fitting and air inlet fitting have not been exchanged. 2. Fixed orifice fitting may be Gray in color and air inlet fitting may be Black in color. On 2.5L, fixed orifice fitting is located on left front side of valve cover and air inlet fitting is located at rear of valve cover. See Fig. 15 . On 4.0L, fixed orifice fitting is located at rear of valve cover and air inlet fitting is located at front of valve cover. See Fig. 16 . 3. On all models, remove fixed orifice fitting from valve cover and leave tube attached. Start engine and let idle. A hissing noise should be heard from fixed orifice fitting. Also, a strong vacuum should be felt with a finger placed at fitting inlet. If vacuum is not present, remove fitting. If vacuum is now present at tube, replace fitting. Do not attempt to clean fitting. If vacuum is not present at tube, go to next step. 4. Check tube for kinks or obstruction. Clean tube fitting at intake manifold, if necessary. A 1/4" drill may be used (by hand) to dislodge any solid particles. Reinstall fixed orifice fitting and tube. Disconnect air inlet fitting and hose from front of valve cover. 5. Hold a piece of stiff paper loosely over opening in valve cover. Allow engine to idle for one minute. Paper should be drawn against rubber grommet in valve cover by vacuum in crankcase. If vacuum is not present, check tubes for restrictions or obstructions. Fig. 15: Locating Closed Crankcase Ventilation Components (2.5L) Courtesy of DAIMLERCHRYSLER CORPORATION Fig. 16: Locating Closed Crankcase Ventilation Components (4.0L) Courtesy of DAIMLERCHRYSLER CORPORATION Page 1 of 1 SYSTEM & COMPONENT TESTING -2000 Jeep Cherokee Classic 3/15/2009




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These two fittings (front and rear) are part of the Jeep Crank Case Ventilation (CCV) system for the engine. This system replaces a Positive Crankcase Ventilation (PCV) system seen on most vehicles of your vintage.

The rear fitting connects to the intake manifold and is the vacuum source for drawing crankcase vapors out of the engine (via the valve cover) and into the combustion chamber to be burned. The metering orifice is a calibrated leak, so to speak, in the intake system.

The front fitting has no metering orifice and is the source of fresh air to enter the valve cover.

The rear (CCV) fitting should be gray and stand taller than the front, low profile, black fitting.

I'm too lazy to look up the front fitting on the O'reilly website for you right now. Maybe later. But for now see what you have and where you have it.

Cheers

 

This is it.

 

thanks a lot CCKen both elbows I replaced are grey. seems one is wrong when I get home im on it. .Just to clarify this would cause low idle or similar symptoms

 

It probaly would cause low idle because the fixed orifice in the inlet spot would limit the air being removed from the valve cover.

When you get home test the system by removing the front fitting (with the orifice) and start the engine, it should idle normally.

Put the proper fitting in the front and you should be okay.

 

Thanks again bud.

 

^this. Iirc the rear is also a little taller than the front besides the orifice difference.

 

Here's the front elbow fitting. Listed on Advance Auto Parts website.

http://shop.advanceautoparts.com/web...982%7CL3*15301

O'reiily should have these as well. For some reason these idiots refer to these fittings as PCV Valves.

 

You can walk into most Advance Auto's and find the grommets on a spinning rack at the back of the store. I've been to 3 different ones and they were all at the same spot.

 

That's what I did buy them off the help rack.I just didn't know there was a difference in the two. I destroyed both of them taking them out to paint the vcover. Looking at the advanced part im sure I need to take one back and get the front inlet elbow. Thanks guys for the quick responses I love this forum .

 

Ok went to advance today and had them pull that part number and it was the one with the orfice the pic is wrong.the right numbers are #47079 and #47057 on the help isle.

 

Glad that's fixed.

But I must ask, what are those unproteced wires laying about?