PCV Help 1982 CJ7 - JeepForum.com
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post #1 of 29 Old 07-26-2011, 05:57 PM Thread Starter
sublimesurfer
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PCV Help 1982 CJ7

So I noticed oil on the hood and around the valve cover. The person I bought the jeep from had an odd set-up for the PCV and I think this is the reason I am getting an oil leak. On the valve cover, you have the pcv (90 degree elbow) with tubing going to the manifold I assume. In front on the valve cover, there is some sort of air filter. This set up doesn't seem right. In addition, the PCV pulled out with no effort, the tubing pulled out without effort, and the air filter would have came out if I sneezed on it. The PCV seems straight forward on the 1983+ CJ's but the 1982 has some sort of T-PCV valve, how does this get hooked up... Heeelp.

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post #2 of 29 Old 07-27-2011, 04:04 AM
twmattox
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IIRC, that PCV solenoid was recalled and removed. Rear valve cover hole goes to your air breather. Front valve cover hole goes to your carb (large vacuum) and has the PCV in it.
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post #3 of 29 Old 07-27-2011, 05:29 AM
waterdowg
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Here you go.
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post #4 of 29 Old 07-27-2011, 06:00 AM
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Pull the PVC intake hose from the rear of the air cleaner and attach a vacuum gauge to it. It should read 3-5" after the engine has run for a few seconds.

If not, then you have a leak in the system somewhere causing blow back. Is there oil in your air cleaner?

This link should help: http://home.sprynet.com/~dale02/vac-pcv.htm

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post #5 of 29 Old 07-27-2011, 07:57 AM Thread Starter
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Hey waterdowg, thanks for the diagram. The purged vapors in the front, where does that tube get connected? Is that tube left loose? My set up just seems slightly different. The carburetor only seems to have one hook up point for the vacuum system. If you don't mind providing more insight, I can email or post pictures, Thanks.
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post #6 of 29 Old 07-27-2011, 08:24 AM
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The purged vapors in the front and the purge valve signal go to the canister. Look at the Picture below.
Purged vapors in the front go to Ported Vac on the canister
Purge valve signal go to PCV on the canister
Carb goes back to the bowl vent on the carb
Gas Tank runs back to the Roll over valve I think
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post #7 of 29 Old 07-27-2011, 11:14 AM Thread Starter
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PCV help

Waterdowg, ahhh now I am starting to see the light. Ok so out of the charcoal canister, I run the tube as shown directly to the T-PCV, and I assume the other port on the T-shaped PCV goes to the manifold/carb? And then the remaining hole in the valve cover (back hole), do I use another PCV or do I plug in an air filter? Thank you so much, this is the first attempt at mechanic work, and I am at least happy that I diagnosed the problem.
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post #8 of 29 Old 07-27-2011, 11:16 AM Thread Starter
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I am at work right now and can't upload pictures, but if you send me an email, I have two pictures of my engine on my phone, that might help.
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post #9 of 29 Old 07-27-2011, 12:57 PM
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Yes thats seems right for the PCV T in the front. As for the back you have two options. You can install an after market Breather valve, or install an elbow attached to a small tube to a Breater vent in the Air filter like below. Look at the picture attached. You will see the Factary stuff in the read circle. This may also help.
http://www.jeepforum.com/forum/f8/84...27/index2.html
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post #10 of 29 Old 07-27-2011, 01:13 PM Thread Starter
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Awesome, thank you so much. I'll have to examine my air filter, I know there is a port for the PCV vacuum, but I don't see any other ports to place the tube from the rear elbow joint on the valve cover. I will figure that part out. Thank you again.
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post #11 of 29 Old 07-27-2011, 01:40 PM
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Hope it all helps. If you get the chance post some pictures so everyone can see whats going one. You will be amased what folks here will pick up from just one picture.
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post #12 of 29 Old 07-28-2011, 10:24 AM Thread Starter
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http://i1111.photobucket.com/albums/h478/sublimesurfer2011/setup.jpg[/IMG][/IMG]
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post #13 of 29 Old 07-28-2011, 10:25 AM Thread Starter
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post #14 of 29 Old 07-28-2011, 10:26 AM Thread Starter
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post #15 of 29 Old 07-28-2011, 10:30 AM Thread Starter
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Ok guys I am hopefully in the home stretch. Here is my dilemma. I have cleaned the valve cover, replaced the valve gasket and added silicon sealant. I now am left scratching my head. In the second picture about, you see what I believe to be a port going to the exhaust manifold. Right now there is a tube heading from the charcoal canister (2nd port) to this "exhaust manifold port". I am now left with one port remaining on the carb which I believe is the vacuum port. It was my understanding that I needed to run 2 tubes from my T-shaped PCV, one to the charcoal canister, and the other to the exhaust manifold. Should I A. Plug the rear valve cover with a simple filter as shown in picture 1, or B. Run an elbow, with that tube going to the vacuum?? Heeelp
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