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Cobra99 Member
Joined: Sep 07, 2015 Posts: 6
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BullRun Member
Joined: Mar 10, 2009 Posts: 459
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Posted: Thu Sep 10, 2015 7:59 pm Post subject: |
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PCV valves are readily available for a few dollars brand new.
Simply undo and replace.
Located on the lower left side of the block looking forward. |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16250 Location: Wisconsin
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Posted: Thu Sep 10, 2015 9:28 pm Post subject: |
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Didn't I give you a link to Binky's CJ5 PCV page?
Here is another good page for the civvy PCV system on the F134. It's the CJ3B page:
http://cj3b.info/Tech.html
http://www.cj3a.info/tech/pcv.html
You will need to remove the two tube nuts on each side of the "T" fitting first. Then you can thread the valve itself out of the plumbing. Make sure flow arrow is pointing in the right direction. With the valve in your hand it should rattle when you shake it. If it doesn't then it obviously is gummed up. One hex end of the valve will unscrew. Document the order of parts removal. Photos are always a good idea. Then just clean it and reassemble. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
Last edited by wesk on Thu Sep 10, 2015 11:30 pm; edited 1 time in total |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16250 Location: Wisconsin
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Cobra99 Member
Joined: Sep 07, 2015 Posts: 6
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Posted: Fri Sep 11, 2015 4:43 am Post subject: |
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4x4M38 wrote: | Yep, that's the pvc valve right under the manifold in your
first photo.
Are you sure the oil is coming from the air cleaner?
Check to see if you have a vent line from the oil fill tube
to the crossover pipe.
If you have a pressurized crankcase that's where the oil
will most likely come from.
Pull that PCV valve disassemble and clean.
Brian |
Brian,
It had been running fine for some time until it just got hard to start and when I pulled the hose from the air cleaner to the carb, they were both full of oil. I'm not much of a mechanic, but a buddy of mine said it looked like an issue we'd see if a PCV was clogged or not working. But he had never worked on any older jeeps, just muscle cars. So, before I tore it out and broke something I wanted to ask the guys who would know. I started with so called Jeep experts, who either didn't take the time to listen to the problem or just don't know. I asked them directly if there was a PCV on the 55 Willy's and they said "NO". After doing more research and reading the sites Wes sent me when I joined, I knew there was a PCV valve and should be a simple fix. But I wanted to share and make sure before I messed it up.
It looks like it will be a simple item to uninstall and clean/repair.
I'll let you all know how it goes. |
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Cobra99 Member
Joined: Sep 07, 2015 Posts: 6
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Posted: Fri Sep 11, 2015 4:47 am Post subject: |
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wesk wrote: |
Didn't I give you a link to Binky's CJ5 PCV page?
Here is another good page for the civvy PCV system on the F134. It's the CJ3B page:
http://cj3b.info/Tech.html
http://www.cj3a.info/tech/pcv.html
You will need to remove the two tube nuts on each side of the "T" fitting first. Then you can thread the valve itself out of the plumbing. Make sure flow arrow is pointing in the right direction. With the valve in your hand it should rattle when you shake it. If it doesn't then it obviously is gummed up. One hex end of the valve will unscrew. Document the order of parts removal. Photos are always a good idea. Then just clean it and reassemble. |
Wes, this is exactly what I needed. Thank you! Yes, you had sent me the links, which were helpful. But I didn't want to mess it up, so I wanted to be absolutely sure. This forum is awesome with the amount of information available. I really appreciate you annotating the photo, that is very helpful. I'm not much of an engine mechanic, so keeping it simple helps.
I'll let you know how it goes.
Thanks,
Pat |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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Posted: Fri Sep 11, 2015 5:29 am Post subject: |
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If I remember my research correctly Willys was one of or the first
automakers to install emission control equipment on their
vehicles. The PCV valve was part of that installation.
It was not designed, as was mentioned earlier, as such, but
as a way to pressurize the crankcase while fording in high
water on military vehicles. This led to two things. The replacement
of the draft tube with this system on all vehicles, as well as
the deep water fording kits on the CJ3V and M38 and later
vehicles.
To enable driving in high water Willys Motors essentially started
emission control on automobile and truck engines.
Wes, if I've misstated feel free to correct. _________________ Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16250 Location: Wisconsin
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Posted: Fri Sep 11, 2015 11:11 am Post subject: |
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Note the date on the service bulletin. Delmar Roos filed for the Willys MB PCV valve patent in 1943. By the end of the 40's several manufacturers were using them. The mandatory requirements show up in 1961 in Cal. and 1962 over the rest of the US. Although designed to solve sealing of internal combustion engines for underwater operation during WWII, they were offered as an option on many brands of vehicles from 1945 through 1961/62.
Some folks confuse the early PCV systems with emission control systems. The primary purpose of the PCV valve is as stated above but eventually it became part of vehicle emission control systems starting in 1961.
For this reason your jeep gurus who said nay to your question may have been thinking smog or emission control systems of the 60's and up. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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Cobra99 Member
Joined: Sep 07, 2015 Posts: 6
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wesk Site Administrator
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Cobra99 Member
Joined: Sep 07, 2015 Posts: 6
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Posted: Sat Sep 19, 2015 8:21 pm Post subject: |
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wesk wrote: | You are not looking at your own photo close enough!
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Thank you! I figured it out after I posted this, but didn't get back to update. It was pretty black and gummed up inside. Got it cleaned up and reinstalled but now I can't get it to start. I have the battery charger on it right now. Had it fire up for a little while, but couldn't keep it running. |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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