PCV/Vacuum

[JKWillys]

Hey Guys, I work at Kaiser Willys. My name is Jason. I am fully restoring a CJ3B for Mike the owner. I am trying to get correct the parts/orientation for the PCV cup and the plumbing to the Tee bracket. Would anybody have some photos of their PCV system and then from the Tee bracket the routing of the steel lines that go to the head on the passenger side and the fuel pump vacuum port? Thanks guys

[Rus Curtis]

Jason,
When I got my jeep, a lot of parts had been swapped out with a Previous Owner's "homemade" replacement.  I had nothing to reference to put it back like it should be.  That also included the brake lines (bought a set from a vendor and didn't know the lines were bent wrong until after I got them).

Lawrence Wade has owned his 1955 3B since inheriting it from his dad - who bought it new.  Since he was close by for me, I've visited him multiple times and took a lot of photos of areas I needed help with - to see what my jeep should look like.

Here's where Derek Redmond posted them to share:

https://cj3b.info/Owners/WadeDetails.html

There may be some minor differences from early to late 3Bs but Lawrence's jeep was a '55 and mine a '54.  I figured they were close enough.  What I've found out over the years were details within the images that helped explain other things (in the background and not what I was taking a picture of), which also helped.  Specifically, the PCV system was missing but there's no image that shows the left, front and right side of the engine to help with the routing - all in one location so I tried my best to capture this.  It's much harder to see some details with the jeep fully assembled as it hides certain details.  I went back and looked at my thread on Tapatalk and didn't see a lot of detail on routing the PVC.  We moved over here to the 3A Forum (became one big happy family!) and I haven't continued my build as things got in the way.

Anyhow, I found some images I took of my engine before the fenders/radiator so it's easier to see.  Keep in mind, I'm hand bending these lines by hand and the only "pattern" I had available was Wade's images.  So, with a lot of choice words and re-bending and re-fitting I finally got them installed.  Not perfect but close.  I had to tweak the lines with a screwdriver to separate them so they wouldn't rub against each other. 

[JKWillys]

That is a huge help! We have a guy here that makes our vacuum lines and brake lines. I am going to see if i can alter the sample he gave us to mimic that. On the line that goes near the bottom water pump hole, is it going over top the bolt head or just under the bolt head. Its held in with a clamp at that bolt correct? 

[Rus Curtis]

The fuel and vacuum run together.  The fuel line is clamped to the bolt (another one on the right side as the lines go vertical) just below the bolt (the clamp dimensions and mounting hole offset from where the line passes through keeps the line from sitting right on top of the bolt - not to mention that if it did, you couldn't get a socket on the bolt! The vacuum line is attached to the fuel lines using "S" clips.  At that location, since above the fuel line, the vacuum line appears to be right over the bolt.  If I recall, I bent the fuel line first to get it as close as possible (with clamps).  I then bent the vacuum to match.  Each fitting required a slight un-bending to get them around the block and then re-bent back into shape to test.  NOTE: if you do all this before attaching oil filter cannister/oil filler tube and other attachments, it may be easier.

I used the "T" fitting coming off the PCV valve as the anchor to start from and worked around to the manifold.

If you look real close, you can see some deviation (I'm bending these without a template - by hand).  I had to use a screwdriver to pry and ensure the lines weren't rubbing against edges.

[JKWillys]

Thanks Rus! I was able to get it routed properly after mocking it up some.

[derekredmond]

You've probably also seen the page at https://CJ3B.info/Tech/PCV.html which includes some of Rus's photos.  But for anyone who is doing this without being familiar with the basics of crankcase ventilation, it may be useful.

Derek