Mystery Fittings on 71 CJ5 Dauntless V6

Could someone please identify what A and B are in the photo (this assumes I've figured out how to insert a photo...)? The photo shows the rear section of the Dauntless V6 engine in a 71 CJ5, right behind the carburetor. My only reference manual (Jeep Universal Series Service Manual) just doesn't do it for me.

 

(A) is a vacuum port. (B) is probably the port for the PCV valve. Although it looks a bit large. Kinda hard to tell the size from the pic. If it doesn't have coolant coming out of it, it going to be the PCV connection.

 

yes, B is for the PCV valve connection

 

A: would be where I would install my vacuum gauge. Or run the line for the over the windshield vacuum operated wiper motors.
B: would be where the booster for the brakes is hooked up.
That open line just to the left of A: would be C: the line for the PCV connection.

At least that is what I would use them for.jeep toss

 

Thanks guys, you're a huge help.

A. Could this be a vacuum port for the disconnected heater? The back of the heater control has 3 small-diameter vacuum lines, two go to valves on the heater/defroster body and one is disconnected with a long vacuum hose tied up behind the dash but looks like it used to come through the firewall.

B. I'll have to do a little more research on the brake booster pump because I'm not really sure what that is or if I should have one....

C. Here's another pic. The thin little line that has masking tape around one end was connected to the air filter housing...I assumed emissions related. The fatter hose to the left, coming out of the valve cover, is what I thought would connect to the PCV (assuming it had one) as shown in figure C-6, page 22 of the Service Manual???

 

A is the connection for the heate vacuum controls

 

I just found this info in an old thread:

"The PCV system circulates filtered clean air through the crankcase. The crankcase vapors flow into the manifold, where they are burned with the fuel.

There are two connections via hoses:
1) There is a filtered air inlet to the crankcase, typically into the valve cover. Most often this filtered air comes from the air cleaner.
2) The PCV valve also connects to the crankcase, again usually via the valve cover, and then connects to manifold vacuum. This vacuum connection can either be at the base of the carburetor, or directly into the manifold. If to the manifold, there will be a grommet in the manifold where the PCV valve plugs in, and a hose to the valve cover. If to the carb base, the PCV valve plugs into a grommet on the valve cover and a hose goes to the base of the carburetor.

hth!"

So does this mean that the larger hose coming from the valve cover should attach to the "B" port which looks like the PCV that has been put in using a liquid gasket material? Why isn't the PCV located at the Valve cover end as shown in the service manual?

 

Stock A is for the heater vacuum controls as noted.
B is for the pcv. The pcv valve should be in the passenger side valve cover with a hose going to fitting on the manifold.
Being Early Cj's didn't come with brake power boosters or vacuum gauges there was no factory connections for these.
The connections shown can be used for these but that is not the intended use.
I would say the PCV system is more important to keep crankcase pressures from being too high and causing oil leaks.

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X2 what nickmil sez.

 

FWIW here is a side shot of my 71. A does go to the heater control and the one with tape goes to the air filter housing. Some of my smog stuff was gone when I got it. There is a piece of heater hose with a plug in it that probably went to a very important device.

 

Mark beat me to it. But I took the photo anyway, so here it is. My 71 had the smog control stuff from the factory, that is the extra connection on mine behind where the pcv valve hooks to the carb base, but it is the same plumbing as yours.

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I just realized you (Kevin) and Mark (ojgrsoi) are both in the DFW area with 71's. Heck the jeeps could have come off the same dealers lot. Interesting.

 

That must be an OK fix on the smog hose. Mine (sold btw) had the same plug and clamps, came from OK, came to TX and went back to OK.

 

Even better, the bolt that is clamped in the hose as a plug fell out of an MG with Texas plates on the road in front of my dads house about 1976. spooky.

I remember that to this day but I can't remember my wedding anniversary to save myself.

 

Y'all are great, I really appreciate your time, knowledge and pix.

Mark, I'm bummed you sold the 71 'cause I'd love to have gotten together just to look at a few things and compare notes.

Grant, thanks again for your help. On another thread you asked about my manufacture date and on my little sticker it's too worn away to read it. I found information about how to use the VIN to determine the mfg date. Based on that, it seems mine's in the June/July 1971 timeframe.

I've replaced the PCV (O'Reilly's) and PCV gasket in the top of the valve cover and run the hose over to the port on the back of the carb. All's good. Also, I'm hooking the "A" port up to the heater control valve so hopefully I'm one step closer to getting the heater working before plowing duty starts back up. I still need to figure out where exactly the heater hoses connect because right now I have none and no obvious places to connect any.

 

One heater hose connects to the water pump, the other one the passenger side of the intake manifold near the front.

 

colojeepguy, anyway you could shoot some pix? Only port I can see on my water pump has the by-pass hose connection over to the thermostat. And on the passenger-side of the intake manifold all I can see is a plug covered in 40 years of grundge so would like to know I'm looking at the right thing before I try to unseal it.

 

My Jeep isn't living at my house at the moment, due to my impending divorce (long story )
But if you go back to the picture in post #5, it appears that the reddish colored hose by the alternator has been used to bypass the heater by going from one heater hose fitting to the other.

 

What Doug said. here it is hooked up. the hose from the pump goes to the rear connection on the heat exchanger (on mine anyway)

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Do I have this right as shown on your engine?