Under Dash Air Leak Question

[Jimma]

On my 68 Jeep Kaiser I have an under the dash air leak. There seems to be two places that air connections are made under my dash. One larger connection closer to the instrument cluster on the firewall area and one closer to the steering column. The one closer to the steering column has on the side facing the passanger a small hole that is blowing air. It appears from what I can feel and see from a distance. (its hard to get under there) a small hole where a screw might go in. I am not sure. I can hear and feel the air coming from this small round hole and can stop it with a finger but need to know how to stop the leak or to cap it. It is not a raised or male fitting but a hole and if it has threads in it they are female threds on the inside. Any help would be appreciated.

 

[Heavysteven]

Wiper air valve and air gauge maybe....

 

[RAYZER]

some of the leaks may be at the swiveled fittlngs,a little air tool oil in the joint works wonders.

 

[WOLFMAN1]

turn the truck off get some putty and wrap it around it for a temp fix. i would suggest liquid rubber if you can keep it out of the line. maybe shrink wrap for air lines. my only guesses good luck

 

[Seth_O]

I have a '67 Kaiser Jeep that had the exact same symptom. The issue was an air pressure regulator mounted on the firewall, fairly high up. The hole was small, obviously factory, and appeared to need a small screw or plug or something. It had electrical connections from it to the low pressure buzzer, and tubing to the air compressor and the air pressure gauge. When my air pressure built to 60psi+ it started to blow air.

I removed the regulator, disassembled it (was very simple: a large adjuster nut, a ceramic cone, a spring and a rubber valve) cleaned it up and lubed it and then reassembled. Upon reassembly I tighted the adjuster nut down further than it was when I bought it. The leak immediately stopped and the truck built pressure to 120psi without any problems. The regulator was doing exactly what it was designed to do, no idea though why it was adjusted to release at 60psi, it just needed to be set back to the correct pressure (adjusted by screwing the bottom nut further in.)

Perfect fix - easy, and cheap! FWIW I examined several other trucks of different ages (all 70+ I believe,) and none of them had the regulator.

 

[cessnatwin]

Go the home depot, lowes or hardware store grap some male fittings and some high pressure hose, usually it is red. Start with just replacing those lines. It is fast and easy, usually they rot out over the years, and this is a quick fix, double house clamp them is a good idea! Call me I can tell you the fitting sizes and even if that id]s not your total problem you will be glad you did it! It does not take long at all and it is a quick easy fix that I have done to every truck I have owned!

 

[CGarbee]

Work the problem...
Start at one fitting, check for leacks, and then move on to the next one.
Don't forget to check the air lines themselves (especially the flex line between the manifold on the firewall and the pressure guage in the instrument cluster--it blows and you have just enough time and air in the tanks to hit the brakes twice...).

 

[Jimma]

Seth O,
I think you figured out my problem. Everything else is tight and holding air perfect except that one little hole on the side of that regulator. I tried to compare it to my 71 deuce but the 71 did not have that regulator and the air system under the dash seemed to be much simpler in design. That regulator is a hard one to get to and I do not look forward to taking it removing it and then re installing it. Any suggestions as to how I can do it without tearing anything up or getting stuck?