Under Dash Air Leak

[tbar123]

I have a air leak deep under the dash of my 84' m923 and the best way to find the leak is to pull the instrument cluster. So is there any words of advice before I embark on this journey? I tried to twist and turn my large body to find the leak but that's not happening, So this is going to be the best way to hopefully find it. Since all the rest of the air leaks are from the wiper system.I imagine that this is also the obscure leak, but won't know for sure until I get a good ear in there!!! Thanks for the words of wisdom. One another note; Has anyone found any mushrooms yet? Plan on going out Friday and Saturday!!!!

 

[porkysplace]

Posting a thread title relevant to the problem would be a good thing to know, for future searchs.

 

[goldneagle]

Try playing with the wiper control knobs and listen for difference in the sound of the leak. Mine was from the wiper control. Replaced the leaking control switch and no more leak.

 

[tbar123]

Goldeneagle; I did take a piece of hose, one end to the ear and the other fishing for hissing sounds and ran that around both ends of the wiper control valves ( the best I could) and didn't come up with anything.
Porkysplace; I made look at least....LOL I will do better in the future, I would edit the title, but I don't think that I can!

 

[plode]

Mine leak too. Looking for a solution other then replacing with the same type of valve. I will never again pull the instrument cluster out. A royal PITA.

 

[tbar123]

Thanks for the heads up plode; For the wiper motor themselves, I was thinking about small ball valves to shut them down manually when not in use, but I really need to fix that leak under the dash. I suppose I won't be looking forward to this!

 

[Recovry4x4]

Changed the title so the next guy with a problem and the motivation to search can find it.

 

[tbar123]

Thanks Recovery.

 

[plode]

This is exactly what I wanted to do, but finding ball valves small enough for the air lines will be a challenge. Likely will have to use a bigger valve with reducers in both ends.

 

[goldneagle]

This is exactly what I wanted to do, but finding ball valves small enough for the air lines will be a challenge. Likely will have to use a bigger valve with reducers in both ends.

They make 1/4" ball valves. I used them for my RO water system. I think I got them at Lowes.

 

[SsgtFoster]

My 923 had the wiper leaks that have been mentioned and the aux/trailer air valve leaks from time to time. Might be worth a look. I do agree that the cluster pull is a PITA. Good luck.

 

[srodocker]

Im also having one of these problems and i'm almost certain its the control knob. You said a 1/4 ball valve will work?

 

[doghead]

What about the park feature?

 

[srodocker]

Still leaks when its on that feature.

 

[goldneagle]

What about the park feature?

I agree that you will lose the park feature (which I really like) if you replace it with a ball valve. I wonder if the original control switches can be rebuilt? It might be dry o-rings.

 

[goldneagle]

Still leaks when its on that feature.

He means if you replace the original switch with a ball valve.

 

[doghead]

Has anyone looked it up in the parts tm and looked for the nsn?

Perhaps they are readily available or rebuildable.

 

[doghead]

Sure enough...

GK-9 wiper control

http://www.google.com/url?sa=t&rct=...NOO-XD1yzu8cFLb72h_WFow&bvm=bv.65177938,d.cWc

 

[goldneagle]

Sure enough...

GK-9 wiper control

http://www.google.com/url?sa=t&rct=...NOO-XD1yzu8cFLb72h_WFow&bvm=bv.65177938,d.cWc

I did not see any GK-9 is it a GK-1 ?

 

[doghead]

The TM lists GK-9.