Yeah, that would be a very unique coincidence. Since they obviously worked well, when new, could it be time has created some contact issues? I'm thinking, if I remember correctly, the mechanism is basically riveted together. Left to set, over time, it is possible the thing really only needs a bit of lube, at the rivet points and some full cycle use to get it to close properly.

 

The cowl vent on my wife's '54 was rusted shut at the hinges.
Took a lot of oil and moving to get the hinges to break free so it would open and close.

Could be one of the hinges is not moving freely.

 

It was flat once. So what caused it to twist? Maybe someone tried to force it shut with something stuck in there. So do the reverse and using small shims on the passenger side, close it until it is level. Remove the shims and try it. If it is still uneven, repeat the process with thicker shims until it is level again.

Later!
Mr. Ed

 

Another good idea. Certainly worth a try. Thanks.

 

I had to elongate the holes on mine. I suspect it was tweaked by a PO when they put the seal in upside down or stripped the cab for paint.

 

Dan, I had the same problem, drivers side too high. If you arte only interested in how it looks fully open or fully closed, you can adjust by loosening the lock nut on the handle linkage and moving the vent handle towards "open" then retighten the nut, it will apply more closing pressure to the vent and pull the higher side down. Worked on mine!
Olguy
Tony

 

Thanks for the tip. I'll give it a try in the spring. Unfortunately, it's too cold in my garage to work out there now so the trucks been put away until then.