Leak under passenger side dash

[RMFSK1500]

The thanks should go to @someotherguy for coming up with the fix. I just kept a copy in my truck file and post it when someone complains about the classic right passenger side leak.

Well thanks to him for finding it and thanks to you for keeping it up! I’m actually about to go out and look into it now !

 

[Eveready]

Well thanks to him for finding it and thanks to you for keeping it up! I’m actually about to go out and look into it now !

Good luck. Hope that fixes it . Let us know if you are successful and if not, what it does turn out to be .

 

[scott_williams2]

It didn’t completely fix it it just helped but anyways I watched the evaporator wit the ac on and it practically was pouring from the bottom onto the bottom of the box. Is that normal???? Drain isn’t clogged it leaks good. Regardless I’m not too worried about it Bc summer is pretty much over here I’ll worry about it next year...maybeeeeee

 

[east302]

No, I wouldn’t say that it’s normal. I’m in Jackson and only had water on the floor when the evaporator froze over. The case doesn’t sweat, either.

Is it leaking from a seam or just sweating all over the place? Is the little rubber elbow still installed on the drain at the firewall?

It probably wouldn’t hurt to have the pressures checked on the system. But, like you said, summer is finally over it seems.

 

[Garage Hack]

Good info here. Does anyone know the part number for that little elbow on the firewall? Mine is missing and I can't find it on a parts diagram.

 

[east302]

Here you go...

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[Garage Hack]

Here you go...

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You know what, you are awesome!

 

[HotWheelsBurban]

Yesss! If that little f' er isn't on there, it will pee on the floor! Learned about this with our first 99 Burb. Got to get a couple of those next time at the yard.

 

[Schurkey]

Yesss! If that little f' er isn't on there, it will pee on the floor! Learned about this with our first 99 Burb. Got to get a couple of those next time at the yard.

If it's PLUGGED, it'll flood the evaporator box. My Monte Carlo would mist out of the dash vents on left turns, when the water sloshed into the spinning blower fan. Corroded the heater blower resistor pack, too.

When I pulled the rubber drain off the firewall, I got what seemed like two quarts of water pouring out of that opening. Made a huge mess under the car. Had to blow a soggy mess of dead leaves out of the duckbill.

But if it's just missing, I don't know why the box would flood.

 

[HotWheelsBurban]

If it's PLUGGED, it'll flood the evaporator box. My Monte Carlo would mist out of the dash vents on left turns, when the water sloshed into the spinning blower fan. Corroded the heater blower resistor pack, too.

When I pulled the rubber drain off the firewall, I got what seemed like two quarts of water pouring out of that opening. Made a huge mess under the car. Had to blow a soggy mess of dead leaves out of the duckbill.

But if it's just missing, I don't know why the box would flood.

In theory, couldn't the drain elbow get plugged, and fall off or break? And if some of the plugging material was still in the drain hole/pipe, the evaporator box could still flood.....
Remember, I'm dealing with gulf coast humidity!