AC Evap Drain Help

[CBari]

On my 03 the AC Drain has went to leaking back into the cab. I have cleaned the drain out on the fire wall and it runs out of it like it supposed to when parked. I still however am getting water inside the cab around the foam where the drain passes through the fire wall. What have others done, I know I can't be the only one.



I looked at the back post about people who have made turn down on theirs but I thought that they did that because the didn't like where the water dripped.

 

[B.G. Smith]

Try blowing a liitle high pressure air back through the drain. Might also need to check the refrigerant charge level, may be icing up a little inside the box causing deflection of the water from the drain. Next time you come into the driveway, open the hood while the engine is stil running and see if the returen ac line to the accumulator is frosted up? bg

 

[CBari]

I will check for the frost up, but I have blown the line and used a shop vac and completely evacuated all the water and dirt. I almost wonder if the drain has a crack right at the firewall.

 

[Got HO?]

The gasket (grommet) where the drain pipe goes through the firewall is probably coming apart. I solved my leak by clamping a rubber hose to the drain tube that angled down to the ground. No more leak into the footwell area.

 

[CBari]

Ok checked and nothing was freezing over, which I doubted was the case because this truck blows cold all the time equally from side to side.

Got HO did you just clamp a hose on the the rubber nub that sticks out of the engine side of the fire wall.

 

[Got HO?]

Ok checked and nothing was freezing over, which I doubted was the case because this truck blows cold all the time equally from side to side.

Got HO did you just clamp a hose on the the rubber nub that sticks out of the engine side of the fire wall.

Yep. I used one that had a right angle bend so that it drains away from the firewall.

 

[BDaugherty]

5/8 heater hose works great. hose clamp it over the a/c drain and route it down so that the condensate drips right on the ground and not onto the frame or brake lines or anything. a hose with a 90 degree bend is nice, but not a must. every a/c box i rebuild gets a drain hose just as a preventive.

 

[CBari]

So if I understand you correctly what is happening is that the gasket from the firewall is bad and while I am driving the water drips out the tube but the air blows it back down the outside of the tube and through the bad gasket and into the cab. If I extent the tube this will stop this from happening.

 

[CBari]

I was skeptical about adding the hose and it fixing my problem but it did.