If you're talking about the black plastic cover in the car, I just used RTV and filled the entire channel.Hey Guys,
I've changed out my heater core and im still getting leaks. I'm thinking i need to replace the seal on the drip pan. Is that a part or can i use just a sealant?
Could you elaborate on the shifted evaporator core a little?If memory serves me correct, the base/lower piece of the heater core/evaporator cover has like a U-Shape to it where it mates to the upper half having a straight piece.
I had to play with that fitment about a half dozen times, 'till I figured out the evaporator core was shifted and the condensation was falling directly on that seam.
Okay, the problem I had was easy to see as the condensation from the evaporator core was coming down right at the left hand side where the upper and lower halves meet.Could you elaborate on the shifted evaporator core a little?
I am banging my head against the wall trying to figure out my water leak problem. It's not the usual missing elbow issue. It's not coolant. It's not rain water. I resealed the evaporator/heater core housing. The water appears to drip off the bottom of the foam backing that surrounds the hole that the drain pipe goes through in the firewall.
Thanks for any tips.
Where the upper and lower halves of the plastic housing meet? I'm not picturing that very well as the housing has two compartments: the evaporator in the right compartment and the heater core in the left compartment, with an internal wall separating them. If the evaporator was displaced to the left, it would be over the seam on that internal wall. How did you see that it was leaking there?Okay, the problem I had was easy to see as the condensation from the evaporator core was coming down right at the left hand side where the upper and lower halves meet.
What I did was use some 1/8" pieces of rigid foam to move the core to the right hand side of the vehicle just a little bit so the edge of the core was was away from the seam.
Can you visibly see any of the condensation dripping from any areas? I used news paper to be able to help see where exactly the drips were coming from?
I think you may be right that the solution may lay in sealing the firewall side of the pan. I am not sure how well that will work as it's not really designed in such a way that it is easy to make that watertight. I have no idea why they designed it that way.If that is the case, you definitely have a leak at the tray. Exactly where is now the issue Check for cracks and holes Make sure you do not have a wire or hose trapped between the pan and the rest of the duct. There is a part of the pan that does not have a seal on it toward the rear (front of the car) above the drain tube. Perhaps you can put some silicone on that area. Make sure you have all of the screws in tight. Have you pulled the carpet back, and had someone ride along to check where the water is actually flowing from, or at least idle it, and watch with the carpet pulled back?
If the opening for drainage is even partially clogged it could back up the water until it flows out of the unsealed area above the drainage hole.
This is exactly why I have a piece of clear vinyl tubing going from the elbow, down below the frame.[SNIP]
I'd urge all b-body owners to check under their carpet and make sure it is not damp. The way the water leaked on my car, it went behind the carpet on the firewall and down to the floorboard with no evidence on the top of the carpet that there was a leak.
Yes it is a good feeling! I will be keeping the trim off the carpet edge for a while so I can check under the carpet for moisture, cause I'm not feeling totally trusting yet. I also had a tube running off my elbow and the leak never prevented water from also draining in the normal way. There was no tip off to the problem besides the vague, mild smell.This is exactly why I have a piece of clear vinyl tubing going from the elbow, down below the frame.
I will usually take a look at the ground when I park my car, and see a nice puddle and a good stream coming from the tubing.
Glad you got your problem resolved. It's a great sense of accomplishment when you're able to track down and fix those pesky ones.