Water leak in HVAC box
#18
Senior Member
Join Date: Dec 2008
Location: Leeds, Maine
Posts: 532
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Year: 1999
Model: Cherokee
Engine: 4.0
I know most of these threads are old, but I also know that some of us have not found the source even with all the suggestions.
Mine has been leaking on both sides for a long time and I've chased it for so long I now need to replace the floorpans as you can see here.
The water has consistently come in this hole in the inner rocker panel near the seat bracket on both sides which lead me to believe the water was traveling down the A pillar.
But I couldn't figure out how the water was getting in until last night. There are two drain holes on each side under the cowl. One towards the front and another smaller hole (3/8" or so) closer to the windshield, over near the hood hinge. The front one is more of a rectangular hole that drains down through the fender. The small round hole drains down through the A pillar.
This picture is looking under the cowl with the wiper transmission removed. To the left is the lower edge of the windshield. I've plugged this and have no water leaks on the DS.
The hard part is on the passenger side because the inlet for the heater/AC is in the way, but I think I can get at it with a tube on the caulking gun. Maybe.
I wish the pictures were better, but it's not an easy spot to get at. HTH.
Mine has been leaking on both sides for a long time and I've chased it for so long I now need to replace the floorpans as you can see here.
The water has consistently come in this hole in the inner rocker panel near the seat bracket on both sides which lead me to believe the water was traveling down the A pillar.
But I couldn't figure out how the water was getting in until last night. There are two drain holes on each side under the cowl. One towards the front and another smaller hole (3/8" or so) closer to the windshield, over near the hood hinge. The front one is more of a rectangular hole that drains down through the fender. The small round hole drains down through the A pillar.
This picture is looking under the cowl with the wiper transmission removed. To the left is the lower edge of the windshield. I've plugged this and have no water leaks on the DS.
The hard part is on the passenger side because the inlet for the heater/AC is in the way, but I think I can get at it with a tube on the caulking gun. Maybe.
I wish the pictures were better, but it's not an easy spot to get at. HTH.
#19
Banned
Join Date: Oct 2016
Posts: 1,553
Likes: 0
Received 4 Likes
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4 Posts
Year: 2000 and 1998
Model: Cherokee
Engine: 4.0
I know most of these threads are old, but I also know that some of us have not found the source even with all the suggestions.
Mine has been leaking on both sides for a long time and I've chased it for so long I now need to replace the floorpans as you can see here.
The water has consistently come in this hole in the inner rocker panel near the seat bracket on both sides which lead me to believe the water was traveling down the A pillar.
But I couldn't figure out how the water was getting in until last night. There are two drain holes on each side under the cowl. One towards the front and another smaller hole (3/8" or so) closer to the windshield, over near the hood hinge. The front one is more of a rectangular hole that drains down through the fender. The small round hole drains down through the A pillar.
This picture is looking under the cowl with the wiper transmission removed. To the left is the lower edge of the windshield. I've plugged this and have no water leaks on the DS.
The hard part is on the passenger side because the inlet for the heater/AC is in the way, but I think I can get at it with a tube on the caulking gun. Maybe.
I wish the pictures were better, but it's not an easy spot to get at. HTH.
Mine has been leaking on both sides for a long time and I've chased it for so long I now need to replace the floorpans as you can see here.
The water has consistently come in this hole in the inner rocker panel near the seat bracket on both sides which lead me to believe the water was traveling down the A pillar.
But I couldn't figure out how the water was getting in until last night. There are two drain holes on each side under the cowl. One towards the front and another smaller hole (3/8" or so) closer to the windshield, over near the hood hinge. The front one is more of a rectangular hole that drains down through the fender. The small round hole drains down through the A pillar.
This picture is looking under the cowl with the wiper transmission removed. To the left is the lower edge of the windshield. I've plugged this and have no water leaks on the DS.
The hard part is on the passenger side because the inlet for the heater/AC is in the way, but I think I can get at it with a tube on the caulking gun. Maybe.
I wish the pictures were better, but it's not an easy spot to get at. HTH.
i drilled 4 small holesw above the lip in the engine room so it could drain in there. no harm,its oily!
#21
Banned
Join Date: Oct 2016
Posts: 1,553
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Year: 2000 and 1998
Model: Cherokee
Engine: 4.0
its the fresh air intake hidden under the cowling on pass side,an oval appx 3x6 inches.how did you get in there? you can barely see it from the wiper motor area with the cover off.
#23
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Join Date: Oct 2016
Posts: 1,553
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Year: 2000 and 1998
Model: Cherokee
Engine: 4.0
ok, i did that under hood by the hinge. theres a couple drains in the cowl cover . one drips into the air intake!. hole by the front screw.i could see water drip there,added a metal though to divert it away, tricke.
i check after an all day deluge,not a drop.
i check after an all day deluge,not a drop.