water leak into cab
 

has anyone had a water leak that keeps the drivers side floorboard wet ? I haven't been able to find it, and really don't want to tear the interior apart to locate it if someone here has an idea where it's coming from.

I also noticed a 95 recently had the same issue.

headliner shows no signs of water, windshield doesn't seem to be leaking, door seals are good and don't leak that I can tell......taillight seal was erplaced < 1 yr ago, and has a very good rtv seal if ya know what I mean.

is there anything on the cowl that can leak like this ????
it is water, not antifreeze btw.

I had the same problem. The water was coming in through the rear window seal. It would flow down the seam and soak the carpet on the drivers side. Had to remove the cap and had the glass guys replace the seal, and you know they had to break the glass. Remove the rear seat and have someone spray the edges you'll find your leak. I hope your having warmer temps then we are, 5 degrees this morning.

I had the plugs/caps that hold the plastic cowl cover on .would happen when driven in rain or when washing truck.washers/seals under caps go bad overtime.hope this helps.

I had a water begin pooling on the driver's floor after having the windshield replaced. I initially thought it was the windshield seal, but I eventually found that when the sun visor that the previous had installed was removed to R&R the windshield, it began to leak where it was screwed onto the roof. I fabbed up some rubber gaskets for it and sealed the bejesus out of the screws with RVT and the leak disappeared. The headliner never showed any signs of an overhead leak, either.

if I were a bettin man, I'd say your problems are from the rear cab lite. I replaced my seal and it still didnt seal the lite. I used clear caulk to fix the problem or so I thought. I also found that my door seals had pulled away from the upper corners and that allowed water to low down behind the seal and into the floor. The head liner never got wet and my carpet would be SOAKED.

The easiest way to find the rear cab lite is to remove the rear seat and have someone hose down the cab lite. you'll see water run down both sides of the cab. once the seat is removed you'll see why the water runs where it goes.
Also pull the drivers threshold panel and wet the roof around the door seals. if they have pulled from the corners you'll see water flow down behind the seal and into the floor. to "fix" the seal, pull it off and squeeze the lips together and apply 3m weather strip adhesive behind it before you install it

worked for me
lewis

My '96 ext cab
 

sometimes gets water on the drivers side right next to the plastic doorsill. I beleive the only time it leaks is when I take it through a certain kind of automatic car wash with lots of side blasting. I do not know for sure where it is leaking in, but I suspect it is around the bottom of the door. I just avoid those car washes.

i had the same problem, pulled the cowl, cleaned the leaves and stuff out from the drain holes and put clear sealent on the sheetmetal seam that runs aross from door to door.

Im willing to bet you have rust holes in the pan thats letting water in. Theres a lot of places it hides, but its often underneath those asphalt patches, so they have to get ground or scraped off to see the holes.
Keep an eye on the forward cab mounts.. blow them out with compressed air and try not to let the gunk sit in there for long it traps moisture.
Also watch the seams that go across the backs of the seats, that will allow water to hide up there and put a hole under the seats.
If you find holes, Id saw a square out and trim some galvanized sheet metal to fit and tack it in with a small MIG or something. Suppose you could braze it too. Has to be spot or stitch welded unless you like making weird shapes out of the floor panels.
POR-15 works really well, even just spraying metal-ready (or any phosphoric acid / zinc treatment) into inaccessible places to kill the rust is a good idea.
Id also treat the fender arches via the holes for the turn signal fixtures and the insides of the doors and rocker panels.

I to thoguth it was the windshield. the pass side leak was, but the drivers side was the door seal. had it fixed (door was tweaked). Now, it no leaky. but I think it may be under the cowl, or may be the back glass seal.

if it's the back glass, that's a good time to put in the power sliding rear window I have been wanting anyway. A sliding rear window is useless in a extended cab truck. So are the side windows, as you can't really open them from the drivers seat.

I'll have to check the other places once I can get it in the garage.

I'll let yall know if I find something.

Check the third brake light seal...

on the passenger side it is the AC drain that is the culprit... If neither of those are it, and it happens only after a hard rain or car wash, well, ur door seals are bad..

Rick

What I usually do to find cab leaks is tape the exhaust vents at the lower rear door frames shut. Windows closed, fan on high, vent mode, spray soapy water over the cab. Cab is now pressurized with no place for air to go except out the leaks, bubbles will lead you to the leak.

Something I noticed just last week on an Explorer that had an irritating air leak. With the fan on high in the car wash bubbles formed on the leak during the soap cycle. Perhaps the method I described above is more complicated than need be.

your method is exactly what I was gonna do prior to stripping the complete interior out.

I will still need to strip it due to the rust that has started under the carpet, but that can hopefully wait till it's in the garage to fix.

I was getting water on my rear seat.Could see it leaking from the driver`s side rear window at the top during a heavy rain.I couldn`t tell if it was originating from the cab brake lite or the rear window so I sealed them both with silicon sealant.No more water leak.

One more place if you have cab lights.

Whenever it would rain, water would leak through the center cab light, through the overhead console onto the tranny hump, wetting the carpet.

Tried new gaskets......Didn't work......New cab light lenses....So far so good.