Water on passenger side floor boards

There is water on my passenger side floor board, I'm not sure where it's coming in at because the truck is pretty rust free. Any suggestions would be appreciated.

 

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Heater core?

 

Update: it's not confined to a single spot. The whole under side of the carpet is wet. Initially I thought it was the cap in the first picture and maybe it had gotten old and cracked.. After I took it out I discovered it was dry and it okay shape. I'm pretty confused and have no clue what to look for. The other photos are of the passenger side with the carpet pulled up.

 

There are two common areas that make the water on the floor:
1. A/C evaporator drain pipe clogged, cracked or detached will make the water from A/C collect inside the cab.
2. Metal panels under the windshield are sealed with panel sealant. Happens that it gets cracked allowing the rain water to run into the cabin.

The first is easier to spot, detect and fix. The second is more difficult to find the leak (requires patience and garden hose) and more difficult to fix as the access is quite limited there.

 

Ok thanks, I did recently replace my windshield with a local company. Maybe they did a poor job. I will also check the A/C, but I'm pretty sure now, it's more complicated than that. Thanks for your advise.

 

Maybe. I'm not sure what I would be looking at though. Lol Where do they usually leak?

 

This might sound nuts, but I just went through this mystery with a customers truck. His a/c evap line was clear and the hadn't been running it anyways. I ended up doing the cowl seal TSB fix even though I couldn't find any evidence of leaks and he said it was damp even when it didn't rain. Heater core wasn't leaking either.

It ended up being condensation because he used a solid rubber floor mat and when the cat warmed up it got wet under the carpet. Replaced with a carpet floor mat = no more issues.

So if you are sure it's not the firewall, a/c, or heater core and you happen to have a rubber floor mat that could do it.

 

Toyota put out a TSB years ago due to firewall leakage and seam leakage in the front. My 2001 DC would be soaked in front and rear after a heavy rainstorm. I sealed the entire front area as shown in the TSB “used flex seal and silicon” and I was no longer getting a leak in the front, but noticed water in the rear foot wells and by the back wall. I pulled my rear seat down and rear wall panel to find some rubber plugs that had receded some with old age and notice water lines down from there/the back window corners. I sealed those up and after the last storm my truck is finally dry. You could have multiple points of entry. Good luck.

 

Also in my DC there’s a channel that seems to run from the front all the way to the rear. If I parked with the front lower than the back the water from the rear would go all the way to the front floor boards with major rain.

 

That's very interesting, I do have solid rubber floor mats in my truck.. hmm... thanks for the info. I will definitely try your suggestion first

 

@Jp Sturm here’s the TSB:

http://www.customtacos.com/tech.old/files/tsb/BO02600r2-9704-Leak.pdf

Edit: this is 97-04, just realized you were a 95.

 

I hope that's not the case, but it's the most reasonable one. I've decided to gut the interior (seats & carpet) and start hunting for points of entry while sealing off everything. Tomorrow I'm buying a ton of flex seal and silicon and will begin this dreaded task over the weekend. Thanks for your help!!

 

Haha it's alright. I'm down for anything at this point thanks

 

Check the sunroof drain tubing on the passenger side. Maybe the pinch weld where the drain tube drains into is blocked up with rust or other debris and it's not draining out like it's suppose to. This video will help you out.

https://www.youtube.com/embed/qalXo4etX3Q

 

Thanks, ill take a look.

 

If you do the TSB fix, I would use seam sealer from NAPA. Although don't get it on your skin, I had some on my arm for two weeks. Lol

Also check the blower motor for water entry. There is a vent tube for the motor that goes into the cowl that is a common leak point.

 

So this is interesting, as I have had water coming in through the blower motor housing. What do you do with the blower motor vent tube?

I have checked my A/C drain and it was open. I was able to pull the metal tube out. Should I have been able to do that, or ahould it be attached to something inside?

 

I attached the TSB for the repair. It doesn't say to seal that vent but if you search you'll see where it is. Basically you seal around that vent tube from the cowl access with sealant as well. It's a royal PITA to get all the way around unless you have a 98+ which has a access hole under the passenger front fender.

 

I have the same problem. I botched my cowl sealing by using too narrow ID of tubing and rushing. I'm thinking of sealing by taking the dash out.