Water on floor of vehicle after rainfall

[jmichaels Junior Member Find all posts View Profile Close jmichaels]

Racks or the windscreen as mentioned above seem like the obvious answer. I'd pull back the carpet and then run the hose around the windscreen and also roof rack mounts to try and nail down where the water is coming from. Did you notice if any of the seat belts were wet too, as the mounts are normally above the seat belts, which get wet first before trickling down.

I would like to remove the roof rack. Can you either explain how to do that OR can you point me to a video? Thanks.

[JaCaDaK Lurker Find all posts View Profile Close JaCaDaK]

When we had a 3 Rhino Sportz roof racks fitted when we bought a used 120 about 5 years ago the Toyota dealer fitted them as part of the deal ,
It rained pretty heavy in the first week of us owning it and we noticed the front seat belts felt cold , and on inspection we discovered they were wet , and the carpet on the floor directly below the seat belts was also wet ,
I took off the clip-on frame lining and it was very wet ,i left linings off and went back to dealer and they removed all racks with the special "T" spanner , which exposes the roof mounting screws , cleaned roof channels and found the front rack mounting screws didn't have correct plugs(a couple of green ones) so correct ones got fitted ,
when I got car home I removed the racks and put some Sikaflex roof and gutter over the screw holes and plugs then replaced the racks , and left the linings off the inside for a week and dried the carpet out with a heat gun , next time it rained I checked no more leaks and none in the last 5 years , cheers john

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

I would like to remove the roof rack. Can you either explain how to do that OR can you point me to a video? Thanks.

Google remove roofrails and a few videos come up. Or google Pradopoint+remove+roofrack and tgere are some pics and description.

[jmichaels Junior Member Find all posts View Profile Close jmichaels]

Google remove roofrails and a few videos come up. Or google Pradopoint+remove+roofrack and tgere are some pics and description.

Thank you. It is hard to find because it is under "GXL" and not 120.

[tez1 Junior Member Find all posts View Profile Close tez1]

I'd just run the hose around the mounts first before pulling it all apart to see if they are the culprit, or if its coming from elsewhere.

[Clarksnow Lurker Find all posts View Profile Close Clarksnow]

Understand this post is old, but I’ll add to it, so I can get some help. Starting to get leaks on the 120 series Grand, 2004 model, have owned since new and hence know the history. It has never had the roof rails replaced or anything else. The floor on the passenger side is wet. The drain tubes have been cleaned. But I’m still getting a wet floor and yesterday there was water dripping from the left side of the passenger sun visor. I’m at the point where I just want black silicone seal the sunroof forever and disconnect the electrics. Last point, the windscreen is cracked on the bottom on the passenger side, so will get that replaced under insurance, I have been told that if the windscreen repairer sees any issue with the frame, he wont re-install and I’ll take the car to a smash repairer to look at any corrosion. I’ve now got a 300 series, but have kept the 120 series as it’s such a reliable car, much more reliable than the LC300 series. As the post and string is old and I have a reluctance in creating new posts on same subject hopefully someone replies.

[06Grande Lurker Find all posts View Profile Close 06Grande]

Hi Clarksnow my 06 Grande had exactly same thing happen. The drain holes in the sunroof slides were blocked with dirt/mud so water would overflow into the roof lining and then drip down near the sun visor into the passenger footwell when the car pointed downhill. I thoroughly cleaned out the holes and drain tubes by running some whipper snipper line through them from top to bottom to clear out any blockages, and I keep an eye on any dirt build up in the slides. Doing this resolved my issue. Good luck!

[JohnCW Junior Member Find all posts View Profile Close JohnCW]

My wet floor was due to the bung in the floor that would appear to cover the body to chassis mount has shrunk and was allowing water thrown up from the front wheels to enter under the carpet. The bug can be easily accessed by removing the bottom kick rail and then the side kick panel. The carpet can then be rolled back to reveal the rubber bung.

[JohnCW Junior Member Find all posts View Profile Close JohnCW]

My wet floor was due to the bung in the floor that would appear to cover the body to chassis mount has shrunk and was allowing water thrown up from the front wheels to enter under the carpet. The bug can be easily accessed by removing the bottom kick rail and then the side kick panel. The carpet can then be rolled back to reveal the rubber bung.

Should correct the above, after some more heavy rain with the car stationary, wet passenger floor again, so clearly not coming up through the floor. Removed the windscreen cowl and cleaned a lot of 'compost' out of it, and down the guard channels. The front wheel mud flaps really need to be removed to get it all out (3 screws and they just slide outward of a clip). Just used the garden hose to flush it all out.

Not convinced that is the problem, but will soon know, as the forecast is just rain, and more rain.

P.S. Removing the windscreen cowl is a VERY easy job. There is a video on how to do it on a Lexus GX470 (a fancy USA Prado). The dots indicating where the front clips are located was the most helpful thing.

[JohnCW Junior Member Find all posts View Profile Close JohnCW]

No, cleaning the windscreen cowl tray was not the solution. BUT, thought I'd take another look at it and seal up any joins. Well there aren't really any joins as it a one piece construction with no cables etc passing through it in any critical place. The only 'hole' through it is for the cab air intake 'flange' that rises up above any potential water level in the tray. It's dry and dusty inside so its not the problem. But cleaning everything up, noticed the sealant on a join just below the windscreen corner had deteriorated, fell apart in my hands when touched. The seam underneath is showing signs of surface rust. This seam is right below the bottom windscreen corner, both sides. Sort of tucked behind the bonnet hinge.

This seam is actually in a critical location as the water that runs of the roof and windscreen and down the side of the windscreen comes of the screen right across this seam. So even in light ran a lot of water is passing over it. I've got a feeling this may be the culprit. When the current rain stops, and the seam can be dried up, going to reseal it. Hopefully this may be the fix.

[JohnCW Junior Member Find all posts View Profile Close JohnCW]

After days of heavy rain and not a drop coming in, 100% certain the issue has been fixed. It was definitely something related to the windscreen cowl tray. As the buildup of old leaves was cleaned out of the tray and drain channels (requires removal of front mud flaps), the air intake resealed, and the seams just below the windscreen lower corners also resealed, not sure which bit did the trick.