Just wanted to add this link showing how to remove the carpets incase it's of any help to others in the future


http://www.pelicanparts.com/techarti...our_Carpet.htm

 

Without re-reading the posts to see if this has already been covered, and I'm repeating this (even if I am this water drain business is very important) there are what are referred to as body water drains. These are *not* grommets or rubber plugs in the floorpan. There may be grommets in the floor pan that block access holes to fasteners or whatever -- I've never bothered to look for them -- but these are not what are being referred to by body water drains.

The drains are located in the area of the car just ahead of the windshield. To get to them you have to open the front trunk lid then remove the battery cover then remove the cover on either side of the battery.

There will be at least two basins made out of styrofoam I guess that are intended to collect and channel water than runs off the body ( mainly the windshield glass) from either rain, snow melt, or washing, and direct this to the ground under the car.

The basins each have a hole to which a drain hose should be fitted to ensure the water goes straight to the ground without running all over the insides of the car. Even if no water gets in the car proper one doesn't want the water just finding its own way to the ground.

I dare say the setup is designed to create a negative pressure to ensure while driving down the road air pressure doesn't cause air to flow up the tube and possibly cause water to back up and over flow or spray out and get the area surrounding the basin wet.

Let me try to save some words and post a picture -- drawing -- of what I'm talking about.

You'll have to scroll down to Post #15 to find the drawing.

(Pardon the fact it is in another forum...)

http://rennlist.com/forums/996-forum...age-holes.html

The water drains under the front trunk lid are susceptible to becoming clogged with plant litter (mainly leaves) that fall on the car and in a rain can be carried along by the rain water to the basins.

Even with no rain or washing I often find leaves in the channels and empty spaces around the front trunk seal and when I shine a flash light down in the basins I see leaves in the basin and then I remove the panels and pick the leaves out. With water added, these leaves will invariably gather and clump together and it doesn't take but just a few to block the water flow. If the water backs up and overflows the basin the water will find its own way and this can lead to water inside the cabin.

If you are finding water above the cabin floor in this case under the rear seats this is almost certainly coming from one of the sunroof drains. This assumes none of the glass seals are leaking.

So you are faced with two problems. Remove the water and this includes drying the carpets or other interior items that are wet and removing any water that might still be on the floor of the car or in some depression above the floor. Then find and fix the leak that allows the water to get into the cabin. If this is more than just some leaves gathered in one of these water catch basins -- and I sort of think it is -- this may be a job best left to a professional tech.

 

Thank you so much
I've copied the diagrams from the link you provided to keep it all in one place



1 - Water drainage: sliding roof, rear
2 - Water drainage: sliding roof, front
3 - Water drainage: tank tray
4 - Water drainage: evaporator of heating and air-conditioning system
5 - Water drainage: radiator tank









Quoting Paul 996.....

The PET diagrams were very cryptic for this particular item. Here is a picture.

For orientation. The item at the top left is your cabin filter (may as well check it) and on the far right is the Battery. You have a drain just like this on the drivers side of the battery as well but it is much harder to see/get to since it is right under something. Check em both. If you pour water in there from the hose it should drain right down the holes.

 

OK, I've checked the drainage holes in the truck (there appear to be four in total)
Three of them were blocked with dirt and mush. I've removed all the gunk and I've run some water through them. The water runs out from under the car, so I think they're OK now

I've also unclipped the rear of the headlining inside the car and found some leaves up there. I've removed them and ensured the channels are clear and I can see all the way down them

I've unclipped the drain hoses at the rear of the sunroof and blown down them. They appear to be clear too


The car is booked in at the local Indy on Tuesday for its annual inspection. I'll ask them to take a look for me, and then I'll get started on stripping the interior

 

Update time:

I got the car back from its annual inspection and followed the PelicanParts instructions posted previously to remove the carpet and interior trim. I'd say it took around three hour to remove the entire interior

I spent the last week drying everything out, and spent a bit of time today trying to find the source of the leak. I've been pouring water all over the car, starting at the bottom and working my way up. The lowest point I could reach before water started to ingress was the bottom of the rear screen. There could be other leaks too, so I'm still investigating, but this one is very large.

It seems the leak is entering from around the rear screen or engine compartment area, but it could be travelling along some double skinned sections before it actually becoming visible at the point I'm seeing. Does this look like a failure of the rear screen seal? or could it be something else?


Here are the pictures of the area I've found so far. As a reference point, I'm sat in the car, facing the rear, looking to my left.....















Excuse the dirty hands, I've been painting

 

Get most up with shop vac, then run a dehumidifier.

 

Good job and done correctly. Could seal rear window with some dumb-dumb temporarily to see if that's the issue.

 

Update time:


Good news = the glass company came to reseal/replace the rear screen today

Bad news = it wasn't the screen that was leaking!


We've got the rear screen out, and, when pouring water down the lower R/H corner of where the screen fits the water continues to leak into the cabin


There's a small rubber seal that fits between the C-pillar area and the rear-deck-panel which the rear wiper arm mounts on to. Underneath this seal is a drain hole.

Normally, When water runs down the rear of the car it finds its way into the corners of the rear screen, runs through these drain holes, and down the sides of the engine compartment

My L/H drain hole is fine, but if I pour water down the R/H drain hole it works its way into the cockpit

It appear the drain hole is partially blocked, meaning water is collecting in this panel rather than draining, and then makes its way through the path of least resistance and into the car

Since this metal panel (the one the wiper arm mounts to) is welded in place I can't remove it to see what's going on underneath

It looks like my only option is to remove this small rubber seal and see if I can find any blockage underneath it

Has anyone got any other/better thoughts?


I really appreciate any suggestions, as I quite honestly don't want to start drilling and cutting metal work out of the car



Here's a few bad pictures showing the area I'm looking at

For reference I'm standing by the R/H rear wheel, looking down the length of the c-pillar (the rear screen is removed from the car)

 

i had this problem with my amg. i used a long probe with compressed air to force the obstruction out of the passage way.

 

Compressed air nozzle with one of those rubber tips after perhaps pushing some high test fishing line down? Where does it exit, is the outlet for that side damaged?

 

google search wire worm. its a 3 ft long plastic fish that can bend yet is stiff enough to fish down the hole. i use it for fixing stereo wires into the car

 

^All great ideas that will work.