Water leaks in trunk and passenger floorboard

[mytc05]

Question about water leaks. My TC has had a water leak off and on in the trunk for years. We’ve tried to run a garden hose around the outside of trunk to figure out where the leak is coming in, but can’t locate it. The same thing is happening on the passenger side footwell area. The whole carpet area under the passenger floormat gets soaked and I can’t figure out where it’s leaking in there either. Have any of y’all seen this issue in our TC’s and know if there’s a typical area where the leaks occur? Would definitely appreciate some help in figuring out this issue. Thanks all!

[Reaper1]

I bet that the soft top storage well has one of the drain hoses popped off. The crap part about that is that in order to get to it to fix it, you gotta basically rip the entire rear interior out. No other way to access it. This can happen if the hose is clogged and someone tried to use air to clear it. It will pop the hose off of the little nipple underneath.

[Garnet & Gold]

Look in the soft top well to see if the two holes in the bottom of the well are cover over before you go to the extreme of taking too many parts off of the car.  There is a depression on each side of the well with a hole in the bottom and it can collect trash as well as water.

[mytc05]

Hey guys. The TC has been in storage the last few months, and I'm hoping to try to tackle this this week. I know the drain holes aren't plugged up, as I keep the top storage compartment very clean. I'm wondering if it's the hoses Reaper1 mentioned. The passenger side floor board and the trunk both end up getting really wet sometimes. The trunk did it years ago, and then seemed to be better after I fiddled with it, but that gremlin has reared its ugly head again. The passenger floorboard started more recently. Trying to figure it out without having to rip a lot apart. How hard is it to check those drain holes, and would the also affect the passenger floorboard in front of the seat?

[Hemi Dude]

A question for those who live where it rains. That is so rare here in the Mohave Valley AZ, furthermore, my TC is always garaged and only sees rain if I'm on a trip cross country.

[Reaper1]

You can use something like welding wire or a coat hanger to poke down in the hole to make sure it's not plugged. About 3/4 of the way down the hose is held to the side of the body with a clamp and may be slightly crushed. You might be able to tell if the hose is connected, too, by feel. I think the hole is too small to fit an endoscope in.

 

Yes, water can migrate from the back of the floorboard to the front. The floor pan has grooves in it and the seat mounting braces allow it.

 

Since it has gotten very wet, I HIGHLY suggest taking the seats and carpet out because I guarantee that the sound deadening underneath is holding moisture and it can cause wiring issues, especially for the center console as that is where the harness crosses over and there's a plug under there that can get corroded. 

[mytc05]

Thanks Reaper1! I'll try this first to get an idea before I tear into it. The weird thing is the floor behind the seat has never felt wet. Just the part in front of the passenger seat and then the trunk. I'll try this first, and then if nothing else, I guess I'll have to take the seat out and carpet up and try another hose test.