Right side rear floor still wet after line blowout.

[wild man]

I hate to bring this subject up again, but it does still plauge me after I went with the consensus of replies that said to blow out the drain line for that corner of the sunroof. I used 200psi of pressure to blow out all 4 corner drains. And I even went as far as to disconnect the T where the fuel fill overflow connects in, and blew the lines out from there. But it was to no avail. The carpet in that part of the floor still stays soggy wet (frozen in wintertime).

As strange as this may seem, I'm starting to believe that this is one of those problems that is just simply not going to go away, no matter what you try to do to fix it. Especially considering that in the 12 years since my 1st 924 (a 77) to my 89 951S, the factory wasn't even able to correct the problem. And yes, my 80 924 and my 87 924S also suffered from the exact same issue.

Now come on, you guys are smart, right? Is there a REAL fix for it, or isn't there?

[Rasta Monsta]

Is your hatch glass sealed to the frame, and the rubber seal pliable? Hatch correctly aligned? Door drains clear?

[Grandad#3]

If you used 200 psi air to blow out the drain tube you could have blown the tube off where it connects, and you will have more of a leak than before. You should have used a long piece of heavy plastic grass trim line to push back and forth inside the tube to clear it. You might have to pull the head liner down to put the tubes back on the drain line. Best of luck.

Cheers,
Larry

[wild man]

Originally Posted by Grandad#3

If you used 200 psi air to blow out the drain tube you could have blown the tube off where it connects, and you will have more of a leak than before. You should have used a long piece of heavy plastic grass trim line to push back and forth inside the tube to clear it. You might have to pull the head liner down to put the tubes back on the drain line. Best of luck.

Cheers,
Larry

I appreciate you offering me the best of luck, but when I went about clearing the lines, I was in no mood to Fuk around. And when I was done, I checked to make sure all of the lines were connected where they were supposed to be. So at this point, I am convinced that the problem has nothing to do with the roof drain lines.

My hatch is aligned good, and the seal appears to be in perfectly good condition. Not sure about the door drains at this point, but I've never heard any water sloshing in that door when it was being opened or closed. What gets me, is how come this has been a problem for all of the cars of this series that I have owned so far (4). And it is ALWAYS the exact same spot that stays wet.

[Grandad#3]

Wild Man, You are one lucky guy not to have blown those drain tubes out. Does the floor get wet if the car is setting still when it rains? Does it get wet only after driving in the rain? If the latter there might be a body panel seam leaking. You would have to pull the carpet and sound proof up and check each seam. Have someone blow air from under the car while you check inside. That black window sealer works good plugging leaks.

Cheers,
Larry

[Icey1174]

Instead of guessing where the leak is maybe you should actually find the leak. People have offered many suggestions for you to try and none worked. When they build new vehicles they all go through a water test to make sure they are not leaking anywhere. Get the hose out and get looking!

I would advise trying to rule out one problem at a time. Did you test your roof drains with water after you blew them out? I would guess it to be possible that although they may still be intact and air passes through without a problem that there may be a small leak in there some where.

Get the hose out on the hatch and TEST it for water seal. Sometimes a good visual inspection will not work.

Check the doors, check the rear window seal to make sure it is not leaking.

At this point you need to find the source of the problem and correct it before you lose your mind guessing.

[Rasta Monsta]

Icey's suggestion is sound. That is what they would do at the body/glass shop if you took the car in for help finding a rainwater leak.

[wild man]

Although I'm not completely sure, I think the water is coming in only when it is parked, and only sometimes (when at a certain angle). That would seem to implicate the RR roof drain, once again, so maybe I need to give it another look-see. I did blow the hose off of the T where the fuel fill drain connects in, but I did re-attach it after blowing out all 3 hoses from that spot. What I haven't looked into is the possibility of a crack in the line. It looks like I'll have to do some leak testing, but it is wintertime here now (<20F in the daytime), so it will have to wait a few months (like everything else that still needs to be done on the car). But whenever a warm front comes in and we get a thaw-out, it is near impossible to keep the windows clear of fog & condensation. Let me tell you, there isn't much worse of a situation when driving than not being able to see (along with a sticking gas pedal)!

[Mark944na86]

Have you checked the sunroof seal itself? Sounds obvious, but you haven't mentioned it.

[porsche4life]

Yup..... Get someone inside the car and soak it and look for leaks... And not all 944s leak... Mine doesnt....