: Roof/Sunroof leak. Drain tubes ???

09-30-08, 09:34 AM
I need help people, as some of you know, I live in South Florida, and the summer months (wich doesnt change here till like November) it not only is very hot, but it rains like in the Amazon, I mean Tropical downpours wich can flood roads inside of 15 minutes.....My point being, I have sunroof wich was leaking, I did blow out the drain holes etc, etc. The drain holes are functioning well, they are free and clear. But The other day we had one of those downpours and when I cam back to my car it was soaked inside......I think the sunroof seel is so bad, that during heavy rain fall, the drain holes (even when functioning properly) cant handle the load., and it comes in from the pillars, the rear handles, and even drips down the front window from the headliner.....Overflow I guess...Im ruining my enterior, any suggestions on how to re-weatherstrip my sunroof? Or any other input at all would be greatly appreciated.....Thankyou in Advance.....

09-30-08, 10:19 AM
While most don't recommend blowing out the drain lines for fear of disconnecting them, others have recommended weed wacker line to clear the drain lines. I tried that and it just didn't work...not strong enough. I used picture frame hanging wire and purple power with water to clean mine. Hopefully yours are still intact.

09-30-08, 11:57 AM
I run water through them and see it draining below as it should. Its not the drains (theyr good) its the sunroof weather strip. It allows too much water through and the drains cant drain the water fast enough......

09-30-08, 12:40 PM
You might try posting your problem in a car forum rather than an engine forum.

09-30-08, 04:59 PM
Its Northstar...AND technical discussion..:bulb:

09-30-08, 07:42 PM
.............and the headline fine print says: "Performance discussions relating to the Northstar System (intake, exhaust, cam, etc.)."

So, technically, you're in the wrong forum......and this thread goes in Seville, Deville, the Technical section, but not here..........:thepan:

09-30-08, 09:14 PM
As far as I know you don't work on a Northstar engine through the sunroof.

10-01-08, 06:05 AM
moved where it belongs

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10-01-08, 08:20 AM
ok guys, I get it....

What happens if the drain tubes come off........It should flow the water out through that galley anyway correct?
Or could that be why Im getting wet pillars and water over flowing from the head liner....

10-01-08, 10:00 AM
OK, Now we're on the right track in the correct forum........

Yes, when one or more drain tubes come off the nipples the water drains down onto the headliner and then finds its way through the low points to wherever it drips and soaks stuff, whether down the A-pillars or across the rear and down the interior sides and sail trim. The hoses are originally secured with wire ties but they eventually lose their grip, so now it's time to lower the headliner and fix the tubes.

BUT, the drain tubes can only handle so much, as in: drips. If the glass gasket is shot, nothing will drain off that amount of water in a t-storm and the tray will overflow, creating much the same problem as plugged tubes.

I sure hope you have a factory (Helm) service manual.

10-01-08, 12:59 PM
it does sound like one became disconnected from the pan or somewhere along the pillar, it happened to me a real pita

10-03-08, 09:05 AM
Thanks SUB. Im not affraid to remove the headliner, but I think the sunroof seal is shot....remember, South Florida, 100 degree weather, lots of sun, humidity, rain......car has been here since its conception(2001)...so if I do all the work , it might not make a difference unless I fix the sunroof seal......I have to figure out witch one to tackle first....Thanks for all your input......

10-03-08, 09:15 AM
Something else......there was a post about this a short while ago......down under and inside the front fender area, where the front drain tubes exit, the poster said there were some sort of flapper valves on the ends of the drains, and these had curled and sealed shut. I went under and looked at mine.....no flappers, just open tubes. But it's a thought. The valves would probably be used to keep the tubes from gurgling when the ventilation system is on.....

A good aftermarket sunroof shop could easily replace the gasket/weatherstrip......it's a special bead with a seal ridge molded in.

11-12-13, 01:52 PM
Thought I could add this here just in case anybody else looks this up and needs advice. Sorry if anybody gets annoyed about necromancing an old post but I hadn't seen this method adapted with the drill before and it seems like a good idea, especially as it made it way easier (I couldn't do this by hand).

You can use weed whacker line with warm soapy water to clean out the drain tubes. I pushed it down until I met a blockage then I clamped the line in to the chuck of my drill and slowly spun the line whilst pushing in and out to clear the blockage. I did this faster and faster until it was completely clear. You will need to use a stiff straw on the weed whacker line (run it inside the straw) to prevent it twisting whist you spin it and push it into the drain tube. The tube can now drain a liter in a couple of seconds, it was overflowing into my headliner with just rain :( ... Be careful as those tubes are made of rubber ... but this definitely worked for me ... good luck!

11-12-13, 02:29 PM
Good post - I'll move the thread to Cadillac Tech Tips.

11-12-13, 02:45 PM
Thanks :)

03-27-14, 10:30 AM
I've had the same problem, and after hours of troubleshooting i found that the sunroof tray leaks at several seams along the sunroof tray. Just aft of the forward drain tubes theres a bracket that attaches to the tray. When the drain tube can't handle the amount of leakage, water leaks through these seams, in fact in pours out. my car is in the shop to see if these seams can be sealed but to get at them the head liner has to be partially removed. $$$$$ $$$$. I'll never have another car with a sun roof. Hope this helps you.. The same condition is at the rear drains, but i was able to seal the seams my self.. it's a pain for sure.. hope you get your leaks fixed.