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Do you have to take apart the A pilllar? If you use some combination of vaccuum and air pressure can you suck/blow the gunk out? Also, 80 lb test fishing line snaked down the drain may help loosen things up. Thoughts?
That won't help if the tube has become disconnected from the elbow. As long as it is flexible enough to make the bend at the elbow, sounds like a good idea.
 

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Discussion Starter · #62 ·
Wow, I hadn't logged in in years and was surprised to still see this thread active. I'm glad it's come in handy for some!

Matt
 

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Water intrusion - drain problem or sunroof problem?

I thank all the previous posters for their information. It's been helpful in identifying how the water is getting into the cabin, but no one seems to have addressed the obvious question.

Why is so much water getting into the sunroof area in the first place???

It's fine to understand how the system is meant to drain and how to clean the drains, but the bottom line, for me at least, is that the drain was not meant to handle huge volumes of water.

In my car, the drains work fine until they is too much water. Then the system overflows from the top junction at the sunroof down the A pillar and into the cabin. So my analysis is that it is NOT a problem with the drainage, but rather a problem with the sunroof seal. If the sunroof is letting too much water in, the drains will overflow.

Is there a way to replace the seal, recondition it, or otherwise repair it so it seals better against the metal frame of the car?
 

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The whole concept of an a roof panel that can open up ... just leaves me a little cold. Does anyone actually use this thing ... I mean after the first drive away from the showroom when the vehicle is new? I usually avoid it as an option if I can. Sunlight is OK ... but wind and rain, who needs it?

If Volvo can't design a Sun roof without drain issues, I wish they would just eliminate it.
 

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My xc90 is fixed!

Thank you so much for posting all the details and images so I could fix this myself! :D I am not very handy when it comes to repairing cars. So this helped out a lot! I tore it all apart, fixed and put it all back together in about 15 minutes! This probably saved me a lot of money!
 

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Wow, what a great and informative thread! My wife drives an '06 XC90 and it always smell a tiny bit musty after the car wash or rain. I have been trying like crazy to diagnose the smell and couldn't ever really feel wet floorboards, but tonight I think I'm going to pour some water in those sunroof drains and feel higher up on the driver side floorboard.

I hope we don't have water sloshing around - I've never heard that. I still am having a hard time picturing this area people are describing that water can build up so much in. The floor under the mat feels very solid - how could that just be carpet and foam?? Could someone explain the layers starting with the floormat, carpet, then what? It can't just be foam directly underneath that thin layer of carpet - that would be like stepping onto a mattress every time you got into your car.
 

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Volvo design flaw

This is very clearly a design and manufacturing flaw, any way you look at it. This constricted bend should have never existed, yet it did, and volvo to my knowledge never owned up to it.

My family experienced a lot of grief over the wet floor, repeated trips to the dealership, and eventually their $$$ fix (at our expense) when it is clearly something the manufacturer did that was substandard, problematic, and just downright poor design any way you look at it. In any court of law, it would have been easily demonstrated to be a faulty product. My wife was put through unnecessary trips, stress, and of course I was too as a result, including hard earned cash we paid the dealership to fix their own problem.

For this reason I have no compassion or reluctance to caution potential new buyers of the next "greatest thing since sliced bread coming out of Socialist Sweden", to beware, and let someone else be the guinea pig. This is especially true of the new motor that is intended to save the planet and put more cash in Volvo's pocket. I say this sounding like I am anti-Volvo, but guys I'm an enthusiast, and if the enthusiast feels this way, it can translate into sales or lack thereof. Still an enthusiast.

This is a great thread, by the way, and I wish I had access to it when we went through the same frigging thing with our 2004.

Mr. P
 

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Poured water into the drain holes on both sides yesterday when I got home from work, and a nice puddle was on the ground behind the wheel well as intended. I guess they're not clogged! The musty smell after a rain must be due to something else.
 

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Easiest repair…EVER! Used a little Resolve carpet cleaner to clean the water stains off the A-Pillar cover. If you get a burr on the plastic screw cover from prying it off, use a nail file to knock it down. Good as new.
 

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Hi, I have a 2000 s80 sedan. Just bought it a month ago, I to am having sunroof drain problems. flooded the passenger side front. Is draining now. I took apart the drivers side an couldn't see a drain hose, yet there is a drain hole! Does the s80 only have passenger side drain tube? Any help with this much appreciated.
 

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Had similar issue with the 2008 XC70. Following the excellent write up I wad able to locate the issue. Cleaned all tubes with weed whacker wire and problem seems to be solved. Also, the two drains in the front of the sun roof were almost completely covered by dirt causing driver side to leak (stagnant water). It took a while to even find the drain on the driver side. So, thank you again for this discussion! It saved me many $ again!
 

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I just bought a 2013 XC90 and own a 2008 S40. Dealer offered a really low trade in on the S40 so I decided to keep it. The dealer said they would have to spend $2,000 to fix the leaky drains from the moon roof (car has 53,000 miles). After reading this thread, I'm convinced the dealer knew about the moon roof leaks all along and just never bothered to tell me or even inspect it during every 7,500 mile check up it performed. Pretty crummy of the service department as they knew about the design flaw.

Today, my husband cleaned the drains and performed the suggested changes to the tubings. It took a while, but he got the front and back seats up and was able to pull out ALL the carpet in the S40. The thin layer of carpet is actually adhered to about 6 to 10 inches thick of a molded type of "foam" that's more like styrofoam but squishy (and able to absorb water). The front carpet/foam is one piece on drivers side and one piece on passenger side, and the entire back seat was one whole piece.

BTW, you do NOT have to remove the center console or center cup holder armrest to take out any of the carpet. Once you pull the front seats up and lift out the rear seat, the carpet can be pulled out from under the console.

Fortunately, there was no standing water in the floor and the wires were not wet. Due to the nature of the foam, we plan on spraying it with a bleach/water mixture to stave off any mildew and will leave in sun to dry for a week or so before re-installing. We live in Florida, so sun should be out soon!
 

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The dealer said they would have to spend $2,000 to fix the leaky drains from the moon roof
I heard the dreaded sloshing sound today, after parking in the rain for a few hours. When leaving the garage early this morning, there was no such sound. So I knew I had another clogged drain, last time was maybe 7 years ago (?).

I wanted it fixed ASAP due to weather, but am pressed for time this week and didn't want to deal with it. So I took it to my indy shop to clean them out... the bill was $27.
 

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thanx to original poster for detailed pix and job description. saved me a lot of grief. my 04 xc90 was awash on the passsenger side after a rare calif. rain. more subtle than my 745, which leaked directly into the cabin...

i modified mydogutah's solution, by cutting back the hose and making a joint with the same size polyethylene for stiffness, cut back the volvo hose, made a vinyl sleeve and glued the thing together. no chance of kinking there. a larger diameter hose wouldn't fit thru the hole in the pillar.
the original rubber fitting was rotten as well.
thanx for the forum!
 

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Seems like no shortcut to the sloshing water trapped under the carpet. I think I have to remove the seats and carpets when the sun comes out this weekend. Any suggestion as to what to expect when removing the seats? I guess I should disconnect the battery to avoid the SRS activated accidentally?
 

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I did it last month when the weather was warm and dry. Took me half day to drain and dry the fish tank. The chassis is actually starting to rust badly. I am happy that it was done before more problems pop up. After that, a few really heavy rains visited but I can tell no leak at all. I think I saved my car. Thank you all!
 

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This is a great write-up indeed! I don't know why the photos won't show up on my screen (only getting the blue box with question mark) but I'm assuming it's because the post is already almost 6 years old. I don't know if this is possible, but if so can you send me the photos in a private message?
Again, thanks for the great post!
 

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The whole concept of an a roof panel that can open up ... just leaves me a little cold. Does anyone actually use this thing ... I mean after the first drive away from the showroom when the vehicle is new? I usually avoid it as an option if I can. Sunlight is OK ... but wind and rain, who needs it?

If Volvo can't design a Sun roof without drain issues, I wish they would just eliminate it.
Leaking sunroof evidenced by water stains on headliner. New S-80 (2013). Dealer states must be operator error. Any sug/estions?
 
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