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Sienna Water Leaks

53 messages,  Last post on Nov 17, 2009 at 4:40 AM

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#45 of 53 Re: Mystery leak in Cargo area 04 Sienna [gail17] by JOEE78 Sep 14, 2009 (3:06 pm)
Replying to: gail17 (Sep 14, 2009 4:50 am) SINCE IT DOESN'T RAIN MUCH,THE DEALER,BODYSHOP SHOULD BE ABLE TO PRESSURE WASH VAN TO SEE HOW WATER IS GETTING INSIDE.EVEN THESE NEW CAR WASHES THAT USE HIGH PRESSURE WATER(NO BRUSHES) WOULD BE STARTING POINT TO LOCATE ENTRY POINT OF WATER,REAR HATCH PERIMETER SEAL IS A KNOW PROBLEM AND WATER WOULD LAY IN BACK,SHOULD BE EASY TO LOCATE LEAK WITH A PRESSURE WASHER.      GOOD LUCK.     JOE
#46 of 53 Re: Waterleak in the storage area [jmbuddies] by jmbuddies Oct 24, 2009 (10:14 pm)
Replying to: jmbuddies (May 16, 2009 3:18 pm) Hi All,   Sorry I took that long to respond, just in the last couple months I have come to the bottom of this problem (at least I thought) and I know a lot of you are anxious for the fidings so here is:   After countless trips to the dealer, (I told them next to that, I will move in, set up my sleeping bag right in the showroom) they decided to pay to replace the entire carpet and door hatch seal (this seal goes on the body of van in the perimeter of hatch door) their cost of $2,100 (sorry I really don't feel their pain...) after job was done , they were very proud of their work and called me to pick up my van. I asked them again if it leaks, "oh no, we ran water over it for hours, it's bone dry" -they answered. So I went home and...I just had that urge to take a peek...so I removed the chairs and lifted the rug...it was soaked. Drove back and showed it to them, they were surprised? so I left the van there AGAIN. After a couple of days picked it up and again they said was day. By now, I am an expert in the detail field of auto mechanics!!!, so I removed the trim by the slide door driver side, lifted carpet and put my hand in there, yes you read my mind...it was really wet. At this point, they said they are going to take my van to a water leak specialist, now that's an advancement in the rational thinking in this irrational world, I mean, I've only been farting around with this leak problem for 2 stinking years , and just now you just came to that conclusion? Brilliant! Anyway, after I got my van back, I saw some metal shavings in the back, offcourse no one knew where they came from, it looked like someone drilled something. So I went home, and peeked again, well, me and my beloved wife spent our Forth of July, removing the carpet all the way up to the driver seat, on our knees scrubing the entire van floor from the mold that already had grown. In addition to that, I found holes drilled in the body of the van, right under the hatch bottom molding, and voila! The water would came into the frame (there are a couple wide hole openings and inside there, I could see holes drilled, I could see light from outside. I was not a fortunate owner of a 12 gauge, but I whished someone had remembered me in the last Christmas! (no I would not use it on the van or the wife...) So the dealer was surprise again to see holes in the van. Their theory, "we don't really know where the water comes from, but we sure know how to get it out..." Ok, I admit that there is no water coming inside the cabin area now, so the carpet remains dry, BUT now it seems to pool in the hatch door from outside. So after it rains, and I open the hatch, water comes gushing out of the handle from outside, and that is where I am at. Don't really know how it gets there. Hopefully that does not cause a problem in winter in the freezing temperatures, we'll see... So the dealer wanted to give us "new horses" at the tune of $23,000.00 for a brand new 2010 Toyota Sienna (actually I think is their cost), an idealistic perfect solution for a water leak, right? No, my wallet got constipated...so the the genius had ANOTHER solution, a bumper-to-bumper premium warranty for our "holly bucket" for 2 years or 24,000 miles...I took that because they did not have another van to trade-in with, and that is all folks! If you wondering about all this "comedy" written in this post, is because, if I ain't laughing...I'd be crying for a loooong time. Maybe I should write a book about this a nd sell it on the internet, and make millions!
#47 of 53 Sienna water leaks by philobrien99 Oct 25, 2009 (2:26 am)
Hi all -- I've got a 2000 Sienna, bought used 1 year ago, and have similar problems as everybody else on this forum. What a nightmare! I have at long last found a temporary solution -- not satisfactory in the big picture sense, but in the short run anyway, it seems to help. Fortuitously (by design ??!?) there are removable plugs, about the size of a quarter, directly underneath (on the bottom of the frame, as in, lay on the ground to find these) the driver's seat and the passenger seat. There is a slightly smaller one at the back. underneath the rear hatch (again, UNDERNEATH on the frame) under the rear hatch, driver's side. I removed these 3, and so far this fall/winter, no new water has accumulated beneath my feet in the driver's compartment. Like I said, not an IDEAL solution, because it does not actually solve the root problem, but at least my feet aren't sitting in a wading pool ......
#48 of 53 Sienna 2002 water leaks by jlow6 Oct 28, 2009 (6:22 am)
Our leak showed up after we'd owned our used 2002 sienna about year and a half last month. I soaked it with shampoo/lysol, then vacuumed , dried blowed, etc. No luck , especially since we've been having soggy weather. My independent mechanic took a day & half to figure it out, partly thanks to you. Keep your fingers in the dike, thanks. Replies to this message: sukisszoze (Oct 30, 2009 10:28 pm) JOEE78 (Oct 31, 2009 4:14 pm)
#49 of 53 Re: Sienna 2002 water leaks [jlow6] by sukisszoze Oct 30, 2009 (10:28 pm)
Replying to: jlow6 (Oct 28, 2009 6:22 am) jlow6, what did your mechanic do to fix the leak ? Thanks Replies to this message: JOEE78 (Oct 31, 2009 4:14 pm)
#50 of 53 Re: Sienna 2002 water leaks [sukisszoze] by JOEE78 Oct 31, 2009 (4:14 pm)
Replying to: sukisszoze (Oct 30, 2009 10:28 pm) WE WATER TESTED WITH A PRESSURE WASHER AND FOUND REAR HATCH LEAKING INTO INSIDE OF VAN,AND WATER THEN ROLLING UP TO FRONT OF CAR UNDER SUB FLOOR.      HOPE THIS HELPS      JOEE78
#51 of 53 is the leak still a problem on newer models? by doggrandma Nov 03, 2009 (10:38 am)
I have been trying to decide on a new vehicle, and the Sienna and the Odyssey are 2 of my favorites. I looked at both at a Carmax dealer and noticed some odd spots on the interior edges of the rear hatch on the Sienna. It looked like small spots of mold to me, but the salesman assured me it wasn't, insisting it was just some dirt.   After reading this thread, though, I wonder if it really was mold. Are the Sienna vans still having leak issues? Replies to this message: ateixeira (Nov 03, 2009 1:21 pm)
#52 of 53 Re: is the leak still a problem on newer models? [doggrandma] by ateixeira Nov 03, 2009 (1:21 pm)
Replying to: doggrandma (Nov 03, 2009 10:38 am) Not on a large scale, but a few have issues, of course.   This van is suspicious so keep looking, they're plentiful on the used market.   Mine's been flawless, but it's not for sale.
#53 of 53 '04 Sienna water pooling in back by soggysienna Nov 17, 2009 (4:40 am)
Well, I feel everyone's pain here. I noticed water filling up in the back of my Sienna since 2005. Under warranty, the dealer tried to find the issue. The first time; of course, they used the old tried and true method of a high pressure wash. The result was that the window on the "liftgate" (tks wireyourworld) was leaking around the seal. So they removed the glass, installed a new seal and reinstalled the glass. Next rainfall I had more water. Dealer tried the high pressure water again and found that the passenger side, tail light was not sealed correctly and water was getting in their as well. This too was removed resealed and replaced. No less than 3 weeks after, still having water coming in. The dealer decided to have a body shop take a look at my van. They removed the all of the carpet in the rear of the vehicle and said that a metal seam in the body of the vehicle was leaking. This was repaired by using some sealant on the seam and everything was reinstalled back to original condition (along with a full detailing of the inside and out). A month passed before I noticed more water. The dealer took it back to their body shop and removed the interior. Yes, carpet, seats, head liner, door panels and even the dash. They found that a small rubber grommet was missing somewhere near the top of the passenger sliding door (also told me that this would fix my whistling noise I have complained about coming from that same area). They installed a grommet in its place and detailed the van again, but that didn't fix it either. Another 3 months went before I was in again to have the full interior removed once more. This time, they could not find any water leaks (although there was a pool of water where the rear seats fold into the floor. Their solution - RockGuard. They apparently sprayed the entire interior body with RockGuard and replaced the interior once again. Well that didn't work. I am still having this problem and now without warranty. The body shop did give me an anti-corrosion warranty for the lifetime of the vehicle though (I am not joking).   So I have put up with this problem, until yesterday. Cardboard boxes in the back were destroyed after a heavy rainfall. I had not complained since my last visit to the RockGuard specialist. I called the service manager and let him know that I was still having water problems. I was told that the van was no longer under warranty. He was told that the problem was never fixed and that I expected that the original warranty repair was never completed to my satisfaction. He made a few phone calls and said that they would take it back to the body shop, they would have another look at it early next week and "we would go from there". I am not sure if this means that the warranty will cover it or not.   I am on my way into the dealer today for a little face to face with the service manger and his body shop manager. I guess my message just doesn't get conveyed clearly over the phone. I will keep you updated.

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