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Sienna Water Leaks

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

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#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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