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water coming in through sun visor, how to clear drains?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by jboku, Jul 23, 2024.

  1. jboku

    jboku New Member

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    I just got a 2012 prius and after a hard rain water was pouring in through the drivers side sun visor grommet, would the front sunroof molding part 63215G be causing this leak? I attached a pic with the green circle piece as the one that I am talking about, it is literally falling apart. I do see what I think are drains at the front, under what I circled in red. it seems to be draining, slow but draining. But have no idea how to really clean it out other than stick a wire down there and root around. My assumptions on the googling I have done is the 63215G is not causing it and it is actually my drain being partially plugged up. Any help would be greatly appreciated -and thank you!
     

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  2. Tombukt2

    Tombukt2 Senior Member

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    Yeah you might want to look into getting that piece of weather stripping straightened out renewed replaced that sort of thing I have not cleared the sunroof drains on a generation 3 but in the late '80s and early '90s I had lots of Toyotas with sunroofs generally at each corner of the sunroof there's a little hole that's attached to a tube that runs down the front A pillars I think that's the right terminology and basically goes to the area where the front fender bolts just ahead of the door with the 10 mm coming up through the bottom of the fender and then in the rear they dump out somewhere near the rear quarter panels I think. In older cars these things were about a quarter inch or a little larger maybe almost 5/16 tubing You could literally take a coat hanger straightened or a long piece of wire straightened and push it through the sunroof drain until you would hear it when it came out the other end of the tube where the water supposed to go You could actually jiggle the wire up and down and hear it touching and then you could pour a little water in there and gently apply low pressure air say 5 to 10 PSI and sometimes you would hear a splat where the crap you just pushed through the tube with the air and the piece of wire the Air Force it to splat against where the water normally goes now you can run some more water through and it'll clear the dirt and crap that just hit the body panel coming out of the tube and you'll do the other for the same way that water should be running down those drains quite quickly kind of like a gutter system on a house if you will so maybe even with that plastic deteriorating if the drains were fast and working properly the water might be able to get down the tubes without getting on you but if you're moving forward with great speed like 60 miles an hour that may be a little tricky that piece of plastic trim on top of the sunroof forward of the sunroof may need to not be compromised and good luck
     
  3. jboku

    jboku New Member

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    Thanks for the info Tombukt2, I just ordered the replacement molding, with it being cracked like that it definitely increases water flow. I do see water coming out the wheel well area so will find the tube and do what you recommend with the low pressure air from down there. I am not 100% that I have found the drain up top (assume it is at the from near the deteriorating molding) so hoping going from the bottom will confirm that for me. If I need to I will pull the head liner down a bit to confirm the drain location. I'll report back once I hopefully rectify this.
     
  4. Tombukt2

    Tombukt2 Senior Member

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    I'm not sure you would want to blow the crap in the tube up into the car roof area that stuff could come flying up and drop into the cabin on the floor of the seats I would be tempted to blow from the roof down toward with the water flow down towards the ground not from the ground up towards the interior of the sunroof and then the car If the sunroof drains or any count I haven't looked at my 2010 solar roof car I might try to do that today there's not a battery in it right now If the sunroof drains or any count you should be able to take a long coat hanger or piece of steel rod maybe 3 ft long and straight and be able to gently push that down through the sunroof drain tube I'm not sure if you have one at every corner of the just two in the front or two in the rear one up front on the right and one in the rear on the left not sure the arrangements but the schematic breakdown of the car will show it and show the tubes and how they run but I would work from the sunroof towards the ground let gravity be your friend and probably the piece of wire or rod will work the best got to be real careful with the air You don't want to blow the tube off the barbed fitting that you can't get at without tearing the whole car apart but if you see water coming out of there then seems like it might be working or you're seeing just regular rain dripping off the rest of the car because it's wet I don't know I wouldn't think the sunroof drains would be pouring water through them usually the water that collects under the sunroof from rain melting ice and things like that generally is pretty minimal now if the car parks under trees a lot and you've had build up of tree crap level with your rear seal in the hatch or if your rear seal area in your hat looks like pure hell more than likely under your sunroof is similar just that it works that way dirt and garbage in those areas is a serious enemy to you so you want to keep that sunroof well clean same with the gasket well in the trunk needs to be whistle clean and be the color of the car and black color of the seal no trash should be able to run your finger around it and pick it up and it still be the color of your finger not black.
     
  5. jboku

    jboku New Member

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    Well I successfully replaced the 63215g molding across the top of the sunroof next to the windshield, but failed in stopping the water leaking in through the drivers sun visor.

    I inspected for traditional drains that I am familiar with and this 2012 prius 5 does not have those. It does have however a small gap on either side of the plastic tray (that is the image I attached circled in green). These small drains are clean and the water runs out of this small hole, past the seam of the sunroof tray that sits on the metal frame, and then down the gap between the windshield and the A pillar. I pulled the headliner down a bit to inspect and when I run alot of water down the interior of the sunroof (mimic a bad rain storm) it is leaking only from the hole in the frame that holds the sun visor clips.

    I think this whole sunroof is a plastic insert that is glued to the frame and unfortunately the drivers side glue has been compromised, so when it rains really hard the water will back up in this tray, slowly emptying out of these too small drains, and water backs up underneath the sunroof tray where it is glued and pours into the frame - water finds the least resistance via gravity and comes out the visor.

    I tried to find a way to lay down some silicon to fix this, but there is no room between the windshield and this tray to get up underneath it to properly seal it.

    I am now lost as what I should do, should I try to tackle this from the inside by dropping the complete headliner and laying down silicone that way? Or should I try to pry the tray up from the outside and re silicone it that way? There is not much room between the windshield and this tray to pry and not possibly damage the windshield. How do you guys think, how should I should tackle this?
     

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  6. Tombukt2

    Tombukt2 Senior Member

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    I guess to do it properly I believe the headliner would come out in the tray would come down that way you got to look at the schematic for the car and see I don't know if that tray lifts out of the hole from outside the car the older ones were literally screwed I believe from under the headliner that way but I don't know about these newer models what a disaster thank God our solar roof car never leaked while she was using it for all the pandemic driving It's never been opened either maybe once or twice it's been tilted.