Weird interior leak spot after heavy rain

[IllusionX]

Originally Posted by WeeYari

OP does not have a sunroof. He most likely does have an issue with the windshield sealant.

how doe you know OP doesn't have a sunroof ?

[WeeYari]

Originally Posted by IllusionX

how doe you know OP doesn't have a sunroof ?

I'm just that good

[honestabe]

I'm having the same issue with my 08 2-door HB base model. I don't have a sunroof. My windshield is brand new and I had the glass company do a good leak test and they couldn't find anything (we doused my windshield all around full blast with my hose). My Yaris does have rear end damage and I have noticed a small puddle of water on the left rear interior trim piece next to the hatch area carpet on the plastic trim. Suggestions where to look without me resorting to pulling my whole interior?

[jcboy]

Originally Posted by honestabe

I'm having the same issue with my 08 2-door HB base model. I don't have a sunroof. My windshield is brand new and I had the glass company do a good leak test and they couldn't find anything (we doused my windshield all around full blast with my hose). My Yaris does have rear end damage and I have noticed a small puddle of water on the left rear interior trim piece next to the hatch area carpet on the plastic trim. Suggestions where to look without me resorting to pulling my whole interior?

1) It is possible that the leak from the windshield rubber is ON THE SIDES, thus after a bit of water gets stuck there (or when its continuously raining) and you use your car, capillary action gets it to crawl up and show up on those corners of the headliner.

Just a thought, as my previous car also had the same problems when it rains or after a carwash, and even after several leak tests the problem doesnt show up. Only to figure out it leaked on the sides of the windshield rubber.

Additional ideas:
2) The weatherstrip on the frame where the door meets the frame (that goes from the B-pillar floor up that pillar and continues to the A-Pillar and back down to the kick panel) is not as flexible and firm anymore, thus water is able to seep through. --> this seems to be the more likely culprit for yarisugi, as can be deduced from his picture.

3) The welded area on the roof rubberstrip is rusted, causing water to enter the ceiling from there.

[CTScott]

Originally Posted by honestabe

I'm having the same issue with my 08 2-door HB base model. I don't have a sunroof. My windshield is brand new and I had the glass company do a good leak test and they couldn't find anything (we doused my windshield all around full blast with my hose). My Yaris does have rear end damage and I have noticed a small puddle of water on the left rear interior trim piece next to the hatch area carpet on the plastic trim. Suggestions where to look without me resorting to pulling my whole interior?

Good points on the windshield leak above ^.

For the rear leak check the hatch weatherstripping for tears or small holes. Also, check the taillight on that side to make sure that the foam gasket behind it is fully sealing to the body.

For both you an the O.P. the front leak could also be caused by a failure of the roof seam. The center stretch of the roof is tack welded and then seam sealed into place. If there is a void in the seam seal, water could leak through that and onto the top of the headliner. To check that seam you would gently pop off the rubber trim strip that covers the roof seam.

[nookandcrannycar]

Originally Posted by WeeYari

I'm just that good

LOL. ()