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Old 01-13-2022, 10:56 AM   #1
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1990 34.5' Airstream 345
Marina Del Rey , California
Join Date: Oct 2020
Posts: 28
1990 345LE cockpit leak on floor

Hi - sharing in the interest of knowledge for the group, and asking for advice from anyone who has had similar leaking in this way...

After the unusually intense rains here in LA (10inches in a few days) the front passenger side carpet got soaked, mostly on the side by the window. But, there was no sign at all of water running down from the window, so this is all coming in through some internal channel. So I removed the captains chair, pulled up the carpet, and found the wood sub floor was totally rotten along the edge.

I then removed the wood floor and found to my relief that the actual steel frame and the steel sheet sitting on that is not rusted, and is in good enough condition, so all i need to do is to replace the wooden sub floor...

But before I do that, obviously I need to figure out where the leak is coming in.

I knew this was a problem area when I bought the coach, but assumed that I would be able to see the water coming in. Which is not the case.

It looks like there is an internal drain channel somewhere inside the double skin or in the front radiator compartment that is running the water in.

Before I go nuts and start pulling the inner skin off on the passenger side, and start dismantling the dash, has anyone else had this exact situation? Trying to figure out where the leak is sourcing from and how to then seal it up.

I know I have a bigger project to deal with at some point, which is reseating and sealing the sliding windows on both sides at the front, but I'm trying to avoid that for the next few months.
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Old 01-16-2022, 06:40 PM   #2
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West Chester , Ohio
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Iíve been hunting a similar leak. Just found one that seems to let water in the same place as you. The tip of the bottle is pointing to a seam between these 2 window parts coming together. Water followed along between the frame and exterior skin, and found a hole in the thick white sealant used from the factory. Confirmed with different colored food coloring!
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Old 01-16-2022, 06:41 PM   #3
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Also, check for leaks at the windshield gasket. Corner of the gasket is right there and will flow downhill to the low spot on the floor
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