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Hard learned lesson on Cab water leak

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In another thread, I described the tribulations involved in removing the rear seat and pax side rear inner sidewall of my 2000 Cab .... all in an attempt to find the source of my water soaked carpets behing the pax seat and under the right back seat.

Today, I finally finished, but have no idea how long it will take that high density foam padding to dry, after I vacuumed and towel blotted it all afternoon.

Here is the lesson learned for you Cab owners: a small plastic drain tray runs along the side wall behind the inner upholstery panel beside each back seat. A right angle fitting leads from the low point, sideways through the inner body panel and into the void ahead of the rear tire. If you remove the rear wheel, then the forward side wheel well liner, all you see is the metal body panel right behind it.

Almost at the bottom of the body panel is the outlet for the drain tube. The outlet itself is a simple plastic check valve with a rubber flapper valve about the size of a nickel. Therein lies the problem. The rubber was stiff with age, and gummed up about 90% with the same kind of crud you clean out of your gutters ... fine, wet, black gunk. When my car was out in the pouring rain at the airport for 2 days, the 10% drain capacity left was clearly not enough to handle the water flow, and a gallon or so ended up in my back seat floor.

I pulled the flapper off, blew out the drain with air, then soaked the flapper in Lexol conditioner to soften it before reinstalling. Considered leaving the rubber flapper off, but was afraid that road debris might come in the other way to block it. Going to pull the driver's side wheel and liner tomorrow.

My car has been kept in a garage ... no reason to suspect more than average debris in the drain. You Cab owners might wish to add this to your "check every now and then" list.


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