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Thread: Cabin Water Leak 08 Town Car Right Side

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  1. #1
    I post a lot...
    Join Date
    Dec 2011
    Yonkers NY

    Default Cabin Water Leak 08 Town Car Right Side

    I had a water leak same as Scott's apparently. The RF floor gets wet but the RR floor became a regulation mouse size hockey rink in the cold. It got deep. After doing the repair I have been wet-vacuuming it 2-3 times per day for 5 days. The front is now just slightly damp but the rear is still wicking up wet. Finally seems to be slowing down.

    Before doing the repair you might want to clean the drain as shown in a pic below.

    The right side cowl cover comes off with 2 (#1 size Phillips) long plastic screws. When installing you can just push them in. Make sure you caught the hole. The plastic part beneath this, I will call it the "Catch Basin" comes out with iirc 4 nuts and 3 hex head bolts. I previously added a cabin filter to this which seems to be working well BTW.

    The foam gasket on the bottom of the Catch Basin ages out. Mine looked perfectly fine when I 1st removed the catch basin some months ago to clean the intake screen and fab up the filter. . With the cowl off I pored water down the windshield and saw now leaks into the cabin air intake. However after some time I noticed the foam was saturating and leaked slowly on the second bucket of water on the windshield. I guess a good long rain and a slow leak really accumulates water. The foam still looked good but it was porous when wet.

    I used a Frost-King weatherstrip, Scott used 3m weatherstrip. In retrospect I might have just used the 3M Strip Calk which I keep on hand but I had already picked up the Frost-King stuff. I use the 3M Strip Calk to re-seal the Catch Basin hex screws. As someone else suggested I put the weatherstrip seam on what is the forward part of the Catch Basin (near the drain) when it is installed to reduce the chance of a leak there as water pours into the basin from the rear, windshield side.

    An easy & Quick fix which appears to work well. Might as well add the cabin filter while you are in there. http://www.grandmarq.net/vb/showthre...ighlight=cabin

    Thanks Scott.


    The Catch Basin Drain Click image for larger version. 

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    Cowl & plastic screw Click image for larger version. 

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ID:	51604 Catch basin With & Without Cabin Filter Click image for larger version. 

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    Bottom of Catch Basin with new Gasket Click image for larger version. 

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    Last edited by jaywish; 02-07-2019 at 06:58 PM.
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