Question about 2000 Buick Century

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2000 buick century rain water leak: The rain leaks into the car through the firewall behind the glove box. The cowl drains are not plugged. I calked the cowl cover where it touches the windshield. It leaks a lot when the car is parked uphill. It leaks little or not at all when parked downhill. Any cures or testing ideas would be greatly appreciated. Thanks, . . Dragon

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Turn wiper on until straight up then turn off ignition.
Open hood and disconnect the hard washer hose from the clips on the passenger side cowling.
remove the 3 plastic screw/ clips that hold the cowling in place and remove it.
Check the cabin filter is properly seated .. (probably needs replacement anyway).
Most of type of these cars (GM) have the same issue with the cabin filter If the gasket wears out or it;s not seated properly or missing completely water enters through the vent

Posted on Apr 01, 2011

  • Dit Dragon Apr 01, 2011

    Thanks for your response; here's a little more info.

    I just changed the cabin filter. It seemed to seat okay, but I wasn't happy about the built-in "gasket" around the edge of the new filter. When I checked it after a rain, the filter was covered with a pool of water. So it seems the water does not leak through the edge but directly through the filter. I poured that off the filter, and that's when I put the chalking around the cowling cover where it contacts the windshield to try to keep water from getting to the filter. But, water came in during the last rain. I'm thinking there needs to be another cover of some kind over the filter that sheds water but lets the air in. The cowling cover isn't doing the job.

    Thanks again, Dragon

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