Question about 1998 Buick Regal
I have water leaking aroubnf the heater fan blower into the passenger side of my regal. I have checked both the cabin filter area and see no leaks and also used RTV so better seal around the squirrel cage fan assembly for the heater. This morning I vaumed out about 1/2 gallon of water
I had this same problem. It is caused by water running downe the windshield and into the cabin air filter located under the cowling on the pasenger side. It is really easy to fix.
I've been told all "W" body GM cars have this same filter set up, so all 1997 through 2004 Buick Regals (mine is a 2001) and many other GMs have this problem. MY 2001 Regal would get 1-2 inches of water on the passenger side floorboard after a rain.
There are three things that can be done to prevent this and all three are quite easily accomplished. There is a water diverter weatherstrip above the filter that can become dislodged. Mine was out of place even though the filter had never been changed. I used RTV to glue this weather strip back in place. I also made a cover out of an old plastic 1 gallon antifreeze jug by cutting the ends off and then splitting it down the middle and doubling it to cover the filter but still remain above it so that air is not blocked. This is so that even if the diverter becomes dislodged again this still won't let water get to the filter. Once you pull the coweling, which is very easy to do with one plastic screw like fastener and two plastic "rivets" that you just pull out with needle nose plyers, you'll see what needs to be done. You'll need to use the ignition key to stop the wpers in mid-stroke on the windshield and open the hood to get clearence to the cowling. Speaking of the coweling, lastely I put a bead of RTV between the coweling and the windshield before puting it back on.
So for one tube of RTV, one old plastic jug, one hour of time using a pair of pliars and a knife I have fixed what had been a real PIA water leak. EASY!
Posted on Dec 30, 2008
There is a drain that must be plugged . it drains the condensation from the evaporitor on the AC system. these need to be cleaned once in a while. look from under the car around the firewall . you will see the tube. stick a wire up it to clean it out. and it will dry up.
good luck paul
Posted on Sep 12, 2008
I had the same problem, it happened after changing the cabin air filter. So what I did and it fixed it was to use silicon and where the plastic cover over the air filter attaches there is a rubber gasket that is supposed to seal between the glass and the plastic cover. I carefully used the silicon and sealed all across the top of the plastic cover all the way towards the passenger side of the windshield and that fixed it. It's just a lousy rubber seal and not heater core or anything else, just seal from the center of the windshield all the way to the farthest side of the plastic cover. No problem.
Posted on Jul 27, 2012
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