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Mercury Grand Marquis Water Leaks

42 messages,  Last post on Jul 21, 2009 at 8:12 AM

You are in the Ford Crown Victoria/Mercury Grand Marquis Forum. Your Hosts are pat & karens

What is this discussion about? Mercury Grand Marquis, Auto Body, Auto Repair, Sedan


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#13 of 42
Re: Merc Water leak [beaton38] by pat HOST
Jul 16, 2007 (4:54 am)
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Replying to: beaton38 (Jul 16, 2007 4:26 am)

If you can figure out how to get to the past posts...

The page links on the gray bar above (and also below) the list of messages will help display the previous messages within a discussion. And the keyword search on the left side of the page will help find other discussions and messages. Hope this helps!
#14 of 42
Re: 2001 Merc water leak [mtnman1938] by ifixleaks
Sep 28, 2007 (3:42 pm)
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Replying to: mtnman1938 (Jul 15, 2007 8:08 pm)

Sounds like you need to watertest the car yourself. Hopefully you know a little about how to remove interior trim. Its easy . Pull the side plates off and lift the rug up in the front. Park the car the way you normally do ..uphill downhill rightside higher...left side higher. Slide the seat back so you have lots of visibility on the floorpan. Dry it out so you dont get fooled by existing water. Heater will work fine. Get out the hose. clean the hose so not dirt is on it ..dont want to scratch the paint. Approach the car from the pass rear and set the hose on the roof. Put a towel down so the metal hose end doesent scratch the paint. Put something like a block of wood on the end of the hose so that it stays there. turn on the water so it rolls towards the front and down the windshield...and over the front and hopefully rear door. Let the water run. Be patient. Get out your flashlight and open the pass front door so you can observe any water trailscoming in on the drivers side. If your sight is bad puff some baby powder over the floorpan and up the sides . wetness or trails will be more obvious with the powder. Eventually the leak will show itself. Let me know what you come up with. Sounds like we will have to figure this one out ourselves since the dealer doesent know how to fix leaks. I do. All other replies in this section tell how to fix the passenger side leak but they dont apply to a driver side problem. Write back with a full explanation of what you come up with and I will help you figure this out . Been doin this 25 years.
#15 of 42
Water Leaks by vernes97
Sep 29, 2007 (6:39 pm)
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I have a '97 Crown Vic which use to have a water leak on the driver's side carpet. I had to remove the wiper arm on that side and lift that plastic tray up and clear leaves and other debris that had plugged a weep hole. I used a long piece of plastic (12" cable tie worked for me) and swished it around until water began running out behind the drivers side front wheel as it should. I have not had a problem since and it has rained cats and dogs here on several occasions. The whole procedure takes about an hour as there are five or six screws to be removed and a plastic snap off rivet to be removed but you only have to do this once. Hope this helps.
#16 of 42
Re: 2001 Merc water leak [ifixleaks] by mike41356
Oct 11, 2007 (7:55 am)
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Replying to: ifixleaks (Sep 28, 2007 3:42 pm)

I came across your post looking for ideas on how to fix mine, and sure enough I've seen here that a lot of folks are with the same problem. I know were the water is coming in, right thru the lower plenum (I think that's how is called) which indeed is the lower portion of the outside vent. I did the clean up and check up of the gasket but it looked good to me I applied a bit of plummers putty to the
far right side of the gasket to cover every gap, and still it leaks when I put the hose like you said on the roof towards the right side of the windshield. My idea is if there is a gasket right at the firewall were it meets the
plenum inside the car, how can I replace this without messing to much withtall that plastic, my Grand Marquis is a 92 and after all those years things can get pretty brittle.Thanks for your help.
 
Mike
#17 of 42
Re: 2001 Merc water leak [mike41356] by beaton38
Oct 11, 2007 (8:11 am)
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Replying to: mike41356 (Oct 11, 2007 7:55 am)

Hi Mike! I think the only sure way to stop this leak is to do what the previous posts say. The dealer did my 2001 Town Car, but charged me a little less than $200.
 
I think Ford Motor Co should have had a recall on all these Ford Crown Vic, Mercury Marq, and Lincoln town cars to fix this problem but they have not! Bill Eaton
#18 of 42
Re: 2001 Merc water leak [beaton38] by mike41356
Oct 11, 2007 (10:54 am)
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Replying to: beaton38 (Oct 11, 2007 8:11 am)

Hi Bill;
 
After my first posting, I did called the local Ford dealer in which I have a friend working at the parts dept., and asked him if he had heard of that problem, he said no but in fact he has a 92 Marquis as well and it leaks at exactly
the same place, but he did not mind as long as it drives good. After checking for the gasket he said the same thing mentioned here, they sell the entire plenun for $65.98. So
I will start today by taking that air intake out and prepare the gasket myself with plummers putty, and observe
how it behave before closing that area again. I will also look for a drain tube that should be somewere around the A/C plenum at the engine side firewall to see if it is clogged., By the way do you know were it might be?. Thanks.
Mike
#19 of 42
Re: 2001 Merc water leak [mike41356] by vernes97
Oct 11, 2007 (4:39 pm)
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Replying to: mike41356 (Oct 11, 2007 10:54 am)

That black plastic tray which is under the plastic cover with the slots and holes for the wipers was filling up with water on my 97 crown vic. After I got the leaves and other debris out of it I felt a small round hole at the bottom right side.This is the weep hole that I referred to in my previous post. I swished a 12" cable tie around in it and water immediately began draining behind the drivers side front wheel. I put it all back together and have not had a problem since August. I have no idea why the gasket should have to be replaced if the water does not overflow as it is draining properly.
#20 of 42
Re: 2001 Merc water leak [vernes97] by mike41356
Oct 12, 2007 (7:22 am)
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Replying to: vernes97 (Oct 11, 2007 4:39 pm)

Last night I pulled the wipers and plastic cover (everything clean under there), pulled the intake at the right side, which by the way was perfectly clean inside that
housing. I did find the weep hole and make sure was not clogged because I swished the area with the cable tie.
After checking the gasket I've decided it was deformed mainly flattened, so I removed it and applied a thick bead of silicone and tight everything back. I haven't tested out yet, and it's sunny today, so later on today I'll spray some water on that area to see if it made a difference.
Will post result, but still can't understand (as vernes97
mentioned on previous post) if nothing is clogged and water
runs free on that area why water sips thru there and ends up
inside?.
#21 of 42
Re: 2001 Merc water leak [mike41356] by vernes97
Oct 12, 2007 (7:07 pm)
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Replying to: mike41356 (Oct 12, 2007 7:22 am)

I hope yours is fixed. A mechanic at a used car dealer told me that they routinely fix interior carpet leaks by doing just what I did. MY 1996 E350 was doing the same thing last year but was much easier to fix as there was a foot long hose that drained the wiper tray into the inside fender area.It was totally clogged with leaves and stuff. I didn't have to remove anything as the hose was right out there in plain sight and easy to remove.
    One thing I didn't mention about the crown vic is that I drilled a small hole just to the right and of that weep hole after all the water drained out in the plastic tray as insurance. The hole was in the side rather than the base of the tray. My carpet has stayed dry after numerous heavy rains.
    Good luck and best wishes.
#22 of 42
Re: 2001 Merc water leak [vernes97] by mike41356
Oct 16, 2007 (11:54 am)
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Replying to: vernes97 (Oct 12, 2007 7:07 pm)

I've been checking every day for leaks after my fix and so far so good, and it did rain quite a bit this morning.
I still have the carpet to one side to allow more time to dry since it was pretty wet before I worked on it. Hopefully it will stay that way. Thanks for the good advice.

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