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Mercury Grand Marquis Water Leaks

48 messages,  Last post on Apr 09, 2013 at 10:11 AM

You are in the Ford Crown Victoria/Mercury Grand Marquis Forum.

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

Messages Page 5 of 5

#39 of 48 Re: Reply to Merc water leak [cobrass] by ralka

Nov 01, 2008 (5:40 pm)

Replying to: cobrass (Oct 22, 2008 6:25 pm)
pull the carpet back on the right front floor and run water over the windshield. than look to see if water is coming out of the bottom of the hvac or to the side of the case, or from higher

#40 of 48 Re: Reply to Merc water leak [vernes97] by cougar6999

Jan 12, 2009 (6:08 pm)

Replying to: vernes97 (Oct 27, 2007 1:31 pm)
I have a 97 Crown vic that leaks on both sides. I performed the seal the hell out of the fresh air intake and had no luck.
 
I pulled out the carpet and loosened the sound deadner on the firewall and had the wife start running the hose. I found the leak on the drivers side was coming from the grommet on the hood release cable that passes thru the firewall. It was cracked.
 
The passenger side was the grommet on the round bundle of wires that runs thru the firewall right under the heater box. The grommet is the larger one, about 1.5 - 2 inches in diameter and has a bunch of wires going thru it. It looks like it either shrunk or it wasn't spec'd right from the factory. What a pain to find. Hope this help some folks. Good luck.

#41 of 48 Re: Reply to Merc water leak [cougar6999] by felhet

Apr 08, 2009 (3:27 pm)

Replying to: cougar6999 (Jan 12, 2009 6:08 pm)
I never had a problem with my 96 until I moved to Texas and experienced the torrential rains there.
 
I read the posts on this site and decided to investigate myself. I used to have PUDDLES on both driver and passenger sides in the front and back.
 
I ended up removing the plastic cowl cover under the windshield and then the wiper tray which holds the wiper motor and the wiper mechanism. You have to take off the wiper arms themselves to do this.
 
The wiper tray has channels for water to run and in the middle there is a plastic/rubber flap for the water to collect and drip down a "chute" down the middle of the engine bay and firewall. My wiper tray was COMPLETELY clogged with dirt and leaves at the mouth of the rubber flap. I vacuumed all the dirt out and cleaned all the little crevices and replaced the wiper tray.
 
I also siliconed the heck out of the fresh air intake on the passenger side since the gasket shrunk like everyone else. And I siliconed the heck out of the cables going through the driver's side firewall.
 
So far I have had NO problems. I did all this 8 months ago and we have had some hard rains since then.
 
Hope this information helps. Let me know if there are any questions.

#42 of 48 2003 Mercury Grand Marquis water leak by cathiew

Jul 21, 2009 (9:12 am)

I have a water leak - passenger side - not coming from windshield, no debris clogging cowl; not coming from heater fan motor; dealer says leak is a common problem most likely coming from windshield wiper motor cowl and can repair for $400 -$500. Any ideas where else it could be coming from?

#43 of 48 96 Crown Victoria water leak by afret

Jan 24, 2010 (11:13 am)

My wife & I inhereted the 96 Crown Vic from her parent's estate....found that we have a water leak. Only on the passenger side--but BOTH front and back floor boards are wet after a hard rain. I read about 5 pages of posts on this discussion...but, haven't seen comments about both front and rear floor boards becoming wet. If the water is coming in through the firewall (as it seems with most of these posts)...how can the rear floor board become wet?
 
BTW....took the car to the local Ford dealership. Lets just say they found nothing and had only wags at the potential problem.

#44 of 48 Re: 96 Crown Victoria water leak [afret] by afret

Mar 13, 2010 (8:36 am)

Replying to: afret (Jan 24, 2010 11:13 am)
Took it to the dealership (again) to give them more time to troubleshoot. They found the problem...they said it was a hardened door seal (NOT--notice my sarcasm). A friend suggested an auto body shop as they deal with things like this on a regular basis. So I did...they called within a couple of hours and said that they wiper tray drainage seal was bad. $125 later...and numerous rains, it's dry!

#45 of 48 2006 Grand Marque by jar1924

Nov 20, 2011 (10:03 am)

My 2006 Grand Marque leaks rain a lot of water on the right rear passenger side.

#46 of 48 Re: water leak passenger side rear floor [2006gm] by jar1924

Nov 20, 2011 (7:08 pm)

Replying to: 2006gm (Jan 18, 2007 8:00 am)
Does anyone know of a fix for this problem.

#47 of 48 Re: 2001 Merc water leak [mtnman1938] by sorrymodelyr08

Jun 27, 2012 (10:56 pm)

Replying to: mtnman1938 (Jul 15, 2007 9:08 pm)
I purchased 2008 , used, from dealeship-the dr door was maladjusted-rubber sealant on windshield-front cowl maladjusted --Dealer said nothing was wrong with car at sale..--whenever I use wipers and washer the cabin fill with fumes from washer fluid. Also ac never gets cool on 80 degree days with 3 people inside. 2nd dealership charged me about 800$- they readjusted dr door and trunk lid--watered down washer fluid so as not to have a scent--completly ignored me when i suggested washer fumes leaking into cabin and lack of ac cooling was the same problem--lack of sealing. Also --when stopped behind idling cars -there exhaust is overwhelming.. also-the windshield fogs up on most rainy days. I do not use washer when cleaning windshield because of obnoxious fumes leaking inside. I must handwash/clean. Service-depts really are not astute to troubleshoot and fix-- A good dashboard/firewall tech could easily detect and fix this issue. I am sure there is at least one service dept with one qualified service rep in the Wash.,,DC area. I will continue on to a third service dept --just maybe I will luck up and have this one thing fixed and resolve all the above issues. I hope this letter helps you to refine and define your issues with water leaks or any leaks that brings in fumes- leaks ac air cooling, winter time heating not warm enough, foggy windows. thanks for reading id: sorrymodelyr08

#48 of 48 Re: Reply to Merc water leak [cobrass] by faxjax

Apr 09, 2013 (10:11 am)

Replying to: cobrass (Oct 22, 2008 6:25 pm)
I too had the infamous water leak on the passenger side.
The passenger side wheel well needed removed then I could see the 1 bolt and nut that allowed water to run back in the cabin. The bolt was just under the Heater box assembly. Just put a silicone around it, and around the rubber flapper hole in the firewall. No more leak.
 
Thanks to all that posted their scenerios This helped track down my issue.

Messages Page 5 of 5

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