• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 V6 Mustang Tech

Water in my sill drains into floorboard

  • Thread starter Thread starter bzaur
  • Start date Start date May 24, 2010
B

bzaur

New Member
May 23, 2010
1
0
0
May 24, 2010
#1
  • May 24, 2010
  • #1
Hey guys, Long time lurker first time poster. Usually I can search and find answers but this one has got me stumped.
I Got a SMALL problem here with my 04 vert. I noticed last week after a big rain storm that my drivers side front and rear floorboards had about an inch of water in them. After looking over my vert top and this forum I figured I would start removing pieces and see if the problem was a clogged drain. well, it one of the holes in front of the rear tire was indeed clogged and thats why water was coming in my rear floor board (see attached image).
Now, as for the front, why would that also be getting so wet? So I pulled off my sill plate and found water in my sill. the sill is welded to the frame and Im sure that water is getting in through the fastener holes that connect the wiring there in the cabin. now, I could probably drill a hole or two under the sill since it will be covered by the cheap plastic ground effects that cover the rear drain holes, but should I even be getting water in my sill? there is no water in the passenger side so I am wondering if this is by design or if water has just rusted through somehow and I have a bigger problem then I thought. The other attached photo is where I can see the water (when the nose is down). If I turn the hose on the top to test, the water will fill up the sill even after I siphon it out. ANY help or ideas on how to properly fix this would be appreciated. Thanks

 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
May 24, 2010
#2
  • May 24, 2010
  • #2
I had a similar problem on my 03. In my case, I could not find any clogged drain holes. Drilling additional holes in the bottom of the sill did not fix the problem either.

What I ended up doing was to re-seal the seam between the floor pan and side sill (from the inside of the car). I used a combination of rubber backed foil tape and seam sealer.

In your case, I think the water is filling up the sill because of the clogged drain. As the water level rises, there is more opertunity for the water to seep in between the floor pan and sill.

If the water is draining now, it is possible that the leak is gone. If not, consider re-sealing the floor pan seam.
 
You must log in or register to reply here.

Similar threads

K
86 GT Water Pump
  • Kade5114
  • May 11, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
101
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 11, 2026
nickyb
M
2001 v6 heater return pipe leak question
  • mnky99
  • Nov 11, 2025
  • SN95 V6 Mustang Tech
Replies
1
Views
256
SN95 V6 Mustang Tech Nov 11, 2025
mnky99
M
D
2006 GT Windshield Cowl install
  • Daddidio
  • Mar 12, 2026
  • 2005 - 2009 Specific Tech
Replies
0
Views
202
2005 - 2009 Specific Tech Mar 12, 2026
Daddidio
D
A
HELP! water leak front floorboards
  • abbiesweet
  • Aug 2, 2024
  • SN95 V6 Mustang Tech
Replies
5
Views
923
SN95 V6 Mustang Tech Aug 2, 2024
Mustang5L5
E
2007 GT Stalls when lights or a/c turned on
  • ejscarfo
  • Jun 22, 2026
  • 2005 - 2009 Specific Tech
Replies
2
Views
140
2005 - 2009 Specific Tech Jun 29, 2026
ejscarfo
E
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 V6 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?