87 mustang leaks

wingzero_ac19x

New Member

Feb 6, 2006

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Mar 9, 2006

#1

• Mar 9, 2006

• #1

My car has a leak running down to the drivers side floorboard from under the dash. It is coming from the left corner back behind the pedals... I know that aint the greatest of explanations, but I was wondering if that sounds like a windshield leak or a rust hole? I dont know if these mustangs are known to leak like that due to one particular thing. Also, the protective coating under the carpet and insulation on the floorboard is cracked and broken due to the water. Is it possible to repair that coating? Thanks for any help...

 

vristang

15 Year Member

Mar 31, 2005

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Seattle

Mar 9, 2006

#2

• Mar 9, 2006

• #2

I think the "protective coating" you mention is just the sound deadening material. It usually is cracked.

I would have to guess that it is a windshield leak, but you will have to get your head under the dash to locate it better. Maybe you can use a hose to help induce the leak condition?

The other possibility is that there is a cap/plug missing from the firewall or floor boards

 

wingzero_ac19x

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Feb 6, 2006

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Mar 9, 2006

#3

• Mar 9, 2006

• #3

Been there...done that.... I looked under there while someone sprayed it with a water hose...I started from the bottom edge of the windshield and worked my way up...sometimes it leaks. sometimes it dont...but when it leaks it comes from the very left corner under the dash and runs down the seem where the kick panel meets the floorboard going behind the pedals.... thanks for the response...

 

vristang

15 Year Member

Mar 31, 2005

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Mar 9, 2006

#4

• Mar 9, 2006

• #4

Sounds pretty weird.

Could it be the door seal?

 

wingzero_ac19x

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Feb 6, 2006

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Mar 9, 2006

#5

• Mar 9, 2006

• #5

nah, not the door seal, I know that is coming down under the dash, and I know that would seem to be a give away of a windshield leak, but I would think it would leak past the trim inside the car too, instead of running down under dash...

 

vristang

15 Year Member

Mar 31, 2005

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Seattle

Mar 9, 2006

#6

• Mar 9, 2006

• #6

You don't have a sun/moonroof do you?

That is about all the ideas I have.

It may be time to pull the windshield trim pieces, and check the integrity of the seal.

 

93PONY

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Mar 11, 2002

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pensylvania

Mar 9, 2006

#7

• Mar 9, 2006

• #7

could be a cowl leak, leaves and whatnot build up in there and and make moisture which makes it rust through. take off your cowl cover and have a look inside.

 

rd

Founding Member

Jan 12, 2000

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Ocean Springs MS

Mar 10, 2006

#8

• Mar 10, 2006

• #8

Best idea is to carefully pull off the cowl vent trim piece and the windshield trim and look.

My 82 had leaks there and then some. When I took it apart for paint, I found rust holes in the windshield attachment area. Clear silicone fixed all of them.

I also had a rust out at the drivers corner of the firewall, behind the stock sealant. Put a piece of tin over that.