How to fix leaking firewall/footwell?: '84 p/u

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How to fix leaking firewall/footwell?: '84 p/u #840061 10/06/07 04:28 AM

Joined: Jan 2002

Posts: 1,617

S.E. Wisconsin

matts

Body Damage is Cool

I've got that leaking that trucks of this body style get on the firewall that leaves the footwells damp. I've had the fender's and the header panel at the base of the windshield off before and all I remember is that there is a standing body seam where the inner wheel well meets firewall, but I don't remember if the full length of it is accessable. It seems like the leak starts pretty high (up close to the base of the windshield). Is the fixable? -- Matt

'89 4runner SR5, 3.0, auto (fun)
'93 xtra cab, dlx,3.0, 5spd (work truck)

Re: How to fix leaking firewall/footwell?: '84 p/u [Re: matts] #840062 10/06/07 04:38 AM

Joined: Jul 2002

Posts: 1,674

Placerville, CA

stock87

Body Damage is Cool

Not sure about yours, but that's not where mine was leaking from. Take out either kick panel, and look straight up (like above where the ECU is/would be). The seam there (it's at the bottom of the whole cabin air intake cowl is) is what started leaking on mine. I couldnt really get to it from above so I snaked my arm up there with some silicone on my finger and smeared it on the join. Dry so far *fingers crossed*

My Truck: 1987 XtraCab DLX 22R 4WD 5 Speed Manual
--------------------
"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." -Jeremy Clarkson

Re: How to fix leaking firewall/footwell?: '84 p/u [Re: stock87] #840063 10/08/07 04:00 AM

Joined: Jan 2002

Posts: 1,617

S.E. Wisconsin

matts

Body Damage is Cool

Quote

...The seam there (it's at the bottom of the whole cabin air intake cowl is) is what started leaking on mine. I couldnt really get to it from above so I snaked my arm up there with some silicone on my finger and smeared it on the join. Dry so far *fingers crossed*

Yes, I think that seam may be enclosed from above inside the cowl. Hard to see how to fix that without taking the whole spot welded structure apart. In any case I've seen the spot your talking about. Anybody here in the rust belt has that problem if their truck or 4runner has seen a half dozen winters or so. -- Matt

'89 4runner SR5, 3.0, auto (fun)
'93 xtra cab, dlx,3.0, 5spd (work truck)

Re: How to fix leaking firewall/footwell?: '84 p/u [Re: matts] #840064 10/08/07 04:49 AM

Joined: Oct 2002

Posts: 153

Cedar Park, Texas

Frank Torres Offline

Wheeler

Yes I had a leak at the windshield, it was repaired with RTV years ago, that effected the ECU and dripped on the floorboard.

And a recent leak, I drove through some street flooding, 6" of water going about 20mph. Water was forcefully spraying everywhere, entering the cab through the passenger fender firewall area and shorted out the Open Circuit Relay, the relay that runs the fuel pump. <img src="/forums/images/graemlins/scared.gif" alt="" />

Protect your vitals, fix those leaks, RTV works good.

1991 FJ 80 Land Cruiser for fun.
1998 GS300 for the wife
1998 GS400 for me
1991 Supra SOLD
1986 4Runner 335k miles-22re EB inside.SOLD

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