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Old 05-26-2008, 03:22 AM   #3
pilotj
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Join Date: May 2007
Location: Roanoke, VA
Posts: 78
Re: Water in passenger floorboard--help.

I had a similar problem on my 79 pu(water in passenger side floorboard). I thought is was my winshield leaking, so I replaced the gasket. Still leaked. Finally found out it was leaking where the firewall is joined with the cab. I happened to be be cleaning the cowl vent area with a water hose and noticed the water had leaked in from the cowl vent(fresh air intake). I pumped a tube of clear caulk into the body/cowl seam and it hasnt leaked since.
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1979 Chevy C20 350/TH400
1974 Chevy C30 350/4speed
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