water leaking inside passenger floor? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*gmachinz* · 11-04-2012, 05:01 AM

So after taking apart the AC firewall box to reseal it, I think I discovered how the water was getting in-there is a seam/lip just above the blower motor where water trickles down from the hinge area and rests/collects under the heater core hoses. When I took the AC enclosure off, I noticed the foam gasket that seals the inlet/outlets on the heater core had not only "shrunk", but there was a gap allowing water to get into the cab area. I am wondering if this was the water issue that would trickle inside from time to time? The area was damp and kinda dirty-grimey too. I did find a good foam seal at the boneyard and I siliconed it around the heater core slightly also just to make sure. Anybody else have that kind of issue? I should mention the entire seal around the enclosure was suspect also.....dryrotted and cracked.
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burb1085 · 11-04-2012, 07:30 AM

http://forum.73-87chevytrucks.com/sm...c,22630.0.html Heres a link to a thread I found about it.

burb1085 · 11-04-2012, 07:34 AM

Sorry, you have a/c. Idon't think this applies.

Square_78 · 11-04-2012, 07:39 AM

Also drip rails, cowl seams and antenna hole will let water in...

Square_78 · 11-04-2012, 07:40 AM

Sorry I thought i was on the 67-72 section! haha... those things might still apply though to the 73-87's.

**old Rusty C10** · 11-04-2012, 08:19 AM

on the 73-87 the non ac cabs have issues with the under dash vents leaking on the lower kick panels and the door seals allow water in

1978chevybigten · 11-10-2012, 07:15 PM

Did you check the seal on you passenger side kick panel? That's where mine was leaking.
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*gmachinz* · 11-10-2012, 07:28 PM

You know.....there is a goofy little rust spot that's kinda scabby where the kick panel meets the firewall....not sure where that comes from tho....does the water travel along the hinge on the cowl and trickle down?
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1978chevybigten · 11-10-2012, 07:36 PM

Yup. You can buy the seal from lmc for about $8.00
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11-04-2012, 05:01 AM	#1
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	water leaking inside passenger floor? So after taking apart the AC firewall box to reseal it, I think I discovered how the water was getting in-there is a seam/lip just above the blower motor where water trickles down from the hinge area and rests/collects under the heater core hoses. When I took the AC enclosure off, I noticed the foam gasket that seals the inlet/outlets on the heater core had not only "shrunk", but there was a gap allowing water to get into the cab area. I am wondering if this was the water issue that would trickle inside from time to time? The area was damp and kinda dirty-grimey too. I did find a good foam seal at the boneyard and I siliconed it around the heater core slightly also just to make sure. Anybody else have that kind of issue? I should mention the entire seal around the enclosure was suspect also.....dryrotted and cracked. Posted via Mobile Device

11-04-2012, 07:30 AM	#2
burb1085 Registered User Join Date: Mar 2011 Location: Lancaster,Oh. Posts: 138	Re: water leaking inside passenger floor? http://forum.73-87chevytrucks.com/sm...c,22630.0.html Heres a link to a thread I found about it.

11-04-2012, 07:34 AM	#3
burb1085 Registered User Join Date: Mar 2011 Location: Lancaster,Oh. Posts: 138	Re: water leaking inside passenger floor? Sorry, you have a/c. Idon't think this applies.

11-04-2012, 07:39 AM	#4
Square_78 Registered User Join Date: Mar 2012 Location: Okanagan Valley, BC, Canada Posts: 1,237	Re: water leaking inside passenger floor? Also drip rails, cowl seams and antenna hole will let water in... __________________ #teamlongbed "I refuse to go disc brakes. I actually love drum brakes. It makes for an adventure." - 50bomb 1978 Chevy shop truck - static 6/8" 1970 GMC 1500 - Accuair eLevel Resto-mod http://67-72chevytrucks.com/vboard/s...d.php?t=537497

11-04-2012, 07:40 AM	#5
Square_78 Registered User Join Date: Mar 2012 Location: Okanagan Valley, BC, Canada Posts: 1,237	Re: water leaking inside passenger floor? Sorry I thought i was on the 67-72 section! haha... those things might still apply though to the 73-87's. __________________ #teamlongbed "I refuse to go disc brakes. I actually love drum brakes. It makes for an adventure." - 50bomb 1978 Chevy shop truck - static 6/8" 1970 GMC 1500 - Accuair eLevel Resto-mod http://67-72chevytrucks.com/vboard/s...d.php?t=537497

11-04-2012, 08:19 AM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: water leaking inside passenger floor? on the 73-87 the non ac cabs have issues with the under dash vents leaking on the lower kick panels and the door seals allow water in __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

11-10-2012, 07:15 PM	#7
1978chevybigten Registered User Join Date: Jun 2012 Location: dfw Posts: 183	Re: water leaking inside passenger floor? Did you check the seal on you passenger side kick panel? That's where mine was leaking. Posted via Mobile Device __________________ 1978 big ten 350/350:chevy

11-10-2012, 07:28 PM	#8
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: water leaking inside passenger floor? You know.....there is a goofy little rust spot that's kinda scabby where the kick panel meets the firewall....not sure where that comes from tho....does the water travel along the hinge on the cowl and trickle down? Posted via Mobile Device

11-10-2012, 07:36 PM	#9
1978chevybigten Registered User Join Date: Jun 2012 Location: dfw Posts: 183	Re: water leaking inside passenger floor? Yup. You can buy the seal from lmc for about $8.00 Posted via Mobile Device __________________ 1978 big ten 350/350:chevy



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