Water getting into my cab and rusting floor! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mrtn15 · 12-01-2010, 09:16 PM

I have no clue why this is happening..

I can pour water into my cowl before my windshield, and water leaks into my cab.. its about midway down between the floor, and bottom of windshield. Why is this ? Is there a seal I can buy, or is there a serious problem ? 86 Silverado 350\350 2 Wheel, SWB.

mooseknuckles · 12-01-2010, 09:27 PM

mine leaks water on the floor too...I know it's a problem with these trucks. prob a hole rusted some where.

notrailerqueens · 12-01-2010, 09:29 PM

your cowl is rusted out. i have the same problem. if you pull the cowl filler piece off and look down in ther you will see that its rusted out. you can buy the replacement pannel to fix it i believe lmc offers them. its a pretty common problem.

flamingbig10 · 12-01-2010, 09:56 PM

mine leaked like crazy so I closed the cowl up on the cab with HVAC aluminum tape no more puddles

Mrtn15 · 12-02-2010, 01:12 AM

Whoa, I don't know how to take it off. and I also Don't know how to get down in there. And do you suppose JB Weld ?

uncleben78 · 12-02-2010, 01:18 AM

bump.

benoit454 · 12-02-2010, 01:25 AM

lmc has cowls now? I didn't know that. I know they got the screens and ones with bolts or clips, and then the lower cowls which is the lower firewall on the outside.

D-Day · 12-02-2010, 11:57 AM

Do you have cab lights? That was the source of my leak. Some silicone around the base(s) and around the cracks and that ended it.

Altec · 12-02-2010, 12:19 PM

Quote:

Originally Posted by notrailerqueens

your cowl is rusted out. i have the same problem. if you pull the cowl filler piece off and look down in ther you will see that its rusted out. you can buy the replacement pannel to fix it i believe lmc offers them. its a pretty common problem.

My first thought. Mine had leaves stuck in it and caused it to rust. I lucked out that it rusted the other way into the engine bay.

To get the cowl piece off you pull the wind shield wipers, and you'll find a few bolts holding the cowl on. After that is a plastic vent piece which also unbolts. Then you'll be able to see down in there. Clean out any gunk, and look for rust. Even if it turns out that isn't the problem, it doesn't hurt to clean it. Would have kept mine from having a new vent for the engine...

Mrtn15 · 12-02-2010, 02:06 PM

wow thanks guys! I got it sealed up with some Jb weld!

Mrtn15 · 12-02-2010, 02:07 PM

Quote:

Originally Posted by D-Day

Do you have cab lights? That was the source of my leak. Some silicone around the base(s) and around the cracks and that ended it.

I dont have Those lights, but thanks ! I siliconed inside my cowl and fixed it !

Mrtn15 · 12-02-2010, 02:08 PM

Quote:

Originally Posted by Altec

My first thought. Mine had leaves stuck in it and caused it to rust. I lucked out that it rusted the other way into the engine bay.

To get the cowl piece off you pull the wind shield wipers, and you'll find a few bolts holding the cowl on. After that is a plastic vent piece which also unbolts. Then you'll be able to see down in there. Clean out any gunk, and look for rust. Even if it turns out that isn't the problem, it doesn't hurt to clean it. Would have kept mine from having a new vent for the engine...

Thanks man! this helped me a lottt. !!

**Captkaos** · 12-02-2010, 06:45 PM

Wrote this tech article for just this situation.

http://forum.73-87chevytrucks.com/sm...?topic=12521.0

12-01-2010, 09:16 PM	#1
Mrtn15 Registered User Join Date: Oct 2010 Location: Edgewood Texas Posts: 272	Water getting into my cab and rusting floor! I have no clue why this is happening.. I can pour water into my cowl before my windshield, and water leaks into my cab.. its about midway down between the floor, and bottom of windshield. Why is this ? Is there a seal I can buy, or is there a serious problem ? 86 Silverado 350\350 2 Wheel, SWB.

12-01-2010, 09:27 PM	#2
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: Water getting into my cab and rusting floor! mine leaks water on the floor too...I know it's a problem with these trucks. prob a hole rusted some where.

12-01-2010, 09:29 PM	#3
notrailerqueens Registered User Join Date: Oct 2010 Location: Spring, TX Posts: 233	Re: Water getting into my cab and rusting floor! your cowl is rusted out. i have the same problem. if you pull the cowl filler piece off and look down in ther you will see that its rusted out. you can buy the replacement pannel to fix it i believe lmc offers them. its a pretty common problem. __________________ Lindsey Rae 85' chevy long box, built by a girl! My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=429956

12-01-2010, 09:56 PM	#4
flamingbig10 6.0 powered square Join Date: Feb 2008 Location: Mesquite texas Posts: 3,459	Re: Water getting into my cab and rusting floor! mine leaked like crazy so I closed the cowl up on the cab with HVAC aluminum tape no more puddles __________________ Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326

12-02-2010, 01:12 AM	#5
Mrtn15 Registered User Join Date: Oct 2010 Location: Edgewood Texas Posts: 272	Re: Water getting into my cab and rusting floor! Whoa, I don't know how to take it off. and I also Don't know how to get down in there. And do you suppose JB Weld ?

12-02-2010, 01:18 AM	#6
uncleben78 Registered User Join Date: Jan 2010 Location: Duvall, WA Posts: 8	Re: Water getting into my cab and rusting floor! bump.

12-02-2010, 01:25 AM	#7
benoit454 Chris Join Date: Nov 2004 Location: Monaville, WV Posts: 3,737	Re: Water getting into my cab and rusting floor! lmc has cowls now? I didn't know that. I know they got the screens and ones with bolts or clips, and then the lower cowls which is the lower firewall on the outside. __________________ Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454

12-02-2010, 11:57 AM	#8
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Re: Water getting into my cab and rusting floor! Do you have cab lights? That was the source of my leak. Some silicone around the base(s) and around the cracks and that ended it.

12-02-2010, 02:06 PM	#10
Mrtn15 Registered User Join Date: Oct 2010 Location: Edgewood Texas Posts: 272	Re: Water getting into my cab and rusting floor! wow thanks guys! I got it sealed up with some Jb weld!

12-02-2010, 06:45 PM	#13
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Water getting into my cab and rusting floor! Wrote this tech article for just this situation. http://forum.73-87chevytrucks.com/sm...?topic=12521.0 __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.