Leaking when it rains? and will spray paint work? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70' GMC · 04-07-2008, 05:41 AM

When it rains it leaks under my dash and where my glovebox is. It is like right on the firewall.

Was wanting to sand it and put primer on some dents and a few rust spots. It is for indoor and outdoor with rust curb will it work til I can fix it better????

jeffspower · 04-07-2008, 05:46 AM

There's a welded cowl seam in the corner, both sides of the cab. They are noted for rusting out. A quick fix is to clean them up as best you can, and cover the whole area in & out with silicone or seam sealer. The seam runs under the winshield rubber too- water gets behind the rubber and will rust thru also.

70' GMC · 04-07-2008, 06:02 AM

Quote:

Originally Posted by jeffspower

There's a welded cowl seam in the corner, both sides of the cab. They are noted for rusting out. A quick fix is to clean them up as best you can, and cover the whole area in & out with silicone or seam sealer. The seam runs under the winshield rubber too- water gets behind the rubber and will rust thru also.

Will a body shop fix that???

Is there pictures on here about this?

jeffspower · 04-07-2008, 06:12 AM

Dunno if a body shop will fix it, depends. It's not easy to fix "permanent". I'll get some pics of one that is really bad for ya tomorrow.

ed2552 · 04-07-2008, 06:13 AM

They will fix it if you ask, they may not know about it otherwise

70' GMC · 04-07-2008, 06:35 AM

Is there any body on here that has done this type of work before? with pics.?

jeffspower · 04-07-2008, 08:49 PM

Here's pics

70' GMC · 04-08-2008, 02:49 AM

Quote:

Originally Posted by jeffspower

Here's pics

Mine does not look like that just minor looking rust. Is there any replacement panels for this?

I just looked at it it looks like a screw went there or a rubber piece went there.

**special-K** · 04-08-2008, 02:13 PM

Ther`s a replacement panel,but it`s the whole firewall.You don`t see it,so a quick patch will do to keep a truck going.Treat that rust,prime with a good sealing primer,seal with seam seal,prime,and paint.Keep it washed out after that.Put screen in your cowl vent panel(where wipers come through).

70' GMC · 04-08-2008, 06:07 PM

Quote:

Originally Posted by special-K

Ther`s a replacement panel,but it`s the whole firewall.You don`t see it,so a quick patch will do to keep a truck going.Treat that rust,prime with a good sealing primer,seal with seam seal,prime,and paint.Keep it washed out after that.Put screen in your cowl vent panel(where wipers come through).

Can you get the screen at napa or advance or autozone?

Is there any build threads that had this and fixed it?

Earlier today I sanded and used some white spray paint on the bad rusty lookin spots where the door is, and sanded the rockers and put gray primer to try and slow that

rust. I wish, that rust didnt exist because its a pain in the rear end.

PLEASE keep me informed on where to get rid of the leaking

**Palf70Step** · 04-08-2008, 02:37 PM

It could also be leaking through the radio antenna area.

04-07-2008, 05:41 AM	#1
70' GMC HERE.......Somewhere Join Date: Oct 2006 Location: Birmingham AL Posts: 2,488	Leaking when it rains? and will spray paint work? When it rains it leaks under my dash and where my glovebox is. It is like right on the firewall. Was wanting to sand it and put primer on some dents and a few rust spots. It is for indoor and outdoor with rust curb will it work til I can fix it better???? __________________ Current rides: 2013 Hyundai elantra gt DD 1995 camaro my first crush lmao Was: 1970 with a 350 4barrel and 288 horses Classics make it possible!

04-07-2008, 05:46 AM	#2
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: Leaking when it rains? and will spray paint work? There's a welded cowl seam in the corner, both sides of the cab. They are noted for rusting out. A quick fix is to clean them up as best you can, and cover the whole area in & out with silicone or seam sealer. The seam runs under the winshield rubber too- water gets behind the rubber and will rust thru also. __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

04-07-2008, 06:12 AM	#4
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: Leaking when it rains? and will spray paint work? Dunno if a body shop will fix it, depends. It's not easy to fix "permanent". I'll get some pics of one that is really bad for ya tomorrow. __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

04-07-2008, 06:13 AM	#5
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: Leaking when it rains? and will spray paint work? They will fix it if you ask, they may not know about it otherwise __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

04-07-2008, 06:35 AM	#6
70' GMC HERE.......Somewhere Join Date: Oct 2006 Location: Birmingham AL Posts: 2,488	Re: Leaking when it rains? and will spray paint work? Is there any body on here that has done this type of work before? with pics.? __________________ Current rides: 2013 Hyundai elantra gt DD 1995 camaro my first crush lmao Was: 1970 with a 350 4barrel and 288 horses Classics make it possible!

04-07-2008, 08:49 PM	#7
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: Leaking when it rains? and will spray paint work? Here's pics Attached Images __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

04-08-2008, 02:13 PM	#9
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Leaking when it rains? and will spray paint work? Ther`s a replacement panel,but it`s the whole firewall.You don`t see it,so a quick patch will do to keep a truck going.Treat that rust,prime with a good sealing primer,seal with seam seal,prime,and paint.Keep it washed out after that.Put screen in your cowl vent panel(where wipers come through). __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 04-08-2008 at 02:13 PM.

04-08-2008, 02:37 PM	#11
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: Leaking when it rains? and will spray paint work? It could also be leaking through the radio antenna area. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

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