47-55.1 Slick off the cowl vent - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**8man** · 04-06-2020, 05:36 PM

I've read that you need to cut out the old cowl vent and then butt weld in the patch so it won't show through the paint. I've also heard to just use the old vent top plate and weld it in.

What is the right way to do this?

Thanks.

crossfire84 · 04-06-2020, 06:10 PM

I purchased an oversized vent cover to weld in.

**mongocanfly** · 04-06-2020, 07:33 PM

If you reuse the old vent cover then your gonna have a big gap to fill, not to mention the radius edges...would be better off making a oversized patch and butt weld it in..like crossfire said

**mr48chev** · 04-06-2020, 08:47 PM

I'd at least buy the panel that they sell to fill it with rather than try to weld in the vent. I have to agree that finishing it off so it didn't show would be pretty hard. Probably the best way would be to cut the area around the vent out and make a patch that can be butt welded in just as you would butt weld in any other filler patch in. A section cut out of donor panel from an AD truck might be best rather than one cut from a piece of new sheet metal. Most of us have a throw away door hood or some other piece around that we could cut a patch out of and have the same thickness and alloy makeup of the cowl panel .

MiraclePieCo · 04-08-2020, 08:49 PM

A previous owner filled mine. Can't see it from outside at all - and I have a pretty trained eye.

**8man** · 04-09-2020, 09:01 AM

Thanks guys. I ordered one today. Will let you all know how it turns out.

04-06-2020, 05:36 PM	#1
8man Senior Member Join Date: Sep 2017 Location: Bryan, Texas Posts: 2,380	Slick off the cowl vent I've read that you need to cut out the old cowl vent and then butt weld in the patch so it won't show through the paint. I've also heard to just use the old vent top plate and weld it in. What is the right way to do this? Thanks. __________________ 8man-aka Robert 1948 on a S10 Frame, small block with a carb 1954 Cab, 53 Front and Bed, 50 Doors, S10 Frame, Power TBD Build thread: "]http://67-72chevytrucks.com/vboard/showthread.php?t=746899&highlight=wife%27s+48[/URL] [/URL]http://67-72chevytrucks.com/vboard/showthread.php?t=840204

04-06-2020, 06:10 PM	#2
crossfire84 Registered User Join Date: Jun 2012 Location: wind lake WI Posts: 1,751	Re: Slick off the cowl vent I purchased an oversized vent cover to weld in. __________________ LIL ERV the 50-3600 396 BBC stroked to 415 cid Richmond 6spd over drive C4 rear Porter built a arms Never give the Devil a ride,because he'll want to Drive!

04-06-2020, 07:33 PM	#3
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,671	Re: Slick off the cowl vent If you reuse the old vent cover then your gonna have a big gap to fill, not to mention the radius edges...would be better off making a oversized patch and butt weld it in..like crossfire said __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

04-06-2020, 08:47 PM	#4
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,711	Re: Slick off the cowl vent I'd at least buy the panel that they sell to fill it with rather than try to weld in the vent. I have to agree that finishing it off so it didn't show would be pretty hard. Probably the best way would be to cut the area around the vent out and make a patch that can be butt welded in just as you would butt weld in any other filler patch in. A section cut out of donor panel from an AD truck might be best rather than one cut from a piece of new sheet metal. Most of us have a throw away door hood or some other piece around that we could cut a patch out of and have the same thickness and alloy makeup of the cowl panel . __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

04-08-2020, 08:49 PM	#5
MiraclePieCo Registered User Join Date: Sep 2014 Location: USA Posts: 2,249	Re: Slick off the cowl vent A previous owner filled mine. Can't see it from outside at all - and I have a pretty trained eye. __________________ 1951 Chevy Panel Truck

04-09-2020, 09:01 AM	#6
8man Senior Member Join Date: Sep 2017 Location: Bryan, Texas Posts: 2,380	Re: Slick off the cowl vent Thanks guys. I ordered one today. Will let you all know how it turns out. __________________ 8man-aka Robert 1948 on a S10 Frame, small block with a carb 1954 Cab, 53 Front and Bed, 50 Doors, S10 Frame, Power TBD Build thread: "]http://67-72chevytrucks.com/vboard/showthread.php?t=746899&highlight=wife%27s+48[/URL] [/URL]http://67-72chevytrucks.com/vboard/showthread.php?t=840204



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