47-55.1 Cowl vent drain hose? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chopped53 · 09-09-2019, 06:31 PM

Just getting ready to take the maiden voyage in my truck and I'm finalizing a few minor details. Did a search on this and nothing came up so I thought I'd ask: The top cowl vent on my AD has a drain that exits right above all the new wiring under my dash (without the hose). So I bought an aftermarket replacement hose. Now it exits through the firewall right above the distributor on my SBC, which is worse. I could extend the hose down past the distributor, but that might look a bit goofy. I was hoping one of you guys might have a slick solution.

My cowl vent has one of those foam gaskets in it, so maybe water won't even get into that drain. Thoughts?

mr48chev · 09-09-2019, 06:45 PM

Yep, Lots of us who have had one of these trucks have fought that battle.
r
What I intend to do on mine "this time" is to run a tube down the inside of the firewall to the right of the indent to the foot board and make a hole there so that it exits below the floor much like the drain tube on an AC unit. With a short piece of hose from the vent drain tube to that tube I should be good.

MARTINSR · 09-09-2019, 06:47 PM

Quote:

Originally Posted by mr48chev

Yep, Lots of us who have had one of these trucks have fought that battle.
r
What I intend to do on mine "this time" is to run a tube down the inside of the firewall to the right of the indent to the foot board and make a hole there so that it exits below the floor much like the drain tube on an AC unit. With a short piece of hose from the vent drain tube to that tube I should be good.

YEp, that's my plan too.

Brian

Chopped53 · 09-10-2019, 09:54 AM

Thank you gentlemen.

**youngrodder** · 09-10-2019, 10:12 AM

I welded my fire wall hole closed and rand the drain house on the inside of the firewall. I added a T to the hose and connected my drain from my AC system to drain out of the same hose.. I never liked the look of the factory drain hose sticking out of the fire wall.

1948ChevyDumpFixer · 09-10-2019, 09:24 PM

I just did this repair last week. I'm not crazy about the hose exiting onto the valve cover, I'm guessing it could get into the cover/ oil?

The original hose was split under the dash (for who knows how long) and likely caused a lot of my dash/ floor rust issues.

nvrdone · 09-10-2019, 10:44 PM

just don't drive in the rain & you should be good !!!

vintovka · 09-11-2019, 05:44 PM

Longer hose does the trick. Pun intended.

09-09-2019, 06:31 PM	#1
Chopped53 Registered User Join Date: Jul 2019 Location: Calgary, Alberta Posts: 80	Cowl vent drain hose? Just getting ready to take the maiden voyage in my truck and I'm finalizing a few minor details. Did a search on this and nothing came up so I thought I'd ask: The top cowl vent on my AD has a drain that exits right above all the new wiring under my dash (without the hose). So I bought an aftermarket replacement hose. Now it exits through the firewall right above the distributor on my SBC, which is worse. I could extend the hose down past the distributor, but that might look a bit goofy. I was hoping one of you guys might have a slick solution. My cowl vent has one of those foam gaskets in it, so maybe water won't even get into that drain. Thoughts?

09-09-2019, 06:45 PM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,402	Re: Cowl vent drain hose? Yep, Lots of us who have had one of these trucks have fought that battle. r What I intend to do on mine "this time" is to run a tube down the inside of the firewall to the right of the indent to the foot board and make a hole there so that it exits below the floor much like the drain tube on an AC unit. With a short piece of hose from the vent drain tube to that tube I should be good. __________________ 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.

09-10-2019, 09:54 AM	#4
Chopped53 Registered User Join Date: Jul 2019 Location: Calgary, Alberta Posts: 80	Re: Cowl vent drain hose? Thank you gentlemen.

09-10-2019, 10:12 AM	#5
youngrodder Registered User Join Date: Mar 2007 Location: Scotts, Michigan Posts: 3,765	Re: Cowl vent drain hose? I welded my fire wall hole closed and rand the drain house on the inside of the firewall. I added a T to the hose and connected my drain from my AC system to drain out of the same hose.. I never liked the look of the factory drain hose sticking out of the fire wall. __________________ …………...........__________ .................. ((__\|__\|\|___\____ ..;.;;.:;:;.,;..;((_(O))____ (_(O)) 1948 Chevy Truck - Finished SOLD!! 1953 Chevy Suburban "Family Truckster" Completed: Spring of 2021 http://67-72chevytrucks.com/vboard/s...d.php?t=605484 1994 4x4 Blazer - "Field Find" https://67-72chevytrucks.com/vboard/...ferrerid=30857

09-10-2019, 09:24 PM	#6
1948ChevyDumpFixer Registered User Join Date: Aug 2019 Location: NC Posts: 30	Re: Cowl vent drain hose? I just did this repair last week. I'm not crazy about the hose exiting onto the valve cover, I'm guessing it could get into the cover/ oil? The original hose was split under the dash (for who knows how long) and likely caused a lot of my dash/ floor rust issues.

09-10-2019, 10:44 PM	#7
nvrdone Registered User Join Date: Dec 2011 Location: Moxee WA Posts: 1,442	Re: Cowl vent drain hose? just don't drive in the rain & you should be good !!!

09-11-2019, 05:44 PM	#8
vintovka Registered User Join Date: Aug 2016 Location: Hunkered Down Posts: 1,801	Re: Cowl vent drain hose? Longer hose does the trick. Pun intended. __________________ 1954 USAF 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=714917



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