A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jocko** · 04-05-2014, 08:39 PM

Pls see Item 15 on here: http://www.lmctruck.com/icatalog/cb/full.aspx?Page=65

It's an a/c center vent plug kit. Note that it only plugs part of the system - i.e. eliminates somewhat redundant hoses and routing. Looks like a good idea to me - anyone done this?

Space is at a premium down there - having only a single hose running from the center vent diverter to the center vent seems to make more sense to me.

Thoughts?
Thx, jocko

**Already Gone** · 04-05-2014, 08:59 PM

Looks like a good idea to me.

Andy4639 · 04-05-2014, 10:59 PM

I made my own and it seems to blow out harder. It's been this way close to 20 years now I guess. I took a plastic cap and plugged it off then taped it.

JimKshortstep4x4 · 04-06-2014, 08:28 AM

I used a rubber sheet and hose clamped it over the left side connector. It increases the air flow toward the driver some but it makes putting the hoses in place easier.

Jim

jondancer · 04-06-2014, 08:30 AM

I bought those exact ones and used them. They work fine but you can make your own, they are almost like PVC end caps

Katrina/10 · 04-06-2014, 08:32 AM

I saw that in the catalog, too. So I went to the hardware store and found some plastic caps, and covered the extra holes. I had always wondered why the factory had put two hoses on one vent, and when I turned on the blower, I found out why. By feeding the vent from only one side or the other, the air is forced into the cab at an angle. The air flow goes only to the driver or passenger, depending on which side you blocked. I would have gone back in and put two hoses on it if it wasn't so much trouble.

Elefuntman · 04-07-2014, 01:58 PM

Quote:

Originally Posted by Katrina/10

I saw that in the catalog, too. So I went to the hardware store and found some plastic caps, and covered the extra holes. I had always wondered why the factory had put two hoses on one vent, and when I turned on the blower, I found out why. By feeding the vent from only one side or the other, the air is forced into the cab at an angle. The air flow goes only to the driver or passenger, depending on which side you blocked. I would have gone back in and put two hoses on it if it wasn't so much trouble.

ditto, did the same thing a while ago as my hose was broke. Diverted most of the air on the driver

Space under the dash is a premium on these trucks with factory air, if there was more room, I would put it back on.

**yote1234** · 04-07-2014, 02:05 PM

Quote:

Originally Posted by Katrina/10

I saw that in the catalog, too. So I went to the hardware store and found some plastic caps, and covered the extra holes. I had always wondered why the factory had put two hoses on one vent, and when I turned on the blower, I found out why. By feeding the vent from only one side or the other, the air is forced into the cab at an angle. The air flow goes only to the driver or passenger, depending on which side you blocked. I would have gone back in and put two hoses on it if it wasn't so much trouble.

x2.. i did this to an old truck i had, never again,

**leddzepp** · 04-07-2014, 02:07 PM

I bought a rubber pipe cap from Home Depot and did the same thing. Much more air volume now. Doesn't matter to me where the air is diverted, the cab is so small it cools off quickly anyways.

Lee H · 04-07-2014, 02:25 PM

Quote:

Originally Posted by leddzepp

I bought a rubber pipe cap from Home Depot and did the same thing. Much more air volume now. Doesn't matter to me where the air is diverted, the cab is so small it cools off quickly anyways.

Yup, same here. Wish I would have blocked the passengers side so the AC was not blowing directly on me.

Katrina/10 · 04-08-2014, 09:50 AM

I put the cap on the driver side inlet, with the hose connected to the passenger side inlet, most of the air blows on the driver. I don't think this would be too much of a problem if you live in an area that is really hot. I realized that I have no center seat belt, so not likely to have a middle passenger either.

04-05-2014, 08:39 PM	#1
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,975	A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? Pls see Item 15 on here: http://www.lmctruck.com/icatalog/cb/full.aspx?Page=65 It's an a/c center vent plug kit. Note that it only plugs part of the system - i.e. eliminates somewhat redundant hoses and routing. Looks like a good idea to me - anyone done this? Space is at a premium down there - having only a single hose running from the center vent diverter to the center vent seems to make more sense to me. Thoughts? Thx, jocko Last edited by jocko; 04-05-2014 at 10:26 PM.

04-05-2014, 08:59 PM	#2
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,143	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? Looks like a good idea to me. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

04-05-2014, 10:59 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? I made my own and it seems to blow out harder. It's been this way close to 20 years now I guess. I took a plastic cap and plugged it off then taped it. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

04-06-2014, 08:28 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? I used a rubber sheet and hose clamped it over the left side connector. It increases the air flow toward the driver some but it makes putting the hoses in place easier. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

04-06-2014, 08:30 AM	#5
jondancer Registered User Join Date: Jul 2010 Location: central michigan Posts: 1,194	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? I bought those exact ones and used them. They work fine but you can make your own, they are almost like PVC end caps

04-06-2014, 08:32 AM	#6
Katrina/10 Registered User Join Date: Oct 2010 Location: Ocean Springs, MS Posts: 1,746	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? I saw that in the catalog, too. So I went to the hardware store and found some plastic caps, and covered the extra holes. I had always wondered why the factory had put two hoses on one vent, and when I turned on the blower, I found out why. By feeding the vent from only one side or the other, the air is forced into the cab at an angle. The air flow goes only to the driver or passenger, depending on which side you blocked. I would have gone back in and put two hoses on it if it wasn't so much trouble. __________________ Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100

04-07-2014, 02:07 PM	#9
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,033	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? I bought a rubber pipe cap from Home Depot and did the same thing. Much more air volume now. Doesn't matter to me where the air is diverted, the cab is so small it cools off quickly anyways. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

04-08-2014, 09:50 AM	#11
Katrina/10 Registered User Join Date: Oct 2010 Location: Ocean Springs, MS Posts: 1,746	Re: A/C Center Vent Plug Set (LMC item) - anyone use this? Help or hurt flow? I put the cap on the driver side inlet, with the hose connected to the passenger side inlet, most of the air blows on the driver. I don't think this would be too much of a problem if you live in an area that is really hot. I realized that I have no center seat belt, so not likely to have a middle passenger either. __________________ Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100



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