Front Clip removal Q, The Flapper and AC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MusicMan70** · 08-07-2011, 08:18 PM

Hey Folks,

In the process of removing my cowl to do a front clip removal and I noticed this Flapper part that appears to be broken. Something to do with the AC I'm guessing. I did not see it in the Brother's catalog;

What's it's purpose and are these reproduced?

Also in reference to my last pic;

Is this where I need to disconnect the AC to pull the front clip?

Thanks for any and all responses....Henry

**leddzepp** · 08-08-2011, 12:21 AM

That is your fresh air intake flapper. It needs to be closed when the A/C is running, and open when the heater is running. (short answer) I do not believe the flapper is reproduced. No worries, they are abundant in the local pick n pull yards.

Yes, that is where you disconnect the A/C if you are pulling the doghouse.

**MusicMan70** · 08-08-2011, 01:04 AM

Thank you so much LZ.....!

**leddzepp** · 08-08-2011, 01:13 AM

NP. By the way, is that Wienermobile in your avatar local? I have seen one several times on the 10 fwy. near Ontario.

**MusicMan70** · 08-08-2011, 01:37 AM

No that is pic off the net, although I have seen one on occasion going up the 605 by Whittier. I remember when "Lil' Oscar" used to come around to the local supermarkets and give out whistles and stuff. Back in the day-o.....

mrein3 · 08-08-2011, 08:12 AM

If I was going to open up a charged AC system I wouldn't do it there. Legally you should have it recovered.
Back in the day a mechanic would crack open the big nut on the back of the POA valve. When it was legal you wanted to vent the freon to the atmosphere slowly so no oil would rush out with it.

Once it is discharged you can open those two lines up under the battery tray.

71meangreenc10 · 08-08-2011, 02:54 PM

LMC has the flapper....Just put one in my truck the other day....

Smitty

69sixpackbee · 08-08-2011, 04:31 PM

LMC has em. thirty-bucks

http://www.lmctruck.com/icatalog/cb/full.aspx?Page=120

**MusicMan70** · 08-08-2011, 05:42 PM

AH the joys of the 67-72 Message board

....

Thanks to all and to the heads up about bleeding out the AC system(MREIN)...I forgot to ask about that and appreciate that you brought it up.
Kudos for the LMC info and link as well! Henry

08-07-2011, 08:18 PM	#1
MusicMan70 Senior Member Join Date: Feb 2011 Location: Corona, CA Posts: 1,842	Front Clip removal Q, The Flapper and AC Hey Folks, In the process of removing my cowl to do a front clip removal and I noticed this Flapper part that appears to be broken. Something to do with the AC I'm guessing. I did not see it in the Brother's catalog; What's it's purpose and are these reproduced? Also in reference to my last pic; Is this where I need to disconnect the AC to pull the front clip? Thanks for any and all responses....Henry Attached Images __________________ MusicMan70 1961 GMC Suburban

08-08-2011, 12:21 AM	#2
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,031	Re: Front Clip removal Q, The Flapper and AC That is your fresh air intake flapper. It needs to be closed when the A/C is running, and open when the heater is running. (short answer) I do not believe the flapper is reproduced. No worries, they are abundant in the local pick n pull yards. Yes, that is where you disconnect the A/C if you are pulling the doghouse. __________________ 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

08-08-2011, 01:04 AM	#3
MusicMan70 Senior Member Join Date: Feb 2011 Location: Corona, CA Posts: 1,842	Re: Front Clip removal Q, The Flapper and AC Thank you so much LZ.....! __________________ MusicMan70 1961 GMC Suburban

08-08-2011, 01:13 AM	#4
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,031	Re: Front Clip removal Q, The Flapper and AC NP. By the way, is that Wienermobile in your avatar local? I have seen one several times on the 10 fwy. near Ontario. __________________ 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

08-08-2011, 01:37 AM	#5
MusicMan70 Senior Member Join Date: Feb 2011 Location: Corona, CA Posts: 1,842	Re: Front Clip removal Q, The Flapper and AC No that is pic off the net, although I have seen one on occasion going up the 605 by Whittier. I remember when "Lil' Oscar" used to come around to the local supermarkets and give out whistles and stuff. Back in the day-o..... __________________ MusicMan70 1961 GMC Suburban

08-08-2011, 08:12 AM	#6
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,254	Re: Front Clip removal Q, The Flapper and AC If I was going to open up a charged AC system I wouldn't do it there. Legally you should have it recovered. Back in the day a mechanic would crack open the big nut on the back of the POA valve. When it was legal you wanted to vent the freon to the atmosphere slowly so no oil would rush out with it. Once it is discharged you can open those two lines up under the battery tray. __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN

08-08-2011, 02:54 PM	#7
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,179	Re: Front Clip removal Q, The Flapper and AC LMC has the flapper....Just put one in my truck the other day.... Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van"

08-08-2011, 04:31 PM	#8
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	Re: Front Clip removal Q, The Flapper and AC LMC has em. thirty-bucks http://www.lmctruck.com/icatalog/cb/full.aspx?Page=120

08-08-2011, 05:42 PM	#9
MusicMan70 Senior Member Join Date: Feb 2011 Location: Corona, CA Posts: 1,842	Re: Front Clip removal Q, The Flapper and AC AH the joys of the 67-72 Message board.... Thanks to all and to the heads up about bleeding out the AC system(MREIN)...I forgot to ask about that and appreciate that you brought it up. Kudos for the LMC info and link as well! Henry __________________ MusicMan70 1961 GMC Suburban

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