Need some help or pics for this - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1972SUPERSB · 09-27-2012, 09:29 AM

Here are some pics of my vacuum diaphrahm under the hood. It is missing something but im not sure what. If someone could tell me whats missing or even better a picture to what I need. Not even sure what door or flap it is supposed to open? It works with the vacuum hose hooked up to it just doesnt do anything. It hought it may work with the passenger side kcik panel fresh air actuator but not sure?

**RenoKeene** · 09-27-2012, 11:13 AM

It operates the fresh air flap in the cowel, which has the post broken off or is missing alltogether. LMC sells them. Here is a pic.....

**RenoKeene** · 09-27-2012, 11:16 AM

Part #32-0790
Here is the link
http://www.lmctruck.com/icatalog/cb/full.aspx?Page=120

custom1970 · 09-27-2012, 11:38 AM

I think he might be talking about the arm/linkage that goes from the diaphragm to the firewall. Reason i say that is mine is also missing and i need one to. Been meaning to look for one for a while now.

1972SUPERSB · 09-27-2012, 12:56 PM

Quote:

Originally Posted by custom1970

I think he might be talking about the arm/linkage that goes from the diaphragm to the firewall. Reason i say that is mine is also missing and i need one to. Been meaning to look for one for a while now.

Yes I see the hole in front of it and was wondering what it was for. Someone said it may be for the antenna? I'm sure there is peice that would connect to the flap. Thanks for the link by the way to LMC.
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**RenoKeene** · 09-27-2012, 01:03 PM

The arm/link you guys are talking about is the post on the flap...all one piece. Look at the LMC link I posted. You have to replace the whole flap.

custom1970 · 09-27-2012, 01:15 PM

Unless I'm wrong the arm doesn't come with the flap. The body shop lost mine a long time ago.

1972SUPERSB · 09-27-2012, 01:19 PM

That's exactly what I need. Thanks
Posted via Mobile Device

custom1970 · 09-27-2012, 01:40 PM

If you find and extra one let me know,

**RenoKeene** · 09-27-2012, 01:43 PM

Quote:

Originally Posted by custom1970

Unless I'm wrong the arm doesn't come with the flap. The body shop lost mine a long time ago.

Your right Dave but if the post is not sticking out of the hole it is broken off. The arm slips over the post and is held on by a screw in a thru hole on the post. Be very carefull when you put the new pieces together as there is not a lot of meat around the thru hole and if you don't have the stock screw and use what you think will fit tight (like I did) the screw will break the post at the thru hole. Ask me how I know.

**RenoKeene** · 09-27-2012, 01:54 PM

Quote:

Originally Posted by custom1970

If you find and extra one let me know,

If all your missing is the arm it would be easy to make one out of hollow tubing, measure for length, flatten one end and bend it 90 deg and drill a hole for the diaphram and another hole where it slips over the post. Just a thought.
Probably easier to find one on the parts board though

custom1970 · 09-27-2012, 01:56 PM

Brad, here a pic of what i have (not deliberately trying to hijack the thread) so what your telling me is we both need that flap and pieces, the arm and the white plastic piece (he has the white pc)?? How hard was it to replace yours? Any ideas as to where we could find that arm?

custom1970 · 09-27-2012, 02:07 PM

1972Super, here's a pic i found of what the arm installed looks like.

**RenoKeene** · 09-27-2012, 02:34 PM

Yep, you need the flap, arm and plastic piece. You can get the flap from LMC (only supplier I found) and make the arm and plastic piece that goes on the firewall. You might get lucky on the parts board with the plastic piece and the arm but the flaps are probably all toast (weak design).
If you would like I can pull my arm and draw one up for you to make (I draw on a computer for a living), same with the plastic piece.
Look on the pic you posted...the little screw on the top of the arm goes through the flap post, thats what holds the arm to the post and allows the whole thing to turn.
You should be able to look in the cowel and see the flap (if its there). Reach in and pull the pin with the spring on it and take the flap out. Should come out easy with the post broke off.
If I can help you guys out let me know, I'll be glad to.

1972SUPERSB · 09-27-2012, 02:39 PM

Quote:

Originally Posted by custom1970

1972Super, here's a pic i found of what the arm installed looks like.

Yeah this pic helps a lot. We may be able to find one a junk yard if we are lucky? Or make one like you said
Posted via Mobile Device

Andy4639 · 09-27-2012, 04:59 PM

For the plastic just use a o-ring. I did away with mine all together. Mine runs 38 degree's all the time. I sealed it up with ac tape and a peice of thin sheetmetal.
The arm is a simple fix as stated. Tubing the right size and use a small cotter key are very small screw.

09-27-2012, 09:29 AM	#1
1972SUPERSB Registered User Join Date: Sep 2012 Location: San Antonio, TX Posts: 1,026	Need some help or pics for this Here are some pics of my vacuum diaphrahm under the hood. It is missing something but im not sure what. If someone could tell me whats missing or even better a picture to what I need. Not even sure what door or flap it is supposed to open? It works with the vacuum hose hooked up to it just doesnt do anything. It hought it may work with the passenger side kcik panel fresh air actuator but not sure? Attached Images __________________ Jeff 1972 Cheyenne Super SWB 350, Auto, Bucket Seats w/Console, Tach, Factory A/C, P/S ,P/B, Tilt 1998 Chevy 1500 Ext Cab 5.7, Pewter w/blue interior

09-27-2012, 11:13 AM	#2
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,029	Re: Need some help or pics for this It operates the fresh air flap in the cowel, which has the post broken off or is missing alltogether. LMC sells them. Here is a pic..... Attached Images __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

09-27-2012, 11:38 AM	#4
custom1970 Member Join Date: Jan 2011 Location: Stuart, Florida Posts: 467	Re: Need some help or pics for this I think he might be talking about the arm/linkage that goes from the diaphragm to the firewall. Reason i say that is mine is also missing and i need one to. Been meaning to look for one for a while now. __________________ 1970 CST LB Fleetside, 402 BB, PS, PB,AC 1968 Firebird 400 conv. 1965 Chris Craft 17' wood ski boat (SN #0001)

09-27-2012, 01:03 PM	#6
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,029	Re: Need some help or pics for this The arm/link you guys are talking about is the post on the flap...all one piece. Look at the LMC link I posted. You have to replace the whole flap. __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

09-27-2012, 01:15 PM	#7
custom1970 Member Join Date: Jan 2011 Location: Stuart, Florida Posts: 467	Re: Need some help or pics for this Unless I'm wrong the arm doesn't come with the flap. The body shop lost mine a long time ago. Attached Images __________________ 1970 CST LB Fleetside, 402 BB, PS, PB,AC 1968 Firebird 400 conv. 1965 Chris Craft 17' wood ski boat (SN #0001)

09-27-2012, 11:16 AM	#3
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,029	Re: Need some help or pics for this Part #32-0790 Here is the link http://www.lmctruck.com/icatalog/cb/full.aspx?Page=120 __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

09-27-2012, 01:19 PM	#8
1972SUPERSB Registered User Join Date: Sep 2012 Location: San Antonio, TX Posts: 1,026	Re: Need some help or pics for this That's exactly what I need. Thanks Posted via Mobile Device __________________ Jeff 1972 Cheyenne Super SWB 350, Auto, Bucket Seats w/Console, Tach, Factory A/C, P/S ,P/B, Tilt 1998 Chevy 1500 Ext Cab 5.7, Pewter w/blue interior

09-27-2012, 01:40 PM	#9
custom1970 Member Join Date: Jan 2011 Location: Stuart, Florida Posts: 467	Re: Need some help or pics for this If you find and extra one let me know, __________________ 1970 CST LB Fleetside, 402 BB, PS, PB,AC 1968 Firebird 400 conv. 1965 Chris Craft 17' wood ski boat (SN #0001)

09-27-2012, 01:56 PM	#12
custom1970 Member Join Date: Jan 2011 Location: Stuart, Florida Posts: 467	Re: Need some help or pics for this Brad, here a pic of what i have (not deliberately trying to hijack the thread) so what your telling me is we both need that flap and pieces, the arm and the white plastic piece (he has the white pc)?? How hard was it to replace yours? Any ideas as to where we could find that arm? Attached Images __________________ 1970 CST LB Fleetside, 402 BB, PS, PB,AC 1968 Firebird 400 conv. 1965 Chris Craft 17' wood ski boat (SN #0001)

09-27-2012, 02:07 PM	#13
custom1970 Member Join Date: Jan 2011 Location: Stuart, Florida Posts: 467	Re: Need some help or pics for this 1972Super, here's a pic i found of what the arm installed looks like. Attached Images __________________ 1970 CST LB Fleetside, 402 BB, PS, PB,AC 1968 Firebird 400 conv. 1965 Chris Craft 17' wood ski boat (SN #0001)

09-27-2012, 02:34 PM	#14
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,029	Re: Need some help or pics for this Yep, you need the flap, arm and plastic piece. You can get the flap from LMC (only supplier I found) and make the arm and plastic piece that goes on the firewall. You might get lucky on the parts board with the plastic piece and the arm but the flaps are probably all toast (weak design). If you would like I can pull my arm and draw one up for you to make (I draw on a computer for a living), same with the plastic piece. Look on the pic you posted...the little screw on the top of the arm goes through the flap post, thats what holds the arm to the post and allows the whole thing to turn. You should be able to look in the cowel and see the flap (if its there). Reach in and pull the pin with the spring on it and take the flap out. Should come out easy with the post broke off. If I can help you guys out let me know, I'll be glad to. __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

09-27-2012, 04:59 PM	#16
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Need some help or pics for this For the plastic just use a o-ring. I did away with mine all together. Mine runs 38 degree's all the time. I sealed it up with ac tape and a peice of thin sheetmetal. The arm is a simple fix as stated. Tubing the right size and use a small cotter key are very small screw. __________________ 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.



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