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Author
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Topic: How Much Does This Suck?
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horseballz
Gearhead Posts: 287
From: LasVegas,NV
Registered: Dec 99
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posted 02-13-2004 11:20 AM
   
Howdy,
Just tryin' to get everyone's attenion! 
- How much vacuum does the storage canister under the right front fender provide to the heating/AC system on a 68 with factory style AC? I am in the process of disassembling my heater box and all related parts to refurbish and replace all of the seals and gaskets on the flapper doors etc. I want to test and adjust all of the vacuum motors (4 or 5 of them) before reinstalling to assure proper operation and I don't want to damage the motors by applying too much vacuum!
- What is a convenient way to supply a proper vacuum source? Could I just jimmy-rig a hose to a light duty shop-vac or do I need to buy a vacuum pump?
- If I have to buy a pump, where do I find one?
- What's the best way to repair some damaged spots (a corner and an attachment point for one of the vacuum motors) on the heater box? The only idea I have had is to use fiberglass matting (I HATE
 working with that CRAP) and resin. Does anyone, please, have any other suggestions like maybe sheet metal and rivets? - I would glady replace the box if I could find one new or in good condition, but heater parts for 67/68 cars with factory AC are sadly few and far between. If anybody here has any ideas or a good heater box they want to part with please let me know.
- Any tips from someone who has done this kind of project will be greatly appreciated.
Thank You All Very Much,
Gene------------------
To quote my big brother: "Gettin' Old Ain't For Sissies"
'68 coupe
289/3speed out getting ready for paint and new 5.0/T5
'85 F150 Beater
300/Overdrive Stick
Pre-dented&scratched
'02 Ranger 4x4 Edge
'02 Miata
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johnmustang
Gearhead Posts: 5855
From: British Columbia , Canada
Registered: Nov 2001
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posted 02-13-2004 12:03 PM
By the title of the thread I thought you were talking about Monica and Bill------------------
JOHN
65 FASTBACK 2+2.....14.44 @ 107mph 1/4
87 TAURUS WAGON
03 F150 XLT SUPER CREW 4X4 SHORT BOX
Member:Vancouver Island Mustang Association
M&M #1710
65 FASTBACK
2003 F150 XLT SUPER CREW 4X4
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460-67Stang
Gearhead Posts: 289
From: Southern Ohio, USA
Registered: Feb 2001
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posted 02-13-2004 04:20 PM
quote:
I want to test and adjust all of the vacuum motors (4 or 5 of them) before reinstalling to assure proper operation and I don't want to damage the motors by applying too much vacuum
[/B]
Gene - Go buy one of those Mighty-Vac brand brake bleeding vacuum pump sets. Auto Zombie sells them. It comes with a hand pump which you can attach to each vacuum motor for testing. And you won't overpower the motors because vacuum builds according to pardon me here) the number of strokes you give it. It also has a built in guage so you can tell how much you're sucking (pardon again  ).
Brian
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horseballz
Gearhead Posts: 287
From: LasVegas,NV
Registered: Dec 99
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posted 02-13-2004 10:18 PM
See John,
quote:
Just tryin' to get everyone's attenion!
I got "YOUR" attention, didn't I?  I guess it just shows where your mind is at!!
All kidding aside, I'm happy to see that it seems you haven't had to sell your Fastback nad to let you know that you were missed when you weren't around for a while. I hope all is well with you.
And Brian, how much vacuum are those little vacuum motors supposed to see?  The car is totally diassembled so I can't fire it up to check.
Thanks for the replies
Gene------------------
To quote my big brother: "Gettin' Old Ain't For Sissies"
'68 coupe
289/3speed out getting ready for paint and new 5.0/T5
'85 F150 Beater
300/Overdrive Stick
Pre-dented&scratched
'02 Ranger 4x4 Edge
'02 Miata [This message has been edited by horseballz (edited 02-13-2004).]
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RonnieT
Gearhead Posts: 827
From: Port Allen, La. 70767
Registered: Jun 99
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posted 02-16-2004 09:59 PM
Gene, Those motors can see intake manifold vacuum at idle, 18 - 22", but you should not need to apply that much to make the doors move. I would think that all the doors should move with no more that 14" of vacuum. ------------------
Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23
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Ryan Wilke
Gearhead Posts: 2060
From: Stanton, Michigan 49707
Registered: Oct 2000
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posted 02-17-2004 09:34 AM
Gene,
You may want to investigate your local junkyard for an electric vacuum pump unit. As I recall, Ford put an electric vacuum pump on their AC-equipped diesel truck engines. It was used to open the AC doors in the case & it is strong and reliable. If you look under the hood of most AC-equipped diesel F250-350-450s, etc. trucks, '99 and up models you will find it. It will be mounted on the right fender by the AC case. 15 inches of vac shouldn't be a problem with one. Or even check out what they cost new over-the-counter at your FoMoCo dealer - they may be cheap enough there!Good Luck!
Ryan 
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horseballz
Gearhead Posts: 287
From: LasVegas,NV
Registered: Dec 99
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posted 02-17-2004 11:18 AM
Hi,
Thanks for the replies, guys. Mighty Vac $25 at Auto Zombie, also available as a loaner tool (you buy it as a deposit and then bring it back for a full refund). For the price it might not be bad to own one. Has anyone evr used it for brake bleeding? I've been told that pressure bleeding and vacuum bleeding doesn't really work that well and that the only good way to bleed brakes is the old tried and true "One person pumpin' and one person wrenchin'". All comments are welcomed.
Thanks again,
Gene
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