[GMCnet] Vacuum hose routing diagram [message #179314] |
Mon, 06 August 2012 23:07  |
RicksGMC
 Messages: 145 Registered: May 2012
Karma: 0
|
Senior Member |
|
|
Is there a diagram out there that shows the correct routing and connections for the engine vacuum lines?
I was looking under the hood and noticed a vacuum "chamber" mounted to the drivers side of heater box (?) just to the right of the washer fluid container, but there are no hoses or anything attached to it ?????
Engine appears to be running fine, I don't have a vacuum gauge (yet!) so I have not checked vacuum levels.
Rick Drummond
Prior Lake MN
1974 (re-)Painted Desert 26'
TZE064V100077
Photos: http://www.gmcmhphotos.com/photos/u18085-r-drummond.html
Email: RandTs.GMC@gmail.com
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Rick
Rick&Tammy Drummond
Prior Lake MN
'74 (re)Painted Desert
|
|
|
|
|
Re: [GMCnet] Vacuum hose routing diagram [message #180566 is a reply to message #179369] |
Thu, 16 August 2012 21:51   |
RicksGMC
 Messages: 145 Registered: May 2012
Karma: 0
|
Senior Member |
|
|
Investigated the vacuum lines and sure enough the PO had bypassed the vacuum chamber completely. Hooked up my vacuum tester and checked all the lines and none of them would hold vacuum!
Ended up replacing all the vacuum hoses (one at a time) and reconnecting the vacuum chamber, retested the lines and all held perfectly. It's amazing the thing even ran.
My AC and cruise control never have worked for me, I'm curious if this will help those issues too.
Thanks for all the photo's, suggestions, and advise!
Rick Drummond
Prior Lake MN
1974 (re-)Painted Desert 26'
TZE064V100077
Photos: http://www.gmcmhphotos.com/photos/u18085-r-drummond.html
Email: RandTs.GMC@gmail.com
On Aug 7, 2012, at 11:06 AM, A. <markbb1@netzero.com> wrote:
>
>
> RicksGMC wrote on Mon, 06 August 2012 23:07
>> Is there a diagram out there that shows the correct routing and connections for the engine vacuum lines?
>> I was looking under the hood and noticed a vacuum "chamber" mounted to the drivers side of heater box (?) just to the right of the washer fluid container, but there are no hoses or anything attached to it ?????
>> Engine appears to be running fine, I don't have a vacuum gauge (yet!) so I have not checked vacuum levels.
>>
>>
>>
>> Rick Drummond
>> Prior Lake MN
>> 1974 (re-)Painted Desert 26'
>> TZE064V100077
>> Photos: http://www.gmcmhphotos.com/photos/u18085-r-drummond.html
>> Email: RandTs.GMC@gmail.com
> That's the vacuum canister for the heater/AC actuators. If everything is working on the heater/AC, maybe a PO installed another one somewhere else. I suppose one could bypass it by just splicing the input hose to the output hose. Not sure how well the heater/AC acuators would work then?
> --
> '73 23' CanyonLands
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Rick
Rick&Tammy Drummond
Prior Lake MN
'74 (re)Painted Desert
|
|
|
|
Re: [GMCnet] Vacuum hose routing diagram [message #180608 is a reply to message #180566] |
Fri, 17 August 2012 07:56  |
Ray Erspamer
 Messages: 1707 Registered: May 2007 Location: Milwaukee Wisconsin
Karma: -3
|
Senior Member |
|
|
Chances are your cruise and AC may now work fine !! Good find Rick !!
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Rick <randts.gmc@gmail.com>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Thu, August 16, 2012 9:51:13 PM
Subject: Re: [GMCnet] Vacuum hose routing diagram
Investigated the vacuum lines and sure enough the PO had bypassed the vacuum
chamber completely. Hooked up my vacuum tester and checked all the lines and
none of them would hold vacuum!
Ended up replacing all the vacuum hoses (one at a time) and reconnecting the
vacuum chamber, retested the lines and all held perfectly. It's amazing the
thing even ran.
My AC and cruise control never have worked for me, I'm curious if this will help
those issues too.
Thanks for all the photo's, suggestions, and advise!
Rick Drummond
Prior Lake MN
1974 (re-)Painted Desert 26'
TZE064V100077
Photos: http://www.gmcmhphotos.com/photos/u18085-r-drummond.html
Email: RandTs.GMC@gmail.com
On Aug 7, 2012, at 11:06 AM, A. <markbb1@netzero.com> wrote:
>
>
> RicksGMC wrote on Mon, 06 August 2012 23:07
>> Is there a diagram out there that shows the correct routing and connections for
>>the engine vacuum lines?
>> I was looking under the hood and noticed a vacuum "chamber" mounted to the
>>drivers side of heater box (?) just to the right of the washer fluid container,
>>but there are no hoses or anything attached to it ?????
>> Engine appears to be running fine, I don't have a vacuum gauge (yet!) so I have
>>not checked vacuum levels.
>>
>>
>>
>> Rick Drummond
>> Prior Lake MN
>> 1974 (re-)Painted Desert 26'
>> TZE064V100077
>> Photos: http://www.gmcmhphotos.com/photos/u18085-r-drummond.html
>> Email: RandTs.GMC@gmail.com
> That's the vacuum canister for the heater/AC actuators. If everything is
>working on the heater/AC, maybe a PO installed another one somewhere else. I
>suppose one could bypass it by just splicing the input hose to the output hose.
>Not sure how well the heater/AC acuators would work then?
> --
> '73 23' CanyonLands
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
|
|
|