Home » Public Forums » GMCnet » Anybody installed a Delco 20804130 Vacuum Pump?? (Mine leaks back badly)
| Anybody installed a Delco 20804130 Vacuum Pump?? [message #314526] |
Sun, 12 March 2017 18:05  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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OK Dave Lenzi sold me.
An Electric vacuum pump was on this winter's list.
I bought an ACDelco 20804130 Vacuum Pump (Bosch/Hella part) on Ebay. I finally got it plumbed in. (If you do not have significant metal working facilities available, consider buying Dave's manifold.)
The pump ran as soon as it was powered. It did not run and shut off. It did a lot of run-stop-run. I identified that the pump was leaking back very badly. So, I added another check valve. Unfortunately, the check valve available at the parts stores are all the CCV (Cheap Chinese Version) and they leak only somewhat less than the pump itself. I haven't tried it with the engine running because I still have to finish the cooling system flush. That will be later this week when I also load water and LP for the excursion to Shawnee.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Anybody installed a Delco 20804130 Vacuum Pump?? [message #314550 is a reply to message #314526] |
Mon, 13 March 2017 08:41  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I bought them off eBay and fitted barbed connectors to each end. Probably still chinee, but they worked. Current coach had one pulled out of a booster.. or anyway it's meant for a booster. Hose clamps to each end.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Anybody installed a Delco 20804130 Vacuum Pump?? [message #314564 is a reply to message #314526] |
Mon, 13 March 2017 11:37 |
armandminnie
Messages: 864
Registered: May 2009
Location: Marana, AZ
Karma: 2
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I talked to Dave a lot about how he recommends plumbing a vacuum pump. His plumbing has a separate vacuum switch that is on the opposite side of a check valve because vacuum pump check valves can leak. He also recommends that the vacuum switch be connected directly to the booster through a disabled check valve. Dave sells an adjustable vacuum switch and recommends it be set at 16 inches minimum. Mine is plumbed that way now.
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
visit my gmc blog
click here to visit gmcws.org
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| Re: [GMCnet] Anybody installed a Delco 20804130 Vacuum Pump?? [message #314575 is a reply to message #314526] |
Mon, 13 March 2017 16:06 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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If you want to buy the vacuum switch K058, be sure to search on-line
prices. I found it for $29.39 to $65.
I also found that RockAuto has the ACDelco 20804130 for $123.79 and that,
in case you want to hit the junkyards, it's OE on:
CADILLAC CTS 2008-2014
CADILLAC STS 2008-2011
CHEVROLET CAMARO 2010-2015
CHEVROLET CAPRICE 2016-2017
CHEVROLET HHR 2008-2010
PONTIAC SOLSTICE 2007-2009
SATURN SKY 2007-2010
That's ALL I know about them -- and that only because of curiosity since I
run Hydroboost. :-)
Ken H.
On Sun, Mar 12, 2017 at 7:05 PM, Matt Colie wrote:
> OK Dave Lenzi sold me.
> An Electric vacuum pump was on this winter's list.
>
> I bought an ACDelco 20804130 Vacuum Pump (Bosch/Hella part) on Ebay. I
> finally got it plumbed in. (If you do not have significant metal working
> facilities available, consider buying Dave's manifold.)
>
> The pump ran as soon as it was powered. It did not run and shut off. It
> did a lot of run-stop-run. I identified that the pump was leaking back very
> badly. So, I added another check valve. Unfortunately, the check valve
> available at the parts stores are all the CCV (Cheap Chinese Version) and
> they leak only somewhat less than the pump itself. I haven't tried it
> with the engine running because I still have to finish the cooling system
> flush. That will be later this week when I also load water and LP for the
> excursion to Shawnee.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Anybody installed a Delco 20804130 Vacuum Pump?? [message #314598 is a reply to message #314575] |
Tue, 14 March 2017 07:49 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Senior Member |
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The ford vacuum pump ( aka Ford Azzure vacuum pump) that was listed on eBay a while back is still easily found. The early f150 ecoboost pick up uses the same pump. They were notorious for corrosion, so Ford revised the design and the latest version has a black composite body. You can buy them here in Canada at the Ford dealer for just a bit over $200cad.
Les Burt
Montreal
'75 Eleganza 26'
The EWIP (Eternal Work In Progress)
> On Mar 13, 2017, at 5:06 PM, Ken Henderson wrote:
>
> If you want to buy the vacuum switch K058, be sure to search on-line
> prices. I found it for $29.39 to $65.
>
> I also found that RockAuto has the ACDelco 20804130 for $123.79 and that,
> in case you want to hit the junkyards, it's OE on:
>
> CADILLAC CTS 2008-2014
> CADILLAC STS 2008-2011
> CHEVROLET CAMARO 2010-2015
> CHEVROLET CAPRICE 2016-2017
> CHEVROLET HHR 2008-2010
> PONTIAC SOLSTICE 2007-2009
> SATURN SKY 2007-2010
>
> That's ALL I know about them -- and that only because of curiosity since I
> run Hydroboost. :-)
>
> Ken H.
>
>
>> On Sun, Mar 12, 2017 at 7:05 PM, Matt Colie wrote:
>>
>> OK Dave Lenzi sold me.
>> An Electric vacuum pump was on this winter's list.
>>
>> I bought an ACDelco 20804130 Vacuum Pump (Bosch/Hella part) on Ebay. I
>> finally got it plumbed in. (If you do not have significant metal working
>> facilities available, consider buying Dave's manifold.)
>>
>> The pump ran as soon as it was powered. It did not run and shut off. It
>> did a lot of run-stop-run. I identified that the pump was leaking back very
>> badly. So, I added another check valve. Unfortunately, the check valve
>> available at the parts stores are all the CCV (Cheap Chinese Version) and
>> they leak only somewhat less than the pump itself. I haven't tried it
>> with the engine running because I still have to finish the cooling system
>> flush. That will be later this week when I also load water and LP for the
>> excursion to Shawnee.
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Anybody installed a Delco 20804130 Vacuum Pump?? [message #314604 is a reply to message #314571] |
Tue, 14 March 2017 09:13 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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If you attempt to buy just the vacuum switch, be sure to search prices. I
did and found it priced from $29.39 to $67.
In the midst of that, I stumbled across what MIGHT be a good vacuum pump
for the GMC: AC 20804130 for $123.79 from RockAuto. It's supposed to fit:
CADILLAC CTS 2008-2014
CADILLAC STS 2008-2011
CHEVROLET CAMARO 2010-2015
CHEVROLET CAPRICE 2016-2017
CHEVROLET HHR 2008-2010
PONTIAC SOLSTICE 2007-2009
SATURN SKY 2007-2010
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc., etc.
www.gmcwipersetc.com
On Mon, Mar 13, 2017 at 2:20 PM, powerjon@chartermi.net wrote:[/color]
> I have one of Dave Lenzi first new vacuum layouts installed about 2 years
> ago. It was the first time that I have had really great brakes in all the
> years that I have owned a GMC coach.
>
> The connector to the booster, the aluminum 2 port adapter piece with the
> vacuum switch at the 3 o’clock position and the plugged port at the 6
> o’clock position.You can hitch a vacuum gauge at the plugged port to
> monitor the booster pressure. The black check valve is hitched directly to
> the Ford vacuum pump.
>
> http://www.gmcmhphotos.com/photos/general-pictures/
> p59296-dl-brake-layout.html
> http://www.gmcmhphotos.com/photos/general-pictures/
> p59295-dl-brake-layout.html
>
> Shows the master cylinder layout. I went from a P30 master back to a
> stock master to get the brake pressure up to over 1100 psig. My rear brake
> setup is a Lee Harrison 12.5 inch rotor with a 80 MM caliper. and a drum
> setup on the rear bogy with a 15/16 slave cylinder. I also swapped the
> brake lines on the master cylinder.
>
> http://www.gmcmhphotos.com/photos/general-pictures/
> p59294-dl-brake-layout.html
> http://www.gmcmhphotos.com/photos/general-pictures/
> p59297-dl-brake-layout.html
>
> The brake layout
>
> http://www.gmcmhphotos.com/photos/disk-brake-upgrade-
> leigh-harrison-brakes/p36854-disk-brake-upgrade-leigh-
> harrison-disk-package.html
> http://www.gmcmhphotos.com/photos/disk-brake-upgrade-
> leigh-harrison-brakes/p36871-disk-brake-upgrade-leigh-
> harrison-disk-package.html
> http://www.gmcmhphotos.com/photos/disk-brake-upgrade-
> leigh-harrison-brakes/p36859-disk-brake-upgrade-leigh-
> harrison-disk-package.html
> http://www.gmcmhphotos.com/photos/disk-brake-upgrade-
> leigh-harrison-brakes/p36861-disk-brake-upgrade-leigh-
> harrison-disk-package.html
>
> Dave uses a vacuum switch like this one which is adjustable.
>
> http://www.gmcmhphotos.com/photos/general-pictures/p58771-img-0782.html
> http://www.gmcmhphotos.com/photos/general-pictures/p58767-img-07801.html
>
> You can see the adjustment set and they supply the Allen wrench in the box.
>
> http://www.gmcmhphotos.com/photos/general-pictures/p58770-img-07811.html
>
> I set mine at 18 inches and I know that Dave have been using 20 inch. 16
> thru 20 gives you a nice firm pedal and the 18 and 20 inch are if you have
> the ford vacuum pump because of the fast recovery. It is a shame that the
> Ford vacuum pump is no long available although you may find it available on
> ebay at an unobtainium price.
>
> J.R. Wright
> GMC GreatLaker
> Newsletter Editor/Publisher
> Tech Editor
> 78 Buskirk 30' Stretch
> 75 Avion Under Reconstruction
> Michigan
>
>> On Mar 13, 2017, at 9:38 AM, Armand Minnie wrote:
>>
>> I talked to Dave a lot about how he recommends plumbing a vacuum pump.
> His plumbing has a separate vacuum switch that is on the opposite side of a
>> check valve because vacuum pump check valves can leak. He also
> recommends that the vacuum switch be connected directly to the booster
> through a
>> disabled check valve. Dave sells an adjustable vacuum switch and
> recommends it be set at 16 inches minimum. Mine is plumbed that way now.
>> --
>> Armand Minnie
>> Marana, AZ
>> '76 Eleganza II TZE166V103202
>> http://www.minniebiz.com
>> http://www.gmcws.org
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Anybody installed a Delco 20804130 Vacuum Pump?? [message #314670 is a reply to message #314664] |
Wed, 15 March 2017 13:36 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
|
Senior Member |
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Gentlemen,
I published a set of pictures that showed the setup that Dave makes and used a few days ago. I will repost here.
Repost:
I have one of Dave Lenzi first new vacuum layouts installed about 2 years ago. It was the first time that I have had really great brakes in all the years that I have owned a GMC coach.
The connector to the booster, the aluminum 2 port adapter piece with the vacuum switch at the 3 o’clock position and the plugged port at the 6 o’clock position.You can hitch a vacuum gauge at the plugged port to monitor the booster pressure. The black check valve is hitched directly to the Ford vacuum pump.
http://www.gmcmhphotos.com/photos/general-pictures/p59296-dl-brake-layout.html
http://www.gmcmhphotos.com/photos/general-pictures/p59295-dl-brake-layout.html
Shows the master cylinder layout. I went from a P30 master back to a stock master to get the brake pressure up to over 1100 psig. My rear brake setup is a Lee Harrison 12.5 inch rotor with a 80 MM caliper. and a drum setup on the rear bogy with a 15/16 slave cylinder. I also swapped the brake lines on the master cylinder.
http://www.gmcmhphotos.com/photos/general-pictures/p59294-dl-brake-layout.html
http://www.gmcmhphotos.com/photos/general-pictures/p59297-dl-brake-layout.html
The brake layout
http://www.gmcmhphotos.com/photos/disk-brake-upgrade-leigh-harrison-brakes/p36854-disk-brake-upgrade-leigh-harrison-disk-package.html
http://www.gmcmhphotos.com/photos/disk-brake-upgrade-leigh-harrison-brakes/p36871-disk-brake-upgrade-leigh-harrison-disk-package.html
http://www.gmcmhphotos.com/photos/disk-brake-upgrade-leigh-harrison-brakes/p36859-disk-brake-upgrade-leigh-harrison-disk-package.html
http://www.gmcmhphotos.com/photos/disk-brake-upgrade-leigh-harrison-brakes/p36861-disk-brake-upgrade-leigh-harrison-disk-package.html
Dave uses a vacuum switch like this one which is adjustable.
http://www.gmcmhphotos.com/photos/general-pictures/p58771-img-0782.html
http://www.gmcmhphotos.com/photos/general-pictures/p58767-img-07801.html
You can see the adjustment set and they supply the Allen wrench in the box.
http://www.gmcmhphotos.com/photos/general-pictures/p58770-img-07811.html
I set mine at 18 inches and I know that Dave have been using 20 inch. 16 thru 20 gives you a nice firm pedal and the 18 and 20 inch are if you have the ford vacuum pump because of the fast recovery. It is a shame that the Ford vacuum pump is no long available although you may find it available on ebay at an unobtainium price.
I went looking yesterday when some say that you can get that pump on Ebay or in Canada from a Ford deal and never found any in stock and there were notices posted on some of the website that this vacuum pump was no longer. If I am wrong post a shortcut or link to one for sale. When talking with Dave last summer I suggested that it might be good to use 2 of the Delco vacuum pumps in parallel to provide almost the same capacity as the Ford vacuum. I did look up the pump use on the 2012 V6 Ford 150 and the picture on the Rock auto website was not the same. If I am wrong again show me a link or shortcut. Just what everyone to know what is available.
J.R. Wright
GMC GreatLaker
Newsletter Editor/Publisher
Tech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan
> On Mar 15, 2017, at 11:18 AM, Rob Mueller wrote:
>
> Armand,
>
> I found a photo of Dave's manifold, it is an adapter that the pressure
> switch screws into and a standard check valve plugs into.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
>
> -----Original Message-----
> From: Armand
>
> Rob, I think that "Dave's manifold" is designed to be used on his rebuilt
> boosters which have a second check valve port intended for a vacuum pump.
> His recommended alternative would probably be to insert a "broken" check
> valve into a single-ported booster and then use plumbing and in-line check
> valves to accomplish the same thing but much more "kludgey" looking.
> --
> Armand
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Anybody installed a Delco 20804130 Vacuum Pump?? [message #315305 is a reply to message #314598] |
Sat, 01 April 2017 09:49 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Les,
I found them in the USA for $270.00; obviously at current exchange rates the
price in Canada is better.
http://tinyurl.com/n3srcjv
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Les Burt
Sent: Tuesday, March 14, 2017 7:49 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Anybody installed a Delco 20804130 Vacuum Pump??
The ford vacuum pump ( aka Ford Azzure vacuum pump) that was listed on eBay
a while back is still easily found. The early f150 ecoboost pick up uses
the same pump. They were notorious for corrosion, so Ford revised the design
and the latest version has a black composite body. You can buy them here in
Canada at the Ford dealer for just a bit over $200cad.
Les Burt
Montreal
'75 Eleganza 26'
The EWIP (Eternal Work In Progress)
> On Mar 13, 2017, at 5:06 PM, Ken Henderson wrote:
>
> If you want to buy the vacuum switch K058, be sure to search on-line
> prices. I found it for $29.39 to $65.
>
> I also found that RockAuto has the ACDelco 20804130 for $123.79 and that,
> in case you want to hit the junkyards, it's OE on:
>
> CADILLAC CTS 2008-2014
> CADILLAC STS 2008-2011
> CHEVROLET CAMARO 2010-2015
> CHEVROLET CAPRICE 2016-2017
> CHEVROLET HHR 2008-2010
> PONTIAC SOLSTICE 2007-2009
> SATURN SKY 2007-2010
>
> That's ALL I know about them -- and that only because of curiosity since I
> run Hydroboost. :-)
>
> Ken H.
>
>
>> On Sun, Mar 12, 2017 at 7:05 PM, Matt Colie
wrote:
>>
>> OK Dave Lenzi sold me.
>> An Electric vacuum pump was on this winter's list.
>>
>> I bought an ACDelco 20804130 Vacuum Pump (Bosch/Hella part) on Ebay. I
>> finally got it plumbed in. (If you do not have significant metal working
>> facilities available, consider buying Dave's manifold.)
>>
>> The pump ran as soon as it was powered. It did not run and shut off. It
>> did a lot of run-stop-run. I identified that the pump was leaking back
very
>> badly. So, I added another check valve. Unfortunately, the check valve
>> available at the parts stores are all the CCV (Cheap Chinese Version) and
>> they leak only somewhat less than the pump itself. I haven't tried it
>> with the engine running because I still have to finish the cooling system
>> flush. That will be later this week when I also load water and LP for
the
>> excursion to Shawnee.
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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