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Re: [GMCnet] Fuel Pump Poll [message #239193 is a reply to message #239185] Sat, 08 February 2014 11:19 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
jimk wrote on Sat, 08 February 2014 10:03

If your mechanical pump is over 4 years old, best to replace as the
ethanol is deteriating the diaphragm and you'll have fuel in the crank case.



Where did that idea come from? We have been under an EPA 10% ethanol mandate here since 1995. That is 19 years. I have never replaced a fuel pump of any kind for a leaking diaphragm and I know of no one else who has. We have diaphragm type pumps in all kinds of things from chain saws, to lawn mowers, to GMCs, to airplanes, and I have never replaced one. The last diaphragm pump I replaced was in 1961 on a 1954 Ford. In those days people could not even spell ethanol.

While I hate ethanol in gasoline, promoting an urban legend does not help it go away. I have replaced a couple of in tank rotary electric pumps for bad bearings.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Fuel Pump Poll [message #239222 is a reply to message #239193] Sat, 08 February 2014 17:53 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Ken,

Good point, I bought a mechanical fuel pump like the one below off eBay that can be disassembled.

http://tinyurl.com/q4u99hd

Mine IS compatible with the 455 / Toronado.

I want to see if / how the diaphragms are sealed off from the pumping lever and if they are not determine if it would be possible to
do so.

I'm thinking it might be possible to "semi seal" the lever from the crankcase and install an overboard vent that would dump the gas
on the ground rather than in the crankcase.

Probably a pipe dream! ;-)

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: Ken Burton

jimk wrote on Sat, 08 February 2014 10:03
> If your mechanical pump is over 4 years old, best to replace as the
> ethanol is deteriating the diaphragm and you'll have fuel in the crank case.

Where did that idea come from? We have been under an EPA 10% ethanol mandate here since 1995. That is 19 years. I have never
replaced a fuel pump of any kind for a leaking diaphragm and I know of no one else who has. We have diaphragm type pumps in all
kinds of things from chain saws, to lawn mowers, to GMCs, to airplanes, and I have never replaced one. The last diaphragm pump I
replaced was in 1961 on a 1954 Ford. In those days people could not even spell ethanol.

While I hate ethanol in gasoline, promoting an urban legend does not help it go away. I have replaced a couple of in tank rotary
electric pumps for bad bearings.
--
Ken

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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
Re: Fuel Pump Poll [message #239224 is a reply to message #221098] Sat, 08 February 2014 18:26 Go to previous messageGo to next message
kerry pinkerton is currently offline  kerry pinkerton   United States
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
Senior Member
Rob, why do you need 'high volume'?

Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
Re: Fuel Pump Poll [message #239226 is a reply to message #239152] Sat, 08 February 2014 18:42 Go to previous messageGo to next message
mikethebike is currently offline  mikethebike   United States
Messages: 331
Registered: January 2014
Karma: 0
Senior Member
pyolet wrote on Fri, 07 February 2014 21:26

In tank pumps selected with gauge switch. No more hot day, high altitude cavitation issues, even on E10.

W.




Back in 1981 I was rebuilding my brother-in-laws 1975 280/Z engine and while going through the Robert Bentley service manual I noticed a statement about the EFI fuel pump:

"The fuel pump maintains pressure of 37 PSI (that might not be THE number...it has been 33 years), vapor lock is not a problem."
Re: [GMCnet] Fuel Pump Poll [message #239229 is a reply to message #239224] Sat, 08 February 2014 18:52 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Kerry,

I don't.

I only bought it because you can disassemble it whereas the "normal" fuel pumps are "sealed" units.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: Kerry Pinkerton

Rob, why do you need 'high volume'?
--
Kerry

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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
Re: [GMCnet] Fuel Pump Poll [message #239343 is a reply to message #239229] Sun, 09 February 2014 20:51 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
And where have you located the fuel pump rebuild kit? Been at least 50
years since I was able to buy one of those -- which were then readily
available at Western Auto stores, or 'most anywhere else.. :-)

Ken H.

On Sat, Feb 8, 2014 at 7:52 PM, Robert Mueller wrote:

> Kerry,
>
> I don't.
>
> I only bought it because you can disassemble it whereas the "normal" fuel
> pumps are "sealed" units.
>
> -----Original Message-----
> From: Kerry Pinkerton
>
> Rob, why do you need 'high volume'?
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] Fuel Pump Poll [message #239357 is a reply to message #239343] Sun, 09 February 2014 22:19 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Ken,

The downside to installing an electric pump to feed the mechanical pump is that if the diaphragm in the mechanical pump fails you
can pump the crankcase full of fuel and destroy the engine.

I bought this pump because I noticed that the housing came apart.

I am not interested in rebuilding it.

I want to disassemble it and see if it is possible to seal the fuel off from the crankcase should the diaphragm fail.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: Ken Henderson

And where have you located the fuel pump rebuild kit? Been at least 50 years since I was able to buy one of those -- which were
then readily available at Western Auto stores, or 'most anywhere else.. :-)

Ken H.


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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
Re: [GMCnet] Fuel Pump Poll [message #239361 is a reply to message #239357] Sun, 09 February 2014 22:43 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
The only time I ever fed a mechanical pump from an electric pump, it was
accidental. To prepare the GMC for possible vapor lock in the western
mountains on the way to Alaska in 2000, I installed an electric pump and
tee'd the two outputs just before the carb. Depending on the mechanical
pump's output valve to prevent flow from the electrical pump into the
mechanical pump, I did not install any check valves. At the service
station inside the eastern entrance to Yellowstone NP, I found gas coming
out the TOP of the mechanical pump. Sure 'nuff, the output valve, and the
top seal on the mechanical pump had failed, dumping gas FAST.

Fortunately, I had a pipe plug so was able to eliminate the mechanical pump
and did the remaining 10,000+ miles of the trip with only the electrical
pump -- which was one of the two Carter 4070's I'm still running.

I'd NEVER intentionally feed a mechanical pump, attached to the crankcase,
from another pump.

Ken H.

On Sun, Feb 9, 2014 at 11:19 PM, Robert Mueller wrote:

> Ken,
>
> The downside to installing an electric pump to feed the mechanical pump is
> that if the diaphragm in the mechanical pump fails you
> can pump the crankcase full of fuel and destroy the engine.
> ...
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] Fuel Pump Poll [message #239364 is a reply to message #239361] Sun, 09 February 2014 23:22 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Ken,

Naturally I respect your point of view, however, I'll bet JimB has installed lots of these little pumps which put out 1 to 4.75 psi
and to date I haven't heard anyone noting their crankcase got pumped full of gas. GeneF noted that he was aware of two engines that
got trashed when the owner moved the mechanical fuel pump with a leaking diaphragm from a failed engine to the new engine.

I assume that the 4.75 psi is deadheaded and I'd be willing to wager under flow conditions the pressure they supply to the
mechanical pump inlet is down around a couple of psi. When one considers the 15 feet (?) of hose and the metal tube across the
bottom of the front cross member I'll bet it's even lower. Naturally when the float bowls are full they could supply the full 4.75
psi as the "system" would be deadheaded.

If I can find the time when I get back to the USA I'll try and run a test to see just how much pressure it does supply at the inlet
to the mechanical pump.

I AGREE that you could fill your crankcase with fuel and ruin the engine, however, I'm willing to take that risk as in my view
problems that could arise if the engine quits due to vapor lock are greater.

Yes there are other ways around the vapor lock problem but the Facet pump is the quickest and easiest solution.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Monday, February 10, 2014 3:44 PM
To: gmclist
Subject: Re: [GMCnet] Fuel Pump Poll

The only time I ever fed a mechanical pump from an electric pump, it was
accidental. To prepare the GMC for possible vapor lock in the western
mountains on the way to Alaska in 2000, I installed an electric pump and
tee'd the two outputs just before the carb. Depending on the mechanical
pump's output valve to prevent flow from the electrical pump into the
mechanical pump, I did not install any check valves. At the service
station inside the eastern entrance to Yellowstone NP, I found gas coming
out the TOP of the mechanical pump. Sure 'nuff, the output valve, and the
top seal on the mechanical pump had failed, dumping gas FAST.

Fortunately, I had a pipe plug so was able to eliminate the mechanical pump
and did the remaining 10,000+ miles of the trip with only the electrical
pump -- which was one of the two Carter 4070's I'm still running.

I'd NEVER intentionally feed a mechanical pump, attached to the crankcase,
from another pump.

Ken H.

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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
Re: [GMCnet] Fuel Pump Poll [message #239365 is a reply to message #239193] Sun, 09 February 2014 23:58 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
Ken Burton wrote on Sat, 08 February 2014 11:19

jimk wrote on Sat, 08 February 2014 10:03

If your mechanical pump is over 4 years old, best to replace as the
ethanol is deteriating the diaphragm and you'll have fuel in the crank case.



Where did that idea come from? We have been under an EPA 10% ethanol mandate here since 1995. That is 19 years. I have never replaced a fuel pump of any kind for a leaking diaphragm and I know of no one else who has. We have diaphragm type pumps in all kinds of things from chain saws, to lawn mowers, to GMCs, to airplanes, and I have never replaced one. The last diaphragm pump I replaced was in 1961 on a 1954 Ford. In those days people could not even spell ethanol.

While I hate ethanol in gasoline, promoting an urban legend does not help it go away. I have replaced a couple of in tank rotary electric pumps for bad bearings.


I need to correct this positing slightly. While I did not do the replacement work I was involved with a diaphragm style pump failure on an a GMC. I ran ran across a Canadian friend leaving Bean Station one year who could not get up enough power to climb the hill and cross over the pass west of Bean Station. I towed him up the hill to a crossover spot and headed him back down the hill to Bean Station again. When we got him back he determined that he had a fuel pump failure so we ran to NAPA in Knoxville on a Sunday and got him another one. I did not do the wrench work. I only provided the tow vehicle. We did not open the old pump to see if it was a check valve or diaphragm rupture failure.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Fuel Pump Poll [message #239370 is a reply to message #239364] Mon, 10 February 2014 07:00 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
Rob,

Fear of a ruptured mechanical diaphragm is only part of my refusal to pump
through one.

More important is the question of "why bother?". The benefits from the
rear-mounted electric pump argue in favor of it alone vs a mechanical pump
pump alone; it then follows that in case of a failure, I'd rather have
electrical redundancy than the mechanical pump.

Then there's the question of "why through?". It's trivially more difficult
to run the electrical pump in parallel with the mechanical pump (using
check valves), thus completely avoiding questions of pressure drop across
either of them as well as eliminating the diaphragm rupture question.

The real reason I originally installed the second pump, after deciding that
I would always have redundancy, was the abominable access to the Olds'
mechanical pump. It was a real PITA to get to the darned thing. The ease
of installation and maintenance of the electrical pump was child's play by
comparison, so when it came time to replace the mechanical, I resolved to
never fool with one again.

Finally, the elimination of the selector valve eliminated one more recently
failure-prone item, though mine went on to serve a new owner well.

So, while I was never paranoid about the hazard of diaphragm failure, I
just find it illogical to retain one.

JMHO,

Ken H.


On Mon, Feb 10, 2014 at 12:22 AM, Robert Mueller wrote:

> Ken,
>
> Naturally I respect your point of view, however, I'll bet JimB has
> installed lots of these little pumps which put out 1 to 4.75 psi
> and to date I haven't heard anyone noting their crankcase got pumped full
> of gas. GeneF noted that he was aware of two engines that
> got trashed when the owner moved the mechanical fuel pump with a leaking
> diaphragm from a failed engine to the new engine.

...
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] Fuel Pump Poll [message #239372 is a reply to message #239370] Mon, 10 February 2014 07:18 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Ken,

All valid points as well.

Bottom line: before I left the USA I purchased everything I need to convert the fuel delivery system to in tank electric pumps and
Poly Armour lines.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426


-----Original Message-----
From: Ken Henderson

Rob,

Fear of a ruptured mechanical diaphragm is only part of my refusal to pump
through one.

More important is the question of "why bother?". The benefits from the
rear-mounted electric pump argue in favor of it alone vs a mechanical pump
pump alone; it then follows that in case of a failure, I'd rather have
electrical redundancy than the mechanical pump.

Then there's the question of "why through?". It's trivially more difficult
to run the electrical pump in parallel with the mechanical pump (using
check valves), thus completely avoiding questions of pressure drop across
either of them as well as eliminating the diaphragm rupture question.

The real reason I originally installed the second pump, after deciding that
I would always have redundancy, was the abominable access to the Olds'
mechanical pump. It was a real PITA to get to the darned thing. The ease
of installation and maintenance of the electrical pump was child's play by
comparison, so when it came time to replace the mechanical, I resolved to
never fool with one again.

Finally, the elimination of the selector valve eliminated one more recently
failure-prone item, though mine went on to serve a new owner well.

So, while I was never paranoid about the hazard of diaphragm failure, I
just find it illogical to retain one.

JMHO,

Ken H.


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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
Re: [GMCnet] Fuel Pump Poll [message #239417 is a reply to message #239370] Mon, 10 February 2014 13:16 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
Senior Member
I'll sit on the other side.  I've not had a problem with the fitted pump.  I note that mine, like most of the others I've ever seen, has a weep hole which will drain fuel in the event of a diaphragm failure.  I find that feeding the thing the fuel it was designed for keeps it going without  lot of histrionics, and keeps me - so far - from fixing symptoms.    My only concern is a fairly regular trip to San Antonio, on which no decent gas is available.  For thatr one, I drive out on good gas, load it with junk, and come home early in the day.  This in August, I've had no problems.  Comes the day no decent gas can be had, I will rethink my position and (probably) stick somebody's TBI system on it.  Having had good luck with Holley elsewhere, it would currently be the weapon of choice, but I'll ask around when I get to that point.
 
--johnny

From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist <gmclist@temp.gmcnet.org>
Sent: Monday, February 10, 2014 8:00 AM
Subject: Re: [GMCnet] Fuel Pump Poll


Rob,

Fear of a ruptured mechanical diaphragm is only part of my refusal to pump
through one.

More important is the question of "why bother?".  The benefits from the
rear-mounted electric pump argue in favor of it alone vs a mechanical pump
pump alone; it then follows that in case of a failure, I'd rather have
electrical redundancy than the mechanical pump.

Then there's the question of "why through?".  It's trivially more difficult
to run the electrical pump in parallel with the mechanical pump (using
check valves), thus completely avoiding questions of pressure drop across
either of them as well as eliminating the diaphragm rupture question.

The real reason I originally installed the second pump, after deciding that
I would always have redundancy, was the abominable access to the Olds'
mechanical pump.  It was a real PITA to get to the darned thing.  The ease
of installation and maintenance of the electrical pump was child's play by
comparison, so when it came time to replace the mechanical, I resolved to
never fool with one again.

Finally, the elimination of the selector valve eliminated one more recently
failure-prone item, though mine went on to serve a new owner well.

So, while I was never paranoid about the hazard of diaphragm failure, I
just find it illogical to retain one.

JMHO,

Ken H.



On Mon, Feb 10, 2014 at 12:22 AM, Robert Mueller wrote:

> Ken,
>
> Naturally I respect your point of view, however, I'll bet JimB has
> installed lots of these little pumps which put out 1 to 4.75 psi
> and to date I haven't heard anyone noting their crankcase got pumped full
> of gas. GeneF noted that he was aware of two engines that
> got trashed when the owner moved the mechanical fuel pump with a leaking
> diaphragm from a failed engine to the new engine.
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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
Re: [GMCnet] Fuel Pump Poll [message #239419 is a reply to message #239417] Mon, 10 February 2014 13:44 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma: -62
Senior Member
When we crossed Canada on the GMC Cascaders Rolling Rally, we had failures
on three different coaches with three mechanical fuel pumps, Two were 455s,
and one was 403. Two quit pumping, and one broke the third fuel fitting or
return line fitting where it exits the pump body. Fuel leaks quite badly
when that happens. We quickly exhausted our onboard supply of spare pumps,
and were forced to purchase new ones in Jasper, Canada. We bought 2
mechanical and two Carter 4070 electric pumps. Rang up over $600.00 US
Dollars when all was paid for. But, we fixed all three and continued our
journey without towing bills. NAPA is alive and well in Canada. The
mechanical pumps are a wrestling match in the motor home. Try it in
Pocahontus Campground in the pouring rain with roving bears. Gives a whole
new meaning to the term emergency roadside repair. (Grin) Would not trade
the memories for anything. Part of owning a 40 year old vehicle that gets
used hard and put away wet.
Jim Hupy
Salem, OR
78 GMC Royale 403


On Mon, Feb 10, 2014 at 11:16 AM, Johnny Bridges <jhbridges@ymail.com>wrote:

> I'll sit on the other side. I've not had a problem with the fitted pump.
> I note that mine, like most of the others I've ever seen, has a weep hole
> which will drain fuel in the event of a diaphragm failure. I find that
> feeding the thing the fuel it was designed for keeps it going without lot
> of histrionics, and keeps me - so far - from fixing symptoms. My only
> concern is a fairly regular trip to San Antonio, on which no decent gas is
> available. For thatr one, I drive out on good gas, load it with junk, and
> come home early in the day. This in August, I've had no problems. Comes
> the day no decent gas can be had, I will rethink my position and (probably)
> stick somebody's TBI system on it. Having had good luck with Holley
> elsewhere, it would currently be the weapon of choice, but I'll ask around
> when I get to that point.
>
> --johnny
>
> From: Ken Henderson <hend4800@bellsouth.net>
> To: gmclist <gmclist@temp.gmcnet.org>
> Sent: Monday, February 10, 2014 8:00 AM
> Subject: Re: [GMCnet] Fuel Pump Poll
>
>
> Rob,
>
> Fear of a ruptured mechanical diaphragm is only part of my refusal to pump
> through one.
>
> More important is the question of "why bother?". The benefits from the
> rear-mounted electric pump argue in favor of it alone vs a mechanical pump
> pump alone; it then follows that in case of a failure, I'd rather have
> electrical redundancy than the mechanical pump.
>
> Then there's the question of "why through?". It's trivially more difficult
> to run the electrical pump in parallel with the mechanical pump (using
> check valves), thus completely avoiding questions of pressure drop across
> either of them as well as eliminating the diaphragm rupture question.
>
> The real reason I originally installed the second pump, after deciding that
> I would always have redundancy, was the abominable access to the Olds'
> mechanical pump. It was a real PITA to get to the darned thing. The ease
> of installation and maintenance of the electrical pump was child's play by
> comparison, so when it came time to replace the mechanical, I resolved to
> never fool with one again.
>
> Finally, the elimination of the selector valve eliminated one more recently
> failure-prone item, though mine went on to serve a new owner well.
>
> So, while I was never paranoid about the hazard of diaphragm failure, I
> just find it illogical to retain one.
>
> JMHO,
>
> Ken H.
>
>
>
> On Mon, Feb 10, 2014 at 12:22 AM, Robert Mueller wrote:
>
> > Ken,
> >
> > Naturally I respect your point of view, however, I'll bet JimB has
> > installed lots of these little pumps which put out 1 to 4.75 psi
> > and to date I haven't heard anyone noting their crankcase got pumped full
> > of gas. GeneF noted that he was aware of two engines that
> > got trashed when the owner moved the mechanical fuel pump with a leaking
> > diaphragm from a failed engine to the new engine.
> _______________________________________________
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>
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Re: [GMCnet] Fuel Pump Poll [message #239450 is a reply to message #239419] Mon, 10 February 2014 17:56 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
Senior Member
Well, "They seen ya coming" if it ran you $600.  However, bears or no, you're kinda vulnerable when the coach has quit.  Value of a heavy credit card honored in Canada.
 
--johnny
 
 


________________________________
From: James Hupy <jamesh1296@gmail.com>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Monday, February 10, 2014 2:44 PM
Subject: Re: [GMCnet] Fuel Pump Poll


When we crossed Canada on the GMC Cascaders Rolling Rally, we had failures
on three different coaches with three mechanical fuel pumps, Two were 455s,
and one was 403. Two quit pumping, and one broke the third fuel fitting or
return line fitting where it exits the pump body. Fuel leaks quite badly
when that happens. We quickly exhausted our onboard supply of spare pumps,
and were forced to purchase new ones in Jasper, Canada. We bought 2
mechanical and two Carter 4070 electric pumps. Rang up over $600.00 US
Dollars when all was paid for. But, we fixed all three and continued our
journey without towing bills. NAPA is alive and well in Canada. The
mechanical pumps are a wrestling match in the motor home. Try it in
Pocahontus Campground in the pouring rain with roving bears. Gives a whole
new meaning to the term emergency roadside repair. (Grin) Would not trade
the memories for anything. Part of owning a 40 year old vehicle that gets
used hard and put away wet.
Jim Hupy
Salem, OR
78 GMC Royale 403
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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
Re: [GMCnet] Fuel Pump Poll [message #239476 is a reply to message #239419] Mon, 10 February 2014 20:21 Go to previous messageGo to next message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
""When we crossed Canada on the GMC Cascaders Rolling Rally, we had failures
on three different coaches with three mechanical fuel pumps, Two were 455s,
and one was 403. Two quit pumping, and one broke the third fuel fitting or
return line fitting where it exits the pump body. Fuel leaks quite badly
when that happens. We quickly exhausted our onboard supply of spare pumps,
and were forced to purchase new ones in Jasper, Canada. We bought 2
mechanical and two Carter 4070 electric pumps. Rang up over $600.00 US
Dollars when all was paid for. But, we fixed all three and continued our
journey without towing bills. NAPA is alive and well in Canada. The
mechanical pumps are a wrestling match in the motor home. Try it in
Pocahontus Campground in the pouring rain with roving bears. Gives a whole
new meaning to the term emergency roadside repair. (Grin) Would not trade
the memories for anything. Part of owning a 40 year old vehicle that gets
used hard and put away wet.
Jim Hupy
Salem, OR
78 GMC Royale 403"'

We'll probsbly never settle this argument since we all have our own stories. Ever since I added a Carter backup pump I have failed 2 of them. I have never failed a mechanical pump although they are so inexpensive and so easy to replace (if you remove the fender liner), that I renew them every 10 years or so. I plan on doing that again soon. I consider my mechanical pump as the main pump and it serves me well 95% of the time. If I do get a hint of vapor lock, I activate the carter momentarily, and if it fails, I'll put up with a few sags and sputters but will not be stuck on the side of the road.


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: [GMCnet] Fuel Pump Poll [message #239477 is a reply to message #239450] Mon, 10 February 2014 20:36 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
Johnny Bridges wrote on Mon, 10 February 2014 17:56

Well, "They seen ya coming" if it ran you $600.  However, bears or no, you're kinda vulnerable when the coach has quit.  Value of a heavy credit card honored in Canada.
 
--johnny



I'm surprised that he did not hand one of the bears an umbrella to hold to keep him out of the rain while changing the pump.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Fuel Pump Poll [message #239545 is a reply to message #239477] Tue, 11 February 2014 13:12 Go to previous message
dwayne jacobson[1] is currently offline  dwayne jacobson[1]   United States
Messages: 345
Registered: July 2009
Karma: 0
Senior Member
LET ME tell you more about how Jim operates in a situation like this in the
wild. He finds bait and in this case it was yours truly. He had me on the
mat under the coach with my legs exposed to the beasts while he smugly
remained inside overtop the engine. You have to admit he is Smart.

The smell of my feet detered the bears from biting.

Dwayne
77 Kingsley (that lost the first mech fuel pump and given a spare by Dan
Borlace. )

REMINDER: May rally in Portland for the Kick off for those heading east to
Detroit then Chicago to start ROUTE 66 - JOIN US for part or all. Host
us!!!!


On Mon, Feb 10, 2014 at 6:36 PM, Ken Burton <n9cv@comcast.net> wrote:

>
>
> Johnny Bridges wrote on Mon, 10 February 2014 17:56
> > Well, "They seen ya coming" if it ran you $600. However, bears or no,
> you're kinda vulnerable when the coach has quit. Value of a heavy credit
> card honored in Canada.
> >
> > --johnny
>
> I'm surprised that he did not hand one of the bears an umbrella to hold to
> keep him out of the rain while changing the pump.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Dwayne Jacobson
White Rock BC
Cell: 604-644-8090
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