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Re: [GMCnet] Fuel filters [message #328162 is a reply to message #132941] Fri, 12 January 2018 09:07 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
Messages: 3023
Registered: October 2006
Location: Woodstock, IL
Karma: 16
Senior Member
Seems tanks are either opperating room clean or nasty. If clean, you don't need add-on filters (added fail or fire risk) and if the tanks are nasty due to dirt in filter evidence, they need to be dropped and corrected.

John Lebetski
Woodstock, IL
77 Eleganza II
Re: [GMCnet] Fuel filters [message #328163 is a reply to message #132941] Fri, 12 January 2018 09:38 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
Messages: 4616
Registered: May 2010
Karma: 34
Senior Member
Fuel filters do serve a real purpose. Fuel is not always clean when it is
delivered to stations, nor are station storage tanks necessarily debris
free. Most pumps do not filter fuel either. So, if you rely upon the carb
inlet filter exclusively to deliver clean fuel, expect it to require
service. Carry spares. If you use an electric auxiliary fuel pump, most of
them require a pre filter as well.
I guess that it comes back to periodic maintenance. Air filters, fuel
filters, lug nuts, tire pressures, lubrication, oil changes, walk around to
check lighting, etc. Pretty necessary on 40 year old vehicles.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Jan 12, 2018 7:07 AM, "John R. Lebetski" wrote:

Seems tanks are either opperating room clean or nasty. If clean, you don't
need add-on filters (added fail or fire risk) and if the tanks are nasty
due to dirt in filter evidence, they need to be dropped and corrected.
--
John Lebetski
Woodstock, IL
77 Eleganza II


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Re: [GMCnet] Fuel filters [message #328172 is a reply to message #328163] Fri, 12 January 2018 13:28 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
Messages: 4573
Registered: July 2006
Location: Belmont, CA
Karma: 5
Senior Member
I tend to differ on the non use of the filter, as people tell me their tank
is clean. So we do not addres it when it comes into our shop.
Well, after picking up the coach they call us all upset and wonder whey
they are having fuel delivery problem.
The Aux tank can be the big source of problem as the fuel is not run down
close to empty and gum build up is removed and captured by the filter.
I do not carry hardly any spare parts crossing the Western states other
than a dist. module , coil and filters. Oh, a fan belt.

On Fri, Jan 12, 2018 at 7:38 AM, James Hupy wrote:

> Fuel filters do serve a real purpose. Fuel is not always clean when it is
> delivered to stations, nor are station storage tanks necessarily debris
> free. Most pumps do not filter fuel either. So, if you rely upon the carb
> inlet filter exclusively to deliver clean fuel, expect it to require
> service. Carry spares. If you use an electric auxiliary fuel pump, most of
> them require a pre filter as well.
> I guess that it comes back to periodic maintenance. Air filters, fuel
> filters, lug nuts, tire pressures, lubrication, oil changes, walk around to
> check lighting, etc. Pretty necessary on 40 year old vehicles.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Jan 12, 2018 7:07 AM, "John R. Lebetski"
> wrote:
>
> Seems tanks are either opperating room clean or nasty. If clean, you don't
> need add-on filters (added fail or fire risk) and if the tanks are nasty
> due to dirt in filter evidence, they need to be dropped and corrected.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk-AT-appliedairfilters-DOT-com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk-AT-appliedairfilters-DOT-com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Fuel filters [message #328174 is a reply to message #328163] Fri, 12 January 2018 14:25 Go to previous messageGo to next message
powwerjon is currently offline  powwerjon   United States
Messages: 314
Registered: March 2013
Karma: 1
Senior Member
There no such as a clean fuel tank as the fuel being loaded into your tank can have contaminates at any time, including the stuff that get loaded when the gas station storage tanks are low and haven’t been cleaned lately and that happens not as often as you think and the possible contaminated fuel right out other delivery tanker.

In the first coach which was a 77 Eleganza II with a 403 and Paterson Carb and all electric fuel system with mechanic pump removed I ran 2 fuel filters. One before the pump in the back and one before the carb in the front. I also which was my choice to remove the internal fuel filter in the carb. I change the filters in the spring and in the fall. The front filter was moved to the back and the back and a new filter was installed in the front. Twice a year for us because the coach was used year round with trips to Florida or Arizona in the winter. Those of you that store your GMC would only need to replace the filters in the spring.

http://www.gmcmhphotos.com/photos/electric-fuel-pump-26amp-3b-filter/p9898.htmloperating

Our currant GMC is a Buskirk Stretch actual length 29.5 foot long. It has an MPFI with a low pressure and High pressure pumps located back near the fuel selector valves, which were changed recently. The first is a large preflight that also is a coalescing filter to remove any water that may get loaded from the stations tanks. It then is pumped by the Low Pressure Pump (carter P4070) and then to the High Pressure which is our case is a pump used by Mercedes 450SEL then the final filter to the fuel rail and returned to the tank that in comes out of.

J.R. Wright
GMC GreatLakerTech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan

> On Jan 12, 2018, at 8:38 AM, James Hupy wrote:
> Fuel filters do serve a real purpose. Fuel is not always clean when it is
> delivered to stations, nor are station storage tanks necessarily debris
> free. Most pumps do not filter fuel either. So, if you rely upon the carb
> inlet filter exclusively to deliver clean fuel, expect it to require
> service. Carry spares. If you use an electric auxiliary fuel pump, most of
> them require a pre filter as well.
> I guess that it comes back to periodic maintenance. Air filters, fuel
> filters, lug nuts, tire pressures, lubrication, oil changes, walk around to
> check lighting, etc. Pretty necessary on 40 year old vehicles.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Jan 12, 2018 7:07 AM, "John R. Lebetski" wrote:
>
> Seems tanks are either operating room clean or nasty. If clean, you don't
> need add-on filters (added fail or fire risk) and if the tanks are nasty
> due to dirt in filter evidence, they need to be dropped and corrected.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>


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Re: [GMCnet] Fuel filters [message #328176 is a reply to message #328174] Fri, 12 January 2018 14:37 Go to previous messageGo to next message
powwerjon is currently offline  powwerjon   United States
Messages: 314
Registered: March 2013
Karma: 1
Senior Member
J.R. Wright
GMC Great Laker
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 30' Stretch
75 Avion (Under going Frame up Restoration)


On Fri, Jan 12, 2018 at 1:25 PM, John Wright wrote:

> There no such as a clean fuel tank as the fuel being loaded into your tank
> can have contaminates at any time, including the stuff that get loaded when
> the gas station storage tanks are low and haven’t been cleaned lately and
> that happens not as often as you think and the possible contaminated fuel
> right out other delivery tanker.
>
> In the first coach which was a 77 Eleganza II with a 403 and Paterson
> Carb and all electric fuel system with mechanic pump removed I ran 2 fuel
> filters. One before the pump in the back and one before the carb in the
> front. I also which was my choice to remove the internal fuel filter in
> the carb. I change the filters in the spring and in the fall. The front
> filter was moved to the back and the back and a new filter was installed in
> the front. Twice a year for us because the coach was used year round with
> trips to Florida or Arizona in the winter. Those of you that store your
> GMC would only need to replace the filters in the spring.
>
> http://www.gmcmhphotos.com/photos/electric-fuel-pump-
> 26amp-3b-filter/p9898.htmloperating
>
> Our currant GMC is a Buskirk Stretch actual length 29.5 foot long. It has
> an MPFI with a low pressure and High pressure pumps located back near the
> fuel selector valves, which were changed recently. The first is a large
> preflight that also is a coalescing filter to remove any water that may get
> loaded from the stations tanks. It then is pumped by the Low Pressure Pump
> (carter P4070) and then to the High Pressure which is our case is a pump
> used by Mercedes 450SEL then the final filter to the fuel rail and returned
> to the tank that in comes out of.
>
> J.R. Wright
> GMC GreatLakerTech Editor
> 78 Buskirk 30' Stretch
> 75 Avion Under Reconstruction
> Michigan
>
>> On Jan 12, 2018, at 8:38 AM, James Hupy wrote:
>> Fuel filters do serve a real purpose. Fuel is not always clean when it
> is
>> delivered to stations, nor are station storage tanks necessarily debris
>> free. Most pumps do not filter fuel either. So, if you rely upon the carb
>> inlet filter exclusively to deliver clean fuel, expect it to require
>> service. Carry spares. If you use an electric auxiliary fuel pump, most
> of
>> them require a pre filter as well.
>> I guess that it comes back to periodic maintenance. Air filters,
> fuel
>> filters, lug nuts, tire pressures, lubrication, oil changes, walk around
> to
>> check lighting, etc. Pretty necessary on 40 year old vehicles.
>> Jim Hupy
>> Salem, Or
>> 78 GMC ROYALE 403
>>
>> On Jan 12, 2018 7:07 AM, "John R. Lebetski"
> wrote:
>>
>> Seems tanks are either operating room clean or nasty. If clean, you
> don't
>> need add-on filters (added fail or fire risk) and if the tanks are nasty
>> due to dirt in filter evidence, they need to be dropped and corrected.
>> --
>> John Lebetski
>> Woodstock, IL
>> 77 Eleganza II
>>
>
>
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Re: [GMCnet] Fuel filters [message #328179 is a reply to message #328176] Fri, 12 January 2018 17:13 Go to previous message
jimk is currently offline  jimk   United States
Messages: 4573
Registered: July 2006
Location: Belmont, CA
Karma: 5
Senior Member
If you have a rubber hose coupling a filter under pressure, your inviting
trouble as we forget that old hose and when it develops a leak, it will
squart and can catch on fire from hot exaust.
Should you placce a filter ahead of the pump, put it right in front of the
pump to avoid vapor lock.

On Fri, Jan 12, 2018 at 12:37 PM, John Wright wrote:

> J.R. Wright
> GMC Great Laker
> GMC Eastern States
> GMCMHI
> TZE Zone Restorations
> 78 Buskirk Custom 30' Stretch
> 75 Avion (Under going Frame up Restoration)
>
>
> On Fri, Jan 12, 2018 at 1:25 PM, John Wright wrote:
>
>> There no such as a clean fuel tank as the fuel being loaded into your
> tank
>> can have contaminates at any time, including the stuff that get loaded
> when
>> the gas station storage tanks are low and haven’t been cleaned lately and
>> that happens not as often as you think and the possible contaminated fuel
>> right out other delivery tanker.
>>
>> In the first coach which was a 77 Eleganza II with a 403 and Paterson
>> Carb and all electric fuel system with mechanic pump removed I ran 2 fuel
>> filters. One before the pump in the back and one before the carb in the
>> front. I also which was my choice to remove the internal fuel filter in
>> the carb. I change the filters in the spring and in the fall. The front
>> filter was moved to the back and the back and a new filter was installed
> in
>> the front. Twice a year for us because the coach was used year round
> with
>> trips to Florida or Arizona in the winter. Those of you that store your
>> GMC would only need to replace the filters in the spring.
>>
>> http://www.gmcmhphotos.com/photos/electric-fuel-pump-
>> 26amp-3b-filter/p9898.htmloperating
>>
>> Our currant GMC is a Buskirk Stretch actual length 29.5 foot long. It has
>> an MPFI with a low pressure and High pressure pumps located back near the
>> fuel selector valves, which were changed recently. The first is a large
>> preflight that also is a coalescing filter to remove any water that may
> get
>> loaded from the stations tanks. It then is pumped by the Low Pressure
> Pump
>> (carter P4070) and then to the High Pressure which is our case is a pump
>> used by Mercedes 450SEL then the final filter to the fuel rail and
> returned
>> to the tank that in comes out of.
>>
>> J.R. Wright
>> GMC GreatLakerTech Editor
>> 78 Buskirk 30' Stretch
>> 75 Avion Under Reconstruction
>> Michigan
>>
>>> On Jan 12, 2018, at 8:38 AM, James Hupy wrote:
>>> Fuel filters do serve a real purpose. Fuel is not always clean when it
>> is
>>> delivered to stations, nor are station storage tanks necessarily debris
>>> free. Most pumps do not filter fuel either. So, if you rely upon the
> carb
>>> inlet filter exclusively to deliver clean fuel, expect it to require
>>> service. Carry spares. If you use an electric auxiliary fuel pump, most
>> of
>>> them require a pre filter as well.
>>> I guess that it comes back to periodic maintenance. Air filters,
>> fuel
>>> filters, lug nuts, tire pressures, lubrication, oil changes, walk
> around
>> to
>>> check lighting, etc. Pretty necessary on 40 year old vehicles.
>>> Jim Hupy
>>> Salem, Or
>>> 78 GMC ROYALE 403
>>>
>>> On Jan 12, 2018 7:07 AM, "John R. Lebetski"
>> wrote:
>>>
>>> Seems tanks are either operating room clean or nasty. If clean, you
>> don't
>>> need add-on filters (added fail or fire risk) and if the tanks are
> nasty
>>> due to dirt in filter evidence, they need to be dropped and corrected.
>>> --
>>> John Lebetski
>>> Woodstock, IL
>>> 77 Eleganza II
>>>
>>
>>
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> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



--
Jim Kanomata
Applied/GMC, Newark,CA
jimk-AT-appliedairfilters-DOT-com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk-AT-appliedairfilters-DOT-com
www.appliedgmc.com
1-800-752-7502
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