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| Re: [GMCnet] Fuel filters [message #328179 is a reply to message #328176] |
Fri, 12 January 2018 17:13  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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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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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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