Fuel Filter removal issues

R

robert peesel

New member
Jan 7, 2011
395
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0
Howdy all,
I am finally able to put my home renovations aside and work on my GMC. Last year during my cross country trip I lost power as I neared my new home in
Colorado. It was suggested that I replace my fuel filter.

Well, I tried to remove the filter today and was unable to loosen the nut holding the filter in. Picture is here: http://imgur.com/yYqZwLw . I have
soaked it in penetrating oil, tried a flare nut wrench with a vise grip applied to the end to squeeze the wrench around the nut and then with the vise
grips around the nut. I have been unable to loosen the nut, although the larger nut on the carburetor side is lose.

Any thoughts on how to get this lose?

Robert
--
Robert Peesel

1976 Royale 26'

Side Dry Bath

Morrison, Colorado
 
A small pipe wrench usually works with a back up 1" wrench holding the housing.

Howdy all,
I am finally able to put my home renovations aside and work on my GMC. Last year during my cross country trip I lost power as I neared my new home in
Colorado. It was suggested that I replace my fuel filter.

Well, I tried to remove the filter today and was unable to loosen the nut holding the filter in. Picture is here: http://imgur.com/yYqZwLw . I have
soaked it in penetrating oil, tried a flare nut wrench with a vise grip applied to the end to squeeze the wrench around the nut and then with the vise
grips around the nut. I have been unable to loosen the nut, although the larger nut on the carburetor side is lose.

Any thoughts on how to get this lose?

Robert[/quote]

--
C. Boyd
76 Crestmont
East Tennessee
 
Yes. Apply two pipe wrenches, one top the nut in question, one to the filter housing nut. It's al;ready scarred on both, so you're out nothing.

==johnny

--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
I don't think I'd try the Red Wrench on a fuel line, but you might gain a bit by pouring boiling water over it for a few minutes before you lay the
wrenches to it.

--johnny

--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
Robert,

You noted that the connection (filter housing) at the carb is loose; it is very important NOT to screw up that connection because if
you do the repair process can be costly and time consuming. Considering that if I were you I'd cut the metal line and remove the
filter housing from the carb.

Put the filter housing in a vise and use a six point box wrench to get the tube flare nut loose. You can heat the nut with a flame
now.

Buy one of these to put it back together as it will make your life easier whenever you want to check the filter:

http://www.appliedgmc.com/prod.itml/icOid/853

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

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Robert Peesel
Sent: Monday, October 03, 2016 11:44 AM
To: gmclist
Subject: [GMCnet] Fuel Filter removal issues

Howdy all,
I am finally able to put my home renovations aside and work on my GMC. Last year during my cross country trip I lost power as I
neared my new home in Colorado. It was suggested that I replace my fuel filter.

Well, I tried to remove the filter today and was unable to loosen the nut holding the filter in. Picture is here:
http://imgur.com/yYqZwLw. I have soaked it in penetrating oil, tried a flare nut wrench with a vise grip applied to the end to
squeeze the wrench around the nut and then with the vise grips around the nut. I have been unable to loosen the nut, although the
larger nut on the carburetor side is lose.

Any thoughts on how to get this lose?

Robert
--
Robert Peesel

1976 Royale 26'

Side Dry Bath

Morrison, Colorado

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Yes, piling on here, but be especially careful of the carb body! The pump to carb line and the carb fitting that houses the filter can both be
replaced. Screw up the threads in the float bowl (main body) and you are looking at carburetor replacement.
--
Chris Geils - Twin Cities
1978 26' Kingsley w/ very few mods; Headers, Progressive Dynamics 9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, 49k mi
 
will pile on a little more.

order up one of the flexable lines:
http://www.appliedgmc.com/prod.itml/icOid/853

cut that line off, remove the carb from the engine and take it to the bench, so you do not screw up threads into the carb.

the flexible line will make installation much easier forever into the future, and you should replace that line anyhow, so you do not have this problem
in the figure.

--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/
 
Bob,
Did you advance your timing? You increased your altitude by what 7,000
feet.

> will pile on a little more.
>
> order up one of the flexable lines:
> http://www.appliedgmc.com/prod.itml/icOid/853
>
> cut that line off, remove the carb from the engine and take it to the
> bench, so you do not screw up threads into the carb.
>
> the flexible line will make installation much easier forever into the
> future, and you should replace that line anyhow, so you do not have this
> problem
> in the figure.
>
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
 
Bruce,
No, I have not adjusted the timing for the new altitude yet. The GMC was running great all the way across the country until I got just west of
Denver. About the time I got to rt 70 and 470 the speed dropped to about 15 mph. I was able to get to the parking place in Morrison where it sits
right now. It was suggested that it sounded like a fuel filter problem as it occurred so quickly.

My new home is in Conifer, so I am trying to get it from Morrison to Conifer so that I can spend more time working on it and getting it adjusted to
the altitude.

I am open to any and all solution suggestions!

Bob
--
Robert Peesel

1976 Royale 26'

Side Dry Bath

Morrison, Colorado
 
The fuel filter just before your mechanical fuel pump if you are still running one as Rob suggest is probably on of the best addition you can do to your fuel system. I also like Rob did not run a filter in the carb for 10 years. I went to an all electric fuel system in the spring of 2002. With the all electric fuel system it uses 2 filters, one after the selector valve, just before the fuel pump. The second filter is in the same location as Rob’s picture. Each spring I take the front filter and put it in the back and put a new filter in the front. If you can plug up the pre pump filter then you have serious issues with your fuel tank and lines before the filter.

http://www.gmcmhphotos.com/photos/electric-fuel-pump-26amp-3b-filter/p7403.html
http://www.gmcmhphotos.com/photos/electric-fuel-pump-26amp-3b-filter/p7402.html

For those of you that would like to look at the fuel system including the control wiring the album is here:

http://www.gmcmhphotos.com/photos/g3657-electric-fuel-pump-26amp-3b-filter.html

This fuel delivery system worked well in the years we used the coach up to 2011 when the coach was sold.

Just what I did, your result can vary.

Regards,

JR Wright
GMC Great Laker MHC
GMC Eastern States Charter Member
GMCGL Tech Editor
GMCMI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan

>
> Install a filter here and you won't need them:
>
> http://www.gmcmhphotos.com/photos/aa-miscellaneous-photos/p54750-fuel-pump-inlet-filter.html
>
> Regards,
> Rob M.
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: Tony Cook
>
> I always keep a few Qjet filters in the glove box
>
> --
> Tony Cook
>
>
 
One time I moved a coach from California to Indiana. It had a large Wix filter just before the pump and the one in the carb. On the first day out
the Wix one before the fuel pump clogged. I replaced it with a Purolator one. The second day the one in the carb clogged. The third day the one
before the pump clogged again and I replaced it with one from CarQuest. The 4th day the one in the carb clogged again. I went through 6 filters (3
of each) on that trip and delivered the coach with 2 more spares.

My point is that the fuel filter before before the pump did not trap everything and the second one small one in the carb got the stuff that the first
one missed. The stuff we were catching in that coach was rust from the tanks.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Ken,

I agree adding a filter up stream of the carb filter will not work 100% if you're moving a coach that has been sitting around with
the tanks rusting.

The fuel pump outlet filter needs to be finer than the carb filter.

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

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

One time I moved a coach from California to Indiana. It had a large Wix filter just before the pump and the one in the carb. On
the first day out the Wix one before the fuel pump clogged. I replaced it with a Purolator one. The second day the one in the carb
clogged. The third day the one before the pump clogged again and I replaced it with one from CarQuest. The 4th day the one in the
carb clogged again. I went through 6 filters (3 of each) on that trip and delivered the coach with 2 more spares.

My point is that the fuel filter before before the pump did not trap everything and the second one small one in the carb got the
stuff that the first one missed. The stuff we were catching in that coach was rust from the tanks.
--
Ken
 
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