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[GMCnet] Replacing Rubber Fuel & Tranny Hoses [message #62413]

Fri, 30 October 2009 12:02

Jim White[1]

Messages: 144
Registered: September 2008

Karma: 0

Senior Member

It seems to me that rubber hoses containing fuel, ATF and oil represent
a potential failure point and fire hazard, so I am planning to replace
all except the ones on top of the fuel tanks. I'll do those later.
Anyone done this? Anyone document the length and inside diameter of
each? What is the most reasonable source for replacement braided hose
that doesn't require a 2nd mortgage?
Thanks-
Jim "Doc" White
Wintergreen, VA
75 GMC Stretch
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Re: [GMCnet] Replacing Rubber Fuel & Tranny Hoses [message #62415 is a reply to message #62413]

Fri, 30 October 2009 12:16

Gary Worobec

Messages: 867
Registered: May 2005

Karma: -1

Senior Member

Jim, there is a ton of stuff on the photo site including drawings, pictures,
specs etc, You might check that out as well. Rick Denny I believe also did
an excellent documentation on using hardlines on his tanks.

Thanks

Gary and Joanne Worobec
1973 GMC Glacier

----- Original Message -----
From: "Jim White" <jameswwhite@cyberwind.net>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, October 30, 2009 10:02 AM
Subject: [GMCnet] Replacing Rubber Fuel & Tranny Hoses

> It seems to me that rubber hoses containing fuel, ATF and oil represent
> a potential failure point and fire hazard, so I am planning to replace
> all except the ones on top of the fuel tanks. I'll do those later.
> Anyone done this? Anyone document the length and inside diameter of
> each? What is the most reasonable source for replacement braided hose
> that doesn't require a 2nd mortgage?
> Thanks-
> Jim "Doc" White
> Wintergreen, VA
> 75 GMC Stretch
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: [GMCnet] Replacing Rubber Fuel & Tranny Hoses [message #62416 is a reply to message #62413]

Fri, 30 October 2009 12:21

powerjon

Messages: 2446
Registered: January 2004

Karma: 5

Senior Member

Jim,
Can you spell second mortgage! Seriously check out:

< http://www.jegs.com/webapp/wcs/stores/servlet/KeywordSearchCmd?D=braded+hose&langId=-1&Ntk=all&catalogId=10002&Nty=1&No=12&Ne= 1147708&Ntt=braded+hose&searchType=KeywordSearch&Dx=mode%2Bmatchallpartial&storeId=10001&Ntx=mode%2Bmatchallpartial&N=42949665 92&redirect=false
>
or
http://tinyurl.com/yz9jv7f

Also check their hose fittings

http://www.summitracing.com/search/Department/Fittings-Hoses/

http://www.russellperformance.com/mc/adapt_fit/fuel.shtml

http://www.russellperformance.com/mc/hose_ends/main.shtml

Use the same size braided hose that you would in rubber.

http://www.russellperformance.com/mc/hose/main.shtml

J.R. Wright
GMC GreatLaker
TZE Zone Restorations
77 Eleganza Custom (For Sale)
1975 Avion (Under Reconstruction)
Michigan

On Oct 30, 2009, at 1:02 PM, Jim White wrote:

> It seems to me that rubber hoses containing fuel, ATF and oil
> represent
> a potential failure point and fire hazard, so I am planning to replace
> all except the ones on top of the fuel tanks. I'll do those later.
> Anyone done this? Anyone document the length and inside diameter of
> each? What is the most reasonable source for replacement braided hose
> that doesn't require a 2nd mortgage?
> Thanks-
> Jim "Doc" White
> Wintergreen, VA
> 75 GMC Stretch
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan

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Re: [GMCnet] Replacing Rubber Fuel & Tranny Hoses [message #62417 is a reply to message #62413]

Fri, 30 October 2009 12:21

Gary Casey

Messages: 448
Registered: September 2009

Karma: 0

Senior Member

You are correct in that either fuel or oil leaks can cause fires. Actually, oil is possibly a greater fire hazard - spray fuel and a red-hot exhaust manifold and it probably won't catch fire. Spray oil on the same manifold and it will very likely catch fire because the ignition temperature is much lower than gasoline. But there is a common belief that anything with a stainless cover is somehow better. The braided jacket is primarily for abrasion protection regardless of what the hose underneath is made of. The higher grade aircraft hoses are teflon and these have a very long long life - certified for indefinite use in aircraft while all rubber hoses are time-limited to 5 years. If the base hose is rubber it could likely degrade without you being able to see it. A good idea for any hose that is anywhere near an exhaust system would be to put a fire sleeve over it. This does 2 things - it keeps the hose itself from burning if exposed to fire (like
from an exhaust leak) and if the hose inside leaks it just drips from the end instead of potentially spraying from the leak. Yes, steel lines would be a good idea, but a lot of work. Thanks for reminding me to take a look at mine.
Gary

________________________________
From: Jim White <jameswwhite@cyberwind.net>
To: gmclist@temp.gmcnet.org
Sent: Fri, October 30, 2009 11:02:55 AM
Subject: [GMCnet] Replacing Rubber Fuel & Tranny Hoses

It seems to me that rubber hoses containing fuel, ATF and oil represent
a potential failure point and fire hazard, so I am planning to replace
all except the ones on top of the fuel tanks. I'll do those later.
Anyone done this? Anyone document the length and inside diameter of
each? What is the most reasonable source for replacement braided hose
that doesn't require a 2nd mortgage?
Thanks-
Jim "Doc" White
Wintergreen, VA
75 GMC Stretch
_______________________________________________
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List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: [GMCnet] Replacing Rubber Fuel & Tranny Hoses [message #62431 is a reply to message #62413]

Fri, 30 October 2009 13:36

tmaki

Messages: 200
Registered: September 2005

Karma: 0

Senior Member

On Fri, 30 Oct 2009 10:02:55 -0700, Jim White <jameswwhite@cyberwind.net>
wrote:

> I am planning to replace
> all except the ones on top of the fuel tanks. I'll do those later.
> Anyone done this?

I re-did my tanks and lines this summer. I used short lengths of SAE R9
(3/8") hose to connect from the
sending units to 2' pieces of 3/8" steel tubing, and then to connect to
3/8" steel tubing along the frame
rail to the vent tube (new 5/8" steel tubing though an adapter fitting)
and the selector valve/electric
pump cluster. New 3/8" steel line from there (connected with R9 hose) to
just inside the wheel well and R9 hose to connect to steel line to engine
fuel pump. Stainless steel clamps on all. I supported the steel lines over
the tanks with a rubber sealing putty found in the electrical section of
Home Depot or Lowe's. Gives a little cushioning effect and keeps the steel
tubes from tapping on the tops of the tanks (not that they would anyways).

I sprayed rubberized rust preventive on all steel surfaces to reduce the
likelihood of rust forming.
Since the originals lasted 36 years without any major rust problems, I'm
confident that there won't be
a problem in the future as I expect it to unfold.

I used the R9 hose in places where it is easy to replace when necessary.
If I decide to replace the short hose
pieces on the tops of the tanks, I'll go through the floor above. Although
dropping the tanks isn't that big
a deal now that I've done it.

I think I used 6' of R9 hose to make the short connector pieces and some
other pieces. $5/ft. is okay for that
length. Steel tubing is quite reasonable for the longer, straighter runs.
Cut, de-burr, dimple, bend, as required.

Toby Maki
'73 Glacier 230
Riverside, CA
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Re: [GMCnet] Replacing Rubber Fuel & Tranny Hoses [message #62459 is a reply to message #62413]

Fri, 30 October 2009 17:04

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Jim,

Forget the braided stainless steel hose it's too expensive.

You can use solid steel tubing with these fittings:

http://www.mcmaster.com/#51875k23/=4afpxi

You'll have to cut the hose retaining beads off the ends of the tubes on the
sending units to use these fittings.

I HAVE verified that the distance between the two tube that come out of the
sending unit are far enough apart to use these fittings.

If you incorporate the steps below I can't see why you'd ever have to drop
your tanks again.

1) fit solid steel lines from the sending units to the side of the tank
2) remove the socks on the sending units
3) fit two of these Racor 250 micro filters externally

http://www.parker.com/portal/site/PARKER/menuitem.de7b26ee6a659c147cf2671023
7ad1ca/?vgnextoid=fcc9b5bbec622110VgnVCM10000032a71dacRCRD&vgnextfmt=default
&vgnextdiv=687630&vgnextcatid=2699978&vgnextcat=MARINE 025-RAC-01&Wtky=

http://tinyurl.com/yzzask5

Brass fittings and steel lines would work fine, if you want to have a bullet
proof system use stainless steel fittings and lines!

In case you're wondering, no I didn't do this to Double Trouble or The Blue
Streak, I only figured it out that the fittings would work when I pulled the
tanks and changed the lines last year at the COOP. Yes, I have bought all
the parts to do this to The Blue Streak.

Regards,
Rob Mueller
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 Jim White
Sent: Saturday, 31 October 2009 4:03 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Replacing Rubber Fuel & Tranny Hoses

It seems to me that rubber hoses containing fuel, ATF and oil represent
a potential failure point and fire hazard, so I am planning to replace
all except the ones on top of the fuel tanks. I'll do those later.
Anyone done this? Anyone document the length and inside diameter of
each? What is the most reasonable source for replacement braided hose
that doesn't require a 2nd mortgage?
Thanks-
Jim "Doc" White
Wintergreen, VA
75 GMC Stretch
_______________________________________________
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List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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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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