| Any thoughts on moving gas fill location back towards the tanks? [message #227489] |
Mon, 28 October 2013 21:37  |
mojoe
Messages: 319
Registered: November 2012
Location: Monroe, NC
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Thinking of moving my gas fill location back towards the tanks. Thinking it may be easier to fill and not have gas smell in the cockpit.
Any thoughts ?
Do they make a door system I could recess into the body panel?
Joe Kemenczky..
1975 Eleganza ll " Odie " 75,000 miles..
"When I was younger, I could remember anything, whether it had happened or not." - Mark Twain.
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| Re: [GMCnet] Any thoughts on moving gas fill location back towards thetanks? [message #227503 is a reply to message #227489] |
Mon, 28 October 2013 22:32  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
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If you have a gas smell in the cockpit after fueling there is a problem with the vent system. If you run a separate vent line up to
as close to the vent line that connects to the fill line you won't have any problems filling.
Manny moved his fill fittings back near the tanks, however, he does not monitor the GMCnet and is FAR to busy building
transmissions, 1 ton front ends, and reaction arm brake systems to do so.
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
AUS '75 Avion - The Blue Streak TZE365V100428
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Joe Kemenczky
Sent: Monday, October 28, 2013 9:38 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Any thoughts on moving gas fill location back towards thetanks?
Thinking of moving my gas fill location back towards the tanks. Thinking it may be easier to fill and not have gas smell in the
cockpit.
Any thoughts ?
Do they make a door system I could recess into the body panel?
--
Joe Kemenczky
1975 Eleganza ll "Odie" 75,000 miles.
Working on complete restoration. In year 2 of a 3 year restoration.
Loving every minute!
Monroe, NC (East of Charlotte).
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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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| Re: [GMCnet] Any thoughts on moving gas fill location back towards the tanks? [message #227536 is a reply to message #227489] |
Tue, 29 October 2013 07:02 |
Jim Bounds
Messages: 842
Registered: January 2004
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The reason you have a fuel smell in the coach is because a circuit in your fuel delivery system is leaking, my suggestion is to drop the tanks and replace your hoses under there. There are many of them.
As far as the fill goes, a properly operating system will pump in @ 35 gallons with descent speed. The system will burp back, wait a minute then pump in more at 1/2 pressure from the pump. If the system is operating properly you will be able to fill pretty well that way, if you cannot go fix it.
The problem is maybe 1/2 the length of the 1 1/4" hose running a distance but the main reason is the side fill into the tank. When you get over 1/4 in the tanks, the fuel in the tanks are pushing back on the fuel coming in. Having the fill not on the top but on the side causes this. You cannot change that so making the system work as good as it can I fell is the best thing. It's not a good idea to throw everything out and try to engineer it yourself, there were some reasonably savy guys that put the deisn together in the first place and with all it's limitations it really is a descent system.
I have seen tanks with a 2 1/2" fill on the top of the tanks but the body had to be lifter 4" for that to occure. The coach was a handicapped shuttle bus and the body was lifter to accommodate the wheel chair lift. That would be some pretty extreme modification to just try and fill the tanks faster. It's human nature when a issue is found to throw out everything and start from the beginning, remember other pretty smart people have already invented that wheel, do you feel 40 years later that there is some new technology that can make the system better?
Make the system all it can be and you might be surprised on how adequite the system actually is but you will have to fix it first and that means more than just replacing a bad part. Take it all apart and put it all back together properly-- it will work well for you.
Jim Bounds
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On Monday, October 28, 2013 11:14 PM, Joe Kemenczky <toyomojoe@live.com> wrote:
Thinking of moving my gas fill location back towards the tanks. Thinking it may be easier to fill and not have gas smell in the cockpit.
Any thoughts ?
Do they make a door system I could recess into the body panel?
--
Joe Kemenczky
1975 Eleganza ll "Odie" 75,000 miles.
Working on complete restoration. In year 2 of a 3 year restoration.
Loving every minute!
Monroe, NC (East of Charlotte).
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GMCnet mailing list
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| Re: [GMCnet] Any thoughts on moving gas fill location back towards the tanks? [message #227556 is a reply to message #227489] |
Tue, 29 October 2013 09:30 |
Jim Miller
Messages: 501
Registered: March 2008
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On Oct 28, 2013, at 10:37 PM, Joe Kemenczky wrote:
> Thinking of moving my gas fill location back towards the tanks. Thinking it may be easier to fill and not have gas smell in the cockpit.
GM would not have produced a product whose design allowed gas fumes to get into an occupied compartment under any circumstances - that is a huge safety issue never mind the customer satisfaction standpoint! If you are getting fumes at fill time then you have a problem in your fill or vent system.
As others have aptly pointed out there is a LOT of hose and tubing in the system and therefore LOTS of opportunity for leaks due to mechanical damage or alcohol-compromised lines.
--Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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| Re: Any thoughts on moving gas fill location back towards the tanks? [message #227590 is a reply to message #227489] |
Tue, 29 October 2013 11:59 |
habbyguy
Messages: 896
Registered: May 2012
Location: Mesa, AZ
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FWIW, I can do a full fill at full nozzle flow, after replacing my fuel and vent lines with ethanol-friendly hoses. That might be partially because my beloved PO installed new body-to-frame rubber spacers (which apparently cause fueling issues when they compress and pinch the vent lines). I just wish the $xx.xx display didn't move with corresponding quickness...
Mark Hickey
Mesa, AZ
1978 Royale Center Kitchen
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| Re: [GMCnet] Any thoughts on moving gas fill location back towards the tanks? [message #227602 is a reply to message #227556] |
Tue, 29 October 2013 13:36 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| Jim Miller wrote on Tue, 29 October 2013 08:30 |
On Oct 28, 2013, at 10:37 PM, Joe Kemenczky wrote:
> Thinking of moving my gas fill location back towards the tanks. Thinking it may be easier to fill and not have gas smell in the cockpit.
GM would not have produced a product whose design allowed gas fumes to get into an occupied compartment under any circumstances - that is a huge safety issue never mind the customer satisfaction standpoint! If you are getting fumes at fill time then you have a problem in your fill or vent system.
As others have aptly pointed out there is a LOT of hose and tubing in the system and therefore LOTS of opportunity for leaks due to mechanical damage or alcohol-compromised lines.
--Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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Even modern vehicles can be "overfilled". Even though the GMC has a crude vapor separator in the system, constant clicking of the fuel nozzle can get fuel into the vapor canister. If you work really hard on trying to get the last drop of fuel into the vehicle you can create a fume issue.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Any thoughts on moving gas fill location back towards the tanks? [message #227702 is a reply to message #227560] |
Wed, 30 October 2013 06:49 |
94nubble
Messages: 275
Registered: July 2011
Location: Chesapeake VA
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I used ethanol-friendly hoses and yes it fills fast and easy. I haven't put a stop watch to it but I don't have the nozzle kicking off every five seconds. The room I lost inside is negligible. I wont get that extra bottle of dish soap under the cabinet.
The reason I moved the fill was to get rid of the over fill. I figured that at least a gallon or two would be sloshing around in there before enough miles of use drains it down below the tank entry. That kind of washing machine action would eat any kind of hose relatively quick and the fume pressure that's created could vent anywhere including back through the tanks causing a nasty burp of fuel forced out at any weak spot in the system.
| Matt Colie wrote on Tue, 29 October 2013 10:55 |
Nobody else has mentioned that he also went to almost all (not the vapor vent and he may regret that) over the tanks and has radically changed the hydrology of the fill system? That later may not be for the worse, but I would like to hear from him how long a fill takes now.
Matt
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Tom McManus
1977 Royale
Chesapeake VA
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