Home » Public Forums » GMCnet » Fuel Leak in LH Rear Wheel Well. (Somewhat Urgent.)
| Fuel Leak in LH Rear Wheel Well. [message #206003] |
Fri, 26 April 2013 13:46  |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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What is the small box in the LH rear wheel well that has 2 fuel lines running to it? The box has developed a leak and it drips on the LH front wheel bogie brake and will be a fire hazard. Are replacements readily available? We are 2 hours from departure on a long-planned trip. Can the box be bypassed?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
[Updated on: Fri, 26 April 2013 13:47] Report message to a moderator |
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| Re: Fuel Leak in LH Rear Wheel Well. [message #206009 is a reply to message #206003] |
Fri, 26 April 2013 14:26  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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they are available. not sure about locally. Jim Bounds, Jeff Sirim, and Jim K I believe have them.
I think some corvettes use the same one. so there might be some local.
if you do not fill the tanks all the way, it might not leak.
there might be some alternatives too to get by.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Fuel Leak in LH Rear Wheel Well. [message #206010 is a reply to message #206007] |
Fri, 26 April 2013 14:26 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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| WD0AFQ wrote on Fri, 26 April 2013 12:24 |
Yes they are. Depending on where you are headed, Jim K. can ship you one. The ball sticks and lets gas run out when you fill the tanks. Id drive it.
Dan
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No, we're headed to the mountains and I am the camp leader. Any part numbers for a local pickup? I'll send Jim something nice to make up for it.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Fuel Leak in LH Rear Wheel Well. [message #206041 is a reply to message #206003] |
Fri, 26 April 2013 18:51 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Randy,
If you are member of GMCMI, the parts index on page 19, column 1 second item list the correct part number for the fuel separator. Jim K has them also.
http://www.appliedgmc.com/prod.itml/icOid/792
As long as you do not fill the tanks to the top then it should not be an issue.
JR Wright
78 Buskirk Stretch
Michigan
On Apr 26, 2013, at 2:46 PM, Randy <Acrosport2@hotmail.com> wrote:
>
>
> What is the small box in the LH rear wheel well that has 2 fuel lines running to it? The box has developed a leak and it drips on the LH front wheel bogie brake and will be a fire hazard. Are replacements readily available? We are 2 hours from departure on a long-planned trip. Can the box be bypassed?
> --
> Randy
> 1973 26' Painted Desert
> Ahwatukee (Phoenix) AZ
>
>
> _______________________________________________
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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: Fuel Leak in LH Rear Wheel Well. [message #206075 is a reply to message #206010] |
Fri, 26 April 2013 23:15 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| Luvn737s wrote on Fri, 26 April 2013 13:26 |
| WD0AFQ wrote on Fri, 26 April 2013 12:24 |
Yes they are. Depending on where you are headed, Jim K. can ship you one. The ball sticks and lets gas run out when you fill the tanks. Id drive it.
Dan
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No, we're headed to the mountains and I am the camp leader. Any part numbers for a local pickup? I'll send Jim something nice to make up for it.
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This is a common Corvette part depending on where you are and how desperate you are. Yes this will spurr all kinds of "support our suppliers" kind of stuff but sometimes you need to do what you need to do.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Fuel Leak in LH Rear Wheel Well. [message #206094 is a reply to message #206003] |
Sat, 27 April 2013 08:26 |
PettyVTX
Messages: 363
Registered: April 2011
Location: Winder Ga.
Karma: 1
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Not to change the subject about leaking But If the seperator is clogged or stuck will that cause slow filling of gas? Ive checked my vent line or shutoff line that runs to the filler neck and its clear but filling takes 3 times longer than it should only running the nozzle at really slow. I didnt think to check the seperator. Maybe something for Bean Station?
Ex Avion now looking for a 23'
Jeep Wrangler Towd
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| Re: Fuel Leak in LH Rear Wheel Well. [message #206108 is a reply to message #206003] |
Sat, 27 April 2013 09:48 |
PettyVTX
Messages: 363
Registered: April 2011
Location: Winder Ga.
Karma: 1
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Senior Member |
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Well that figures. I was hoping for a quick fix. No need to drop the tanks for that right now. I wonder if we can cut topside inspection holes in our Avions? Jusk askin cuz we Avions are special. (with the ski hump)
Ted
Ex Avion now looking for a 23'
Jeep Wrangler Towd
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| Re: Fuel Leak in LH Rear Wheel Well. [message #206111 is a reply to message #206094] |
Sat, 27 April 2013 10:17 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| PettyVTX wrote on Sat, 27 April 2013 06:26 |
Not to change the subject about leaking But If the seperator is clogged or stuck will that cause slow filling of gas? Ive checked my vent line or shutoff line that runs to the filler neck and its clear but filling takes 3 times longer than it should only running the nozzle at really slow. I didnt think to check the seperator. Maybe something for Bean Station?
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Ted,
Shortly after posting the following photo of my fuel line project, I got a call from a concerned GMCer who told me I had the hose configured wrong. He said it needs to maintain a downhill flow to the tanks, and the way I had it, it would form a trap that would fill with fuel, causing slow filling.
http://www.gmcmhphotos.com/photos/gas-tank-fuel-line-project-6-10/p34771-gas-tank-clean-up-fuel.html
It didn't take me long to figure out the reasoning behind this hypothesis, and that he was right. I went out and changed it to this:
http://www.gmcmhphotos.com/photos/gas-tank-fuel-line-project-6-10/p34774-gas-tank-clean-up-fuel-line-replacement.html
I'm not saying that is your problem, but it is easy to check out. Just pull the left side fender liner and it is easily accessible from there.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Fuel Leak in LH Rear Wheel Well. [message #206114 is a reply to message #206111] |
Sat, 27 April 2013 10:49 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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And that small a difference in slope caused the problem?
Did you simply cut off about an inch of hose and refasten
it lower on the vertical pipe?
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
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> To: gmclist@temp.gmcnet.org
> From: carljr3b@yahoo.com
> Date: Sat, 27 Apr 2013 10:17:23 -0500
> Subject: Re: [GMCnet] Fuel Leak in LH Rear Wheel Well.
>
>
>
> PettyVTX wrote on Sat, 27 April 2013 06:26
> > Not to change the subject about leaking But If the seperator is clogged or stuck will that cause slow filling of gas? Ive checked my vent line or shutoff line that runs to the filler neck and its clear but filling takes 3 times longer than it should only running the nozzle at really slow. I didnt think to check the seperator. Maybe something for Bean Station?
>
>
>
> Ted,
>
> Shortly after posting the following photo of my fuel line project, I got a call from a concerned GMCer who told me I had the hose configured wrong. He said it needs to maintain a downhill flow to the tanks, and the way I had it, it would form a trap that would fill with fuel, causing slow filling.
>
> http://www.gmcmhphotos.com/photos/gas-tank-fuel-line-project-6-10/p34771-gas-tank-clean-up-fuel.html
>
> It didn't take me long to figure out the reasoning behind this hypothesis, and that he was right. I went out and changed it to this:
>
> http://www.gmcmhphotos.com/photos/gas-tank-fuel-line-project-6-10/p34774-gas-tank-clean-up-fuel-line-replacement.html
>
> I'm not saying that is your problem, but it is easy to check out. Just pull the left side fender liner and it is easily accessible from there.
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
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| Re: [GMCnet] Fuel Leak in LH Rear Wheel Well. [message #206123 is a reply to message #206114] |
Sat, 27 April 2013 12:10 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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| k2gkk wrote on Sat, 27 April 2013 08:49 |
And that small a difference in slope caused the problem?
Did you simply cut off about an inch of hose and refasten
it lower on the vertical pipe?
> To: gmclist@temp.gmcnet.org
> From: carljr3b@yahoo.com
> Date: Sat, 27 Apr 2013 10:17:23 -0500
> Subject: Re: [GMCnet] Fuel Leak in LH Rear Wheel Well.
>
>
>
> PettyVTX wrote on Sat, 27 April 2013 06:26
> > Not to change the subject about leaking But If the seperator is clogged or stuck will that cause slow filling of gas? Ive checked my vent line or shutoff line that runs to the filler neck and its clear but filling takes 3 times longer than it should only running the nozzle at really slow. I didnt think to check the seperator. Maybe something for Bean Station?
>
>
>
> Ted,
>
> Shortly after posting the following photo of my fuel line project, I got a call from a concerned GMCer who told me I had the hose configured wrong. He said it needs to maintain a downhill flow to the tanks, and the way I had it, it would form a trap that would fill with fuel, causing slow filling.
>
> http://www.gmcmhphotos.com/photos/gas-tank-fuel-line-project-6-10/p34771-gas-tank-clean-up-fuel.html
>
> It didn't take me long to figure out the reasoning behind this hypothesis, and that he was right. I went out and changed it to this:
>
> http://www.gmcmhphotos.com/photos/gas-tank-fuel-line-project-6-10/p34774-gas-tank-clean-up-fuel-line-replacement.html
>
> I'm not saying that is your problem, but it is easy to check out. Just pull the left side fender liner and it is easily accessible from there.
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
_______________________________________________
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Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Mac,
There WAS on problem. After receiving the phone call from Forrest (within hours of posting the photo), I corrected the hose routing before filling up with gas. What he said made sense (that the low spot in the hose would fill up with gas, preventing proper venting while filling the gas tanks), so I fixed the (potential?) problem right away.
Yes, I simply removed one end of the hose, cut a couple inches off, and re-attached it so that it had positive slope to the tanks. If I hadn't taken care of it, and I started having trouble filling with gas, I would have wondered why.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Fuel Leak in LH Rear Wheel Well. [message #206132 is a reply to message #206123] |
Sat, 27 April 2013 13:10 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| k2gkk wrote on Sat, 27 April 2013 08:49 |
And that small a difference in slope caused the problem?
Did you simply cut off about an inch of hose and refasten it lower on the vertical pipe?
|
| Carl S. wrote on Sat, 27 April 2013 13:10 |
Mac,
There WAS on problem. After receiving the phone call from Forrest (within hours of posting the photo), I corrected the hose routing before filling up with gas. What he said made sense (that the low spot in the hose would fill up with gas, preventing proper venting while filling the gas tanks), so I fixed the (potential?) problem right away.
Yes, I simply removed one end of the hose, cut a couple inches off, and re-attached it so that it had positive slope to the tanks. If I hadn't taken care of it, and I started having trouble filling with gas, I would have wondered why.
|
Mac and Carl,
That dip in the fill vent should not have been a problem. There should be no solid fuel in that vent when fueling unless you have pressed the tanks (not advised for many reasons).
The problem is that the foaminess of crapahol sold now as motorfuel was never considered in the system design. This now becomes a big issue because the dynamics of the hydrology of the system is such that the rear (aka main) tank will always fill first. When it is nearly full of crapahol, the foamy fuel pushing out now blocks the vent of the auxiliary (aka front) tank. This means that now the air/vapor coming out of the forward tank has to push that fuel foam from the main tank all the way out of the vent line (often shutting off the fill nozzle in the process) to allow fueling of the auxiliary tank to continue.
After studying this problem for just a couple of years and making several false starts at cures, I settled on the relocation of the T in the vent system to as close to the cab floor as I could make it.
It does work as noted in the prior post.
You might read "Recommending High T" 29 July 2012
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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