Fuel leak!
Fuel leak!
Hi there! So today I smelled fuel while driving home from work. Opened the hood and there is a leak happening at a connection where a black rubber/plastic elbow joint goes into the fuel rail. Any tips?
2005 Pontiac Bonneville SE
- harofreak00
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Re: Fuel leak!
Probably a failed o-ring. You'll have to relieve the pressure in the line by pressing on the schrader valve with a rag over top. Squeeze the plastic lock to release the clip and pull the line off the rail. Inspect for o-ring damage and replace as needed.
Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 57k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 115k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 280k | Official Bonneville Hauler

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 57k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 115k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 280k | Official Bonneville Hauler
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96 SSEi
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Re: Fuel leak!
hi, glad you found the issue before it became a disaster!!!
would be wise to depressurize the fuel system before you start disconnecting stuff. put rag under leak, start car and pull the fuel pump fuse - car will run and cut when all fuel is out of rail without pump forcing more fuel into system. Or, you can put rag around valve on fuel rail and press centre pin - gas will spray out so protect eyes and dont smoke weeds.....
sorry, dont know about line
would be wise to depressurize the fuel system before you start disconnecting stuff. put rag under leak, start car and pull the fuel pump fuse - car will run and cut when all fuel is out of rail without pump forcing more fuel into system. Or, you can put rag around valve on fuel rail and press centre pin - gas will spray out so protect eyes and dont smoke weeds.....
sorry, dont know about line
poverty forces one to do unorthodox things
2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am
2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am
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MKMike
- Posts like an L67

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1998 SE
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2002 SSEI
Re: Fuel leak!
I had trouble finding the right size o rings, so I bought the Dorman fitting, removed its o rings and installed them on the car.
The fuel supply line from the tank is 3/8 and the return line is 5/16
Another option is to buy the Dorman nylon line with the fitting already installed and use a Dorman nylon to nylon quick connect fitting to connect it to the existing nylon line.
I imagine it would be easier to splice in a nylon section or replace the o rings than to replace the entire line--but have not replaced an entire line, so this is speculation.
The fuel supply line from the tank is 3/8 and the return line is 5/16
Another option is to buy the Dorman nylon line with the fitting already installed and use a Dorman nylon to nylon quick connect fitting to connect it to the existing nylon line.
I imagine it would be easier to splice in a nylon section or replace the o rings than to replace the entire line--but have not replaced an entire line, so this is speculation.
- agrazela
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98 Lesabre, Retired - Location: San Diego, CA
Re: Fuel leak!
O rings -011 for 5/16" and -012 for 3/8", ideally viton, should do it. I think there are two o rings per fitting.
Let me know if you want some, got plenty left over from fixing fuel fittings

Let me know if you want some, got plenty left over from fixing fuel fittings

2004 Buick Lesabre Limited, Gran Touring
Bone Stock
1998 Buick Lesabre Limited, Gran Touring
Retired
Bone Stock
1998 Buick Lesabre Limited, Gran Touring
Retired
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ron350
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Re: Fuel leak!
Yep there are two o-rings in each fuel line connector and each o-ring is separated by a plastic spacer. Like Agrazela said you only need two viton o-rings for each fuel line connector that is leaking.
The o-ring’s are not easy to replace but with a few tools, steady hands and good lighting it can be done.
I have replaced several o-rings and came up with some tools that make it possible. Here are several sizes of round wooden dowels to help install the o-ring.
Also have a modified stainless steel pick that has a 90 * end with a .040 end with a rounded tip. You can use this to remove the o-rings and position the plastic separator without scratching the o-rings or the plastic. You also use the pick to pull the o ring back when it goes past its grove.

The o-ring’s are not easy to replace but with a few tools, steady hands and good lighting it can be done.
I have replaced several o-rings and came up with some tools that make it possible. Here are several sizes of round wooden dowels to help install the o-ring.
Also have a modified stainless steel pick that has a 90 * end with a .040 end with a rounded tip. You can use this to remove the o-rings and position the plastic separator without scratching the o-rings or the plastic. You also use the pick to pull the o ring back when it goes past its grove.

Re: Fuel leak!
Thanks for all of the help! I purchased the Dorman kit (part # 800-059) and it did the job. The splicer piece was a pain in the butt, but it all worked out. I appreciate the info!
2005 Pontiac Bonneville SE
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MKMike
- Posts like an L67

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1998 SE
2001 SSEI
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Re: Fuel leak!
Glad you got it fixed.
Thanks for posting the result.
IMHO, the Dorman repair and replacement parts are great; They save time and make some parts that no one else does.
I've used these Dorman quick connects which are very easy to use and work well, so long as you ensure the hose ends are pushed in all the way:
http://www.rockauto.com/en/moreinfo.php ... 31&jsn=237
http://www.rockauto.com/en/moreinfo.php ... 35&jsn=233
FWIW, cutting the nylon hose with a single edged razor blade works best.
Thanks for posting the result.
IMHO, the Dorman repair and replacement parts are great; They save time and make some parts that no one else does.
I've used these Dorman quick connects which are very easy to use and work well, so long as you ensure the hose ends are pushed in all the way:
http://www.rockauto.com/en/moreinfo.php ... 31&jsn=237
http://www.rockauto.com/en/moreinfo.php ... 35&jsn=233
FWIW, cutting the nylon hose with a single edged razor blade works best.


