C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Gas line leaking between tanks ??????

Thread Tools
 
Search this Thread
 
Old Nov 14, 2007 | 12:54 PM
  #1  
vette3800's Avatar
vette3800
Thread Starter
Instructor
15 Year Member
 
Joined: Dec 2006
Posts: 187
Likes: 6
From: Chapin SC
Default Gas line leaking between tanks ??????

MY 2004 vette with 11k miles is in the shop now running up a 10.4 hour labor charge due to the transfer line between the two gas tanks leaking. Got to drop the tanks, rear end, transmission, and also slightly lower and angle the motor to repair it. Has anyone ever heard of this??? My mechanic has tried to get some help from GM but they said NO -out of warranty since it was made in Jan 04.
Reply
Old Nov 14, 2007 | 01:36 PM
  #2  
mike348's Avatar
mike348
Burning Brakes
 
Joined: Apr 2004
Posts: 908
Likes: 0
From: Ponchatoula la.
Default

My 04 had the same leak (gas was a steady stream) 900 miles from home. I heard that GM went to a metal cross over line on 04 cars. I had GMPP cover mine. Kansas City dealer said the tank nipple that the hose was connected to was out of round. I filed a report to NHTSA on this.

Last edited by mike348; Nov 14, 2007 at 05:50 PM.
Reply
Old Nov 14, 2007 | 02:18 PM
  #3  
jirasvet's Avatar
jirasvet
Burning Brakes
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jul 2007
Posts: 881
Likes: 2
From: hill billy hell
Default

There have been posts on the problem you are describing about the 04
fuel system
http://forums.corvetteforum.com/show....php?t=1746325

Here is a detailed description of your fuel system
http://www.corvetteactioncenter.com/...el+Tank+System
Reply
Old Nov 14, 2007 | 05:09 PM
  #4  
runamuk's Avatar
runamuk
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Default

Most of the leaks I've heard of are the tank leaking where the crossover pipe hooks up, This is the first time I've heard of the crossover pipe leaking.

By the way, the pipe comes out before the tanks and if the crossover pipe is the only thing that is leaking then there is no reason to pull either of the fuel tanks.
Reply
Old Nov 14, 2007 | 10:08 PM
  #5  
vette3800's Avatar
vette3800
Thread Starter
Instructor
15 Year Member
 
Joined: Dec 2006
Posts: 187
Likes: 6
From: Chapin SC
Default

I think it is actually leaking at the connection on the left tank.
Reply
Old Nov 14, 2007 | 10:17 PM
  #6  
108C6's Avatar
108C6
Racer
10 Year Member
 
Joined: Jul 2005
Posts: 381
Likes: 0
From: bluff city tn.
Default

you don't have to pull the tanks but u do need to drop the trans. to remove the cross pipe i have replaced at least 3 fue pumps on 04 and that is the only way to disconnect the pipe for reapairs unless someone has very small arms and can just lower the trans. down to get it
Reply
Old Nov 15, 2007 | 08:20 AM
  #7  
runamuk's Avatar
runamuk
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Default

Originally Posted by vette3800
I think it is actually leaking at the connection on the left tank.
This is where mine was leaking and it turned out to be the tank. I pulled the tank and everything looked good but I decided to replace the tank before I would replace crossover pipe and the new tank fixed the leak.
Reply
Old Nov 15, 2007 | 09:20 PM
  #8  
craig04c5's Avatar
craig04c5
Melting Slicks
15 Year Member
 
Joined: Jan 2004
Posts: 3,012
Likes: 15
From: Jensen Beach FL
Default

My 04 had the same problem and was fixed under new car warranty.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-1

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-2

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-3

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-4

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-5

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-6

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-7

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-8

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-9

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
Old Nov 15, 2007 | 09:44 PM
  #9  
99ssconv's Avatar
99ssconv
Instructor
10 Year Member
 
Joined: Jan 2006
Posts: 246
Likes: 4
From: Denton County Texas
Default

FYI

I have done numerous repairs on these, the automatic trans are more difficult to gain access. The manual trans make the crossover replacement a snap. The book time is right though. For a side job I would charge $300 plus the parts.
I remove the mufflers, rear sway bar, vent solenoid and thats it to replace the crossover
Reply
Old Nov 16, 2007 | 07:49 AM
  #10  
vette3800's Avatar
vette3800
Thread Starter
Instructor
15 Year Member
 
Joined: Dec 2006
Posts: 187
Likes: 6
From: Chapin SC
Default

Thanks to everyone for your help. I plan to file a report to NHTSA and have taken numerous pics. GM has refused to cover under warranty and refused to admit that there is a problem with their mickey mouse connection design between the tanks and the transfer line connector.
Reply
Old Nov 16, 2007 | 10:37 PM
  #11  
jrizzuto's Avatar
jrizzuto
Pro
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2005
Posts: 725
Likes: 89
From: East Northport NY
Default

my 04 leaked too, covered under warrantee at the time. I was told it is the o-rings on the connector to the tanks, but the preferred way to fix was to replace everything just in case...because considering the labor, they wouldn't want to do it a 2nd time.

I also heard that putting additives in the tank and NOT IMMEDIATELY WASHING IT DOWN WITH A TANK OF GAS can mess up those o-rings and cause a leak.

So beware when adding things to your tanks !
Reply
Old Nov 17, 2007 | 05:15 PM
  #12  
Wisdom's Avatar
Wisdom
Racer
10 Year Member
 
Joined: Sep 2004
Posts: 486
Likes: 1
From: Houston TX
Default

The 04's had some bad fuel tanks in the supply line. The Cadellac XLR's and 04 Vettes were affected. Once your driver's side fuel tank is replaced you won't have a problem. The tech that worked on mine reported that he could feel the difference when the crosstank feed tube snapped into place on the new tank. They thought it was the o-rings at first too, until they had to do it again. I don't believe that it's the additives affecting the o-rings. I do believe that there was a faulty tank design.

- Wisdom
Reply
Old Nov 17, 2007 | 07:08 PM
  #13  
jrizzuto's Avatar
jrizzuto
Pro
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2005
Posts: 725
Likes: 89
From: East Northport NY
Default

the more i think about it, it is quite unfair that the dealer won't cover it. Try another dealership, talk to the top guy, be sweet as sugar. I can't imagine they would turn away a car with 11k !

Be creative. Their business is based on relationships. Try. Maybe if he sees that your regular dealership did not satisfy you, perhaps he can grab onto you as a new customer and maybe your next purchase will be with his.

Good luck.
Reply
Old Nov 18, 2007 | 10:14 AM
  #14  
runamuk's Avatar
runamuk
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Default

Originally Posted by Wisdom
The 04's had some bad fuel tanks in the supply line. The Cadellac XLR's and 04 Vettes were affected. Once your driver's side fuel tank is replaced you won't have a problem. The tech that worked on mine reported that he could feel the difference when the crosstank feed tube snapped into place on the new tank. They thought it was the o-rings at first too, until they had to do it again. I don't believe that it's the additives affecting the o-rings. I do believe that there was a faulty tank design.

- Wisdom


You can report this to the NHTSA if you want but they won't be able to do anything, GM will show them that they built approx 35,000 of these every year since 1997 and then be able to say they've only seen XX number of failures (probably less than .1%), granted all of the leaks I've heard of were early 2004 models and they were all left side tanks.
Reply
Old Nov 18, 2007 | 10:26 AM
  #15  
SteveDoten's Avatar
SteveDoten
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2003
Posts: 6,276
Likes: 227
From: Farmington CT
Cruise-In VII Veteran
Default

interesting info on the '04 FFS tanks
Reply
Old Nov 18, 2007 | 02:38 PM
  #16  
craig04c5's Avatar
craig04c5
Melting Slicks
15 Year Member
 
Joined: Jan 2004
Posts: 3,012
Likes: 15
From: Jensen Beach FL
Default

Originally Posted by runamuk


You can report this to the NHTSA if you want but they won't be able to do anything, GM will show them that they built approx 35,000 of these every year since 1997 and then be able to say they've only seen XX number of failures (probably less than .1%), granted all of the leaks I've heard of were early 2004 models and they were all left side tanks.
There was a redesign for 2004 and that caused the problem. This needs to be stated to NTSA.
Reply
Old Nov 18, 2007 | 06:02 PM
  #17  
HEB's Avatar
HEB
Melting Slicks
20 Year Member
 
Joined: Apr 1999
Posts: 2,988
Likes: 22
From: New Lebanon.Ohio
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
Default

Same thing on my 04 with 400 miles, left side tank and crossover pipe replaced. Had to have it flat bedded back to dealer, it was leaking bad.
Reply

Get notified of new replies

To Gas line leaking between tanks ??????

Old Nov 20, 2007 | 09:04 PM
  #18  
vette3800's Avatar
vette3800
Thread Starter
Instructor
15 Year Member
 
Joined: Dec 2006
Posts: 187
Likes: 6
From: Chapin SC
Default

I just picked up my car after having all crossover gas lines and o rings replaced on both tanks. The o rings on the lines tying into the left tank were bad. Major job, but I was now relieved. I then parked it in the garage and was getting ready to reset all the electronics and re-detail it when I noticed that gas is leaking in the same place AGAIN!!!!!! It sounds like I should have had them replace the left tank also. HELP!!!
Reply
Old Nov 21, 2007 | 08:44 AM
  #19  
runamuk's Avatar
runamuk
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Default

Originally Posted by craig04c5
There was a redesign for 2004 and that caused the problem. This needs to be stated to NTSA.
The more I think about, I think your absolutely correct, this way if the Government makes GM issue a recall I might get reimbursed for my fuel tank, this is the only reason I'm not going to throw the old fuel tank away.

BTW - the actual fuel system change happened mid year of the 03 model, I think around November/December 2002 but for some reason all of the failures I've heard about were 2004 cars, GM must have made a supplier change or the supplier made a manufacturing change???
Reply
Old Nov 21, 2007 | 09:01 AM
  #20  
mike348's Avatar
mike348
Burning Brakes
 
Joined: Apr 2004
Posts: 908
Likes: 0
From: Ponchatoula la.
Default

Originally Posted by vette3800
I just picked up my car after having all crossover gas lines and o rings replaced on both tanks. The o rings on the lines tying into the left tank were bad. Major job, but I was now relieved. I then parked it in the garage and was getting ready to reset all the electronics and re-detail it when I noticed that gas is leaking in the same place AGAIN!!!!!! It sounds like I should have had them replace the left tank also. HELP!!!
Tank flange for crossover was out of shape on mine. Find a dealer that has a lot of Vettes on his lot. Talk to SERVICE MANAGER only. He can give you a GM GOOD WILL repair for a new tank.
Reply



All times are GMT -4. The time now is 11:13 AM.

story-0
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-1
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-2
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-3
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-4
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-5
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-6
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-7
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-8
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-9
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE