2004 Gas tank top access
Thread Starter
Advanced
Joined: Apr 2007
Posts: 60
Likes: 0
From: Boise Idaho
2004 Gas tank top access
Hi All,
I have recently aquired the dreaded gas leak (primary side) each time I fill up my tank. I've looked through many of the other gas leak posts but have not found how to access the top of the tank to find what's loose or cracked or torn. Smoknc6z06 says I should be able to access the clamps on the cross over hose (2") and check them first but I can't even see the clamps and barely can touch the hose.
How does one drop the tank? Or, if it's accessible some other way, is there a procedure some where?
Thanks in advance,
Jerry
Boise
I have recently aquired the dreaded gas leak (primary side) each time I fill up my tank. I've looked through many of the other gas leak posts but have not found how to access the top of the tank to find what's loose or cracked or torn. Smoknc6z06 says I should be able to access the clamps on the cross over hose (2") and check them first but I can't even see the clamps and barely can touch the hose.
How does one drop the tank? Or, if it's accessible some other way, is there a procedure some where?
Thanks in advance,
Jerry
Boise
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
You may want to look at this article as it helps understand the FFS fuel system .... I believe the procedure to drop the tanks has changed because fuel lines that previously were external are now internal ... and the crossover pipe is now metal ... not rubber.
http://www.corvetteactioncenter.com/...el+Tank+System
You'll need to gain access to (or purchase) the 2004 Service Manuals for the procedure.
Good luck,
http://www.corvetteactioncenter.com/...el+Tank+System
You'll need to gain access to (or purchase) the 2004 Service Manuals for the procedure.
Good luck,
Burning Brakes
Joined: Apr 2004
Posts: 908
Likes: 0
From: Ponchatoula la.
My 04 was leaking at the cross over pipe where it snapped onto a deformed tank flange. Dealer replaced tank. Mine leaked anytime the engine was running. I've heard of other 04s with this problem.
Thread Starter
Advanced
Joined: Apr 2007
Posts: 60
Likes: 0
From: Boise Idaho
Thanks Mike and Steve.
The action center article is great information on the new fuel system.
I'm still curious to know if I have to drop the exhaust and driveline to get to the top of the gas tank for troubleshooting. According to the corvette action center article I need to do it the first time to make myself familiar with the components then if I have to access the tank again, I won't have to drop the exhaust and driveline.
Can anyone make me a copy of the service manual section on removing the 04 primary gas tank?
Thanks!
The action center article is great information on the new fuel system.
I'm still curious to know if I have to drop the exhaust and driveline to get to the top of the gas tank for troubleshooting. According to the corvette action center article I need to do it the first time to make myself familiar with the components then if I have to access the tank again, I won't have to drop the exhaust and driveline.
Can anyone make me a copy of the service manual section on removing the 04 primary gas tank?
Thanks!
Intermediate
Joined: Nov 2006
Posts: 41
Likes: 0
Dave
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Aug 2006
Posts: 2,167
Likes: 11
From: Powell TN
Cruise-In VIII Veteran
If you will PM me your e-mail address, I will send you a .pdf of the instructions. Also, I have the tanks out of my wifes car right now if you need any detailed pics of something. Let me know, because I plan on putting them back in sometime today. Her car is a 2005, but the setup/parts are the same.
Thread Starter
Advanced
Joined: Apr 2007
Posts: 60
Likes: 0
From: Boise Idaho
Got my tank out after lowering rearend, tranny, and driveline all in one piece. Did remove the cradle for the extra room.
Found my gas leak after a simple pressure test on the bench. Put the filler neck and gas cap back on, shoved a small yogurt cup into the crossover connection port, and ran some air throught the vent tube. With just mild pressure build up, bubbles immediately started coming out in the seam of the plastic piece "welded" into the tank for the crossover connector. So a total tank failure.
Good news is I saved enough doing it myself that my awesome wife is letting me install a new 3.42 diff while I'm into it.
Oh, and if you want a cool fuel line quick disconnect tool, talk to TIM. Thumbs up!
Found my gas leak after a simple pressure test on the bench. Put the filler neck and gas cap back on, shoved a small yogurt cup into the crossover connection port, and ran some air throught the vent tube. With just mild pressure build up, bubbles immediately started coming out in the seam of the plastic piece "welded" into the tank for the crossover connector. So a total tank failure.
Good news is I saved enough doing it myself that my awesome wife is letting me install a new 3.42 diff while I'm into it.
Oh, and if you want a cool fuel line quick disconnect tool, talk to TIM. Thumbs up!
Last edited by jwood01; Jun 9, 2008 at 11:50 PM.
