Fuel Leak Near Tank - Any Likely Culprits? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JemSS · 12-17-2021, 09:22 PM

I have a 2010 Camaro 2SS that sat for about 10 months. I recently got it going again and noticed it smelled like gas. It went in today for an inspection and oil change and the mechanic noticed a gas leak near the tank (see attachment).

It appears to only leak when the car is running, as I haven't noticed any fuel in the driveway and you only smell the gas after starting it.

Any likely culprits or places I should be starting with this?

dru21281 · 12-17-2021, 10:24 PM

Best guess on the leak would be the plastic top 90Deg fuel pump hat fitting. The V2 CTS-V has a common problem with that plastic fitting cracking and leaking fuel with age. Happened on a used V2 pump I purchased, lots of threads about this. The Camaro fitting looks to be built a bit stronger, but still may crack in the same way...
Or could also be the fuel pump module oring, fuel line and/or fitting that connects to pump on top.

Sent from my Pixel 2 XL using Tapatalk

Bo White · 12-18-2021, 09:44 PM

Mine was leaking from a crack at the nipple of the fuel pump hat.

FASTFATBOY · 12-19-2021, 06:53 PM

That is from the pump assembly Oring, drop thee tank and replace

Bo White · 12-20-2021, 09:15 AM

I cut an access hole under the seat. Quite a few posts here and on FB on where and how.

Kajun · 12-24-2021, 08:37 AM

Might not want to cut an access hole with a gas leak. Safer to drop the tank. I've seen rodents set up home and chew through gas lines also. Especially on vehicles that sat for a while.

Camaro2ss2010 · 12-24-2021, 04:20 PM

Quote:

Originally Posted by Kajun

Might not want to cut an access hole with a gas leak. Safer to drop the tank. I've seen rodents set up home and chew through gas lines also. Especially on vehicles that sat for a while.

Electric shears would work fine as they do not create much heat or any sparks. I would not recommend cutting it with a cutoff wheel though.

Black_SS10 · 12-25-2021, 10:28 AM

Fuel pump.

I cut a whole in mine to install my triple pump setup. Super easy with a cutoff wheel. Just take your time. I would be leary about doing it with a fuel leak. Better to drop the tank than start a fire.

Bo White · 12-27-2021, 02:10 AM

I used a drill with length of rubber fuel hose on the bit to keep from drilling too far and then shears with my leak.

FASTFATBOY · 12-27-2021, 12:06 PM

This is the tool I would choose, it is commonly known as a "body saw" and runs on air.

The chrome guard on the front can be changed to control the depth of the cut. This tool uses standard hacksaw blades and does not put off many sparks.

https://www.harborfreight.com/profes...4aAvgbEALw_wcB

HyperV117 · 01-09-2022, 09:51 PM

I cut a hole following a guide here. It was sketchy but now I have an access door in case I ever have to go back in there

12-17-2021, 09:22 PM	#1
JemSS Drives: 2010 Camaro 2SS/RS, 1993 Camaro Z28 Join Date: Dec 2012 Location: Tucson, AZ Posts: 22	Fuel Leak Near Tank - Any Likely Culprits? I have a 2010 Camaro 2SS that sat for about 10 months. I recently got it going again and noticed it smelled like gas. It went in today for an inspection and oil change and the mechanic noticed a gas leak near the tank (see attachment). It appears to only leak when the car is running, as I haven't noticed any fuel in the driveway and you only smell the gas after starting it. Any likely culprits or places I should be starting with this? Attached Images

12-18-2021, 09:44 PM	#3
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Mine was leaking from a crack at the nipple of the fuel pump hat. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

12-20-2021, 09:15 AM	#5
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	I cut an access hole under the seat. Quite a few posts here and on FB on where and how. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

12-24-2021, 08:37 AM	#6
Kajun Drives: 2013 1SS L99 Join Date: Dec 2015 Location: Brandon,MS Posts: 60	Might not want to cut an access hole with a gas leak. Safer to drop the tank. I've seen rodents set up home and chew through gas lines also. Especially on vehicles that sat for a while. __________________ 2013 1SS/RS L99-GPI VVT SS1 - TSP 1 7/8 headers with Borla Touring exhaust - ESS Tuning YSI V7 - Fore Innovations Dual pump fuel system - 1" BMR lowering springs - BMR toe rods and trailing arms - Prothane rear cradle bushings - Yank 3400 Stall -

12-25-2021, 10:28 AM	#8
Black_SS10 SomeguyK Drives: 2010 Black 2SS/RS Join Date: Nov 2014 Location: FL Posts: 1,947	Fuel pump. I cut a whole in mine to install my triple pump setup. Super easy with a cutoff wheel. Just take your time. I would be leary about doing it with a fuel leak. Better to drop the tank than start a fire. __________________ TMS 427, Dart iron Block, Forged assembly, Frankenstien heads, AGP TT 62/62 BB turbo's, AGP/Fore triple fuel system, Tilton clutch, Holley 1 7/8 shorties, Technostalgia tail lights,Oracle, Aeroforce, MGW shifter,Flowmaster, Pegasus subframe bushings,BMR trailing & toe arms,Z28 UCA bushings,Zl1 rear sway bar,Prothane,BMR,Goodridge brake lines,Ridetech HQ coilovers,3.91,Trutrac,billet caps,DSS axles,HE offest,built TR6060,1LE diffuser,Havoc spoiler,SSclones,20in MRR 017, Pirelli P Zero, Nitto NT555RII More to come.

12-17-2021, 10:24 PM	#2
dru21281 Join Date: Apr 2014 Posts: 138	Best guess on the leak would be the plastic top 90Deg fuel pump hat fitting. The V2 CTS-V has a common problem with that plastic fitting cracking and leaking fuel with age. Happened on a used V2 pump I purchased, lots of threads about this. The Camaro fitting looks to be built a bit stronger, but still may crack in the same way... Or could also be the fuel pump module oring, fuel line and/or fitting that connects to pump on top. Sent from my Pixel 2 XL using Tapatalk

12-19-2021, 06:53 PM	#4
FASTFATBOY Drives: 2013 ZL1 Join Date: Nov 2018 Location: Mobile Al Posts: 302	That is from the pump assembly Oring, drop thee tank and replace

12-27-2021, 02:10 AM	#9
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	I used a drill with length of rubber fuel hose on the bit to keep from drilling too far and then shears with my leak. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

12-27-2021, 12:06 PM	#10
FASTFATBOY Drives: 2013 ZL1 Join Date: Nov 2018 Location: Mobile Al Posts: 302	This is the tool I would choose, it is commonly known as a "body saw" and runs on air. The chrome guard on the front can be changed to control the depth of the cut. This tool uses standard hacksaw blades and does not put off many sparks. https://www.harborfreight.com/profes...4aAvgbEALw_wcB

01-09-2022, 09:51 PM	#11
HyperV117 Drives: 2010 Camaro 1SS Join Date: Nov 2015 Location: CA Posts: 358	I cut a hole following a guide here. It was sketchy but now I have an access door in case I ever have to go back in there __________________