Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > Fueling & Injection
Sign in using an external account
Register Forgot Password?
Search

Fueling & Injection
Fuel Pumps | Injectors | Rails | Regulators | Tanks

Had an injector o-ring blow out while i was driving..(update 8-3)

Reply
 
Thread Tools Search this Thread
Old 07-25-2012, 05:47 PM   #1
TECH Fanatic
 
Ryans99ls1's Avatar
 
Trader Rating: 16
Join Date: Dec 2007
Location: OH & MI
Posts: 1,350
Default Had an injector o-ring blow out while i was driving..(update 8-3)

luckily the car did not catch on fire but the it was SOAKING the motor in fuel. Im running siemens 80lb injectors with fast fuel rails. is there any way to prevent this from happening again? im already replacing all the o-rings but im worried its gonna randomly happen again. the car has been fine under boost, it happened under normal driving
__________________
99 TA-PT7675, Stock bottom end LS1, 6 speed, 9in, E85
806whp/813tq @20psi - My Build -http://ls1tech.com/forums/forced-ind...-page-3-a.html
01 Hardtop Formula Firehawk-Lid, Ported TB, LT's, Ypipe, Factory SLP dual-dual, 6 speed, Garage queen

Last edited by Ryans99ls1; 08-03-2012 at 05:33 PM..
Ryans99ls1 is offline   Reply With Quote
Old 07-25-2012, 06:24 PM   #2
LS1Tech Sponsor
 
FICINJECTORS's Avatar
 
Trader Rating: 30
Join Date: Sep 2008
Location: Cumming, Ga
Posts: 1,254
Default

Quote:
Originally Posted by Ryans99ls1 View Post
luckily the car did not catch on fire but the it was SOAKING the motor in fuel. Im running siemens 80lb injectors with fast fuel rails. is there any way to prevent this from happening again? im already replacing all the o-rings but im worried its gonna randomly happen again. the car has been fine under boost, it happened under normal driving
are you sure you have the right bottom o ring? I ask because there is a 15mm o ring that should be used on the manifold side, the siemens comes stock with a 14mm. are you sure the injector is not too low in the rail as o rings don't just blow out if they are relatively new
FICINJECTORS is offline   Reply With Quote
Old 07-25-2012, 06:34 PM   #3
TECH Fanatic
 
Ryans99ls1's Avatar
 
Trader Rating: 16
Join Date: Dec 2007
Location: OH & MI
Posts: 1,350
Default

Quote:
Originally Posted by FICINJECTORS View Post
are you sure you have the right bottom o ring? I ask because there is a 15mm o ring that should be used on the manifold side, the siemens comes stock with a 14mm. are you sure the injector is not too low in the rail as o rings don't just blow out if they are relatively new
im almost positive the injector is fully seated. i put them in the rail first then pressed them into the manifold, none were uneven. when i first put them on, one came leaky from the factory. replaced it with one from my stockers and it sealed right up. this is not the same injector though

i wouldnt be suprised if the injectors dont have the 15mm oring on the bottom. from what i remember all the orings looked the same (blue). where can i get the proper 15mm ones?
__________________
99 TA-PT7675, Stock bottom end LS1, 6 speed, 9in, E85
806whp/813tq @20psi - My Build -http://ls1tech.com/forums/forced-ind...-page-3-a.html
01 Hardtop Formula Firehawk-Lid, Ported TB, LT's, Ypipe, Factory SLP dual-dual, 6 speed, Garage queen
Ryans99ls1 is offline   Reply With Quote
Old 07-25-2012, 07:10 PM   #4
TECH Fanatic
 
RezinTexas's Avatar
 
Trader Rating: 0
Join Date: Jun 2011
Location: Norway
Posts: 1,330
Default

I'm planning to keep one of these in the truck. It wont damage the engine from corrosive chemicals or thermal shock.

Amazon Amazon
__________________

2001 Chevy Suburban 2500 4x4 (in storage) Build Thread: Forged 383 Iron Block, Machined by HKE, Built by ME, AFR 210s, 224/228, 3" Dual Exhaust, Mamofied LSXRT, FAST 92, Street Tuned by Patrick Guerra, OEM 4L80e and 4.10, 33" Tires.
2006 Dodge Magnum SRT8 (in storage), OEM 6.1 Hemi, 4.055" bore, forged crankshaft, piston oil squirters, shaft mount rockers. Absolutely no EGR, MDS, VVT, DOD, etc., Pirelli Pzero 275's all around.
2014 Honda CRV - POS Norway daily driver...
RezinTexas is offline   Reply With Quote
Old 07-25-2012, 07:34 PM   #5
LS1Tech Sponsor
 
FICINJECTORS's Avatar
 
Trader Rating: 30
Join Date: Sep 2008
Location: Cumming, Ga
Posts: 1,254
Default

Quote:
Originally Posted by Ryans99ls1 View Post
im almost positive the injector is fully seated. i put them in the rail first then pressed them into the manifold, none were uneven. when i first put them on, one came leaky from the factory. replaced it with one from my stockers and it sealed right up. this is not the same injector though

i wouldnt be suprised if the injectors dont have the 15mm oring on the bottom. from what i remember all the orings looked the same (blue). where can i get the proper 15mm ones?
Sorry my bad, I thought you had a 102. Ls6 manifold uses 14 top and bottom. I guess you need just o rings
FICINJECTORS is offline   Reply With Quote
Old 07-26-2012, 08:30 AM   #6
TECH Fanatic
 
Ryans99ls1's Avatar
 
Trader Rating: 16
Join Date: Dec 2007
Location: OH & MI
Posts: 1,350
Default

Quote:
Originally Posted by RezinTexas View Post
I'm planning to keep one of these in the truck. It wont damage the engine from corrosive chemicals or thermal shock.

http://www.amazon.com/H3R-Performanc...e+extinguisher
hahaha yeah im planning on picking one up after this little scare. im only laughing cus i asked how to keep this from happening again you posted a fire extinguisher.

Quote:
Originally Posted by FICINJECTORS View Post
Sorry my bad, I thought you had a 102. Ls6 manifold uses 14 top and bottom. I guess you need just o rings
i hope they do the trick. thanks for the help.

im still open to hear what anyone else has to say!
__________________
99 TA-PT7675, Stock bottom end LS1, 6 speed, 9in, E85
806whp/813tq @20psi - My Build -http://ls1tech.com/forums/forced-ind...-page-3-a.html
01 Hardtop Formula Firehawk-Lid, Ported TB, LT's, Ypipe, Factory SLP dual-dual, 6 speed, Garage queen
Ryans99ls1 is offline   Reply With Quote
Old 07-26-2012, 08:42 AM   #7
10 Second Club
 
Zmg00camaross's Avatar
 
Trader Rating: 9
Join Date: Jun 2009
Location: Missouri
Posts: 3,954
Default

Sometimes **** happens. You may have slightly pinch it when installing and took a while for it to blow it out. Had it happen to me took 2 weeks before it happend. Just lube the o ring install the injector and probly not happen again.
__________________
00 Camaro cam only M6 MWC suspension front and rear, monster clutch, FAP tune and some tricks. 10.86 at 126 mph rowing gears. Nitrous coming soon.
Zmg00camaross is offline   Reply With Quote
Old 08-03-2012, 05:32 PM   #8
TECH Fanatic
 
Ryans99ls1's Avatar
 
Trader Rating: 16
Join Date: Dec 2007
Location: OH & MI
Posts: 1,350
Default

alright so it turns out i did infact have a pinched o-ring. replaced it and it was much better. BUT its still leaking somewhat.

i replaced all of the o-rings on that side and the front 2 injectors feel pretty sturdy once they are in. The rear 2 basically fall out on their own if they are shaken a little bit. i switched the injectors around so i know its not that.

anyone else know a better way to make them seal or how to maybe get more force on the rail?
__________________
99 TA-PT7675, Stock bottom end LS1, 6 speed, 9in, E85
806whp/813tq @20psi - My Build -http://ls1tech.com/forums/forced-ind...-page-3-a.html
01 Hardtop Formula Firehawk-Lid, Ported TB, LT's, Ypipe, Factory SLP dual-dual, 6 speed, Garage queen
Ryans99ls1 is offline   Reply With Quote
Old 08-03-2012, 05:51 PM   #9
TECH Veteran
 
Old Geezer's Avatar
 
Trader Rating: 1
Join Date: Jun 2004
Location: GA, USA
Posts: 4,480
Send a message via AIM to Old Geezer
Default

Check the rail bore sizes.
Look to be sure the rail hold downs aren't flexing.
Look at the bore finish in the rails. When they are drilled, there is a chance the bit could leave a scratch/groove.[Dull drill] I had another brand that had scratches in a couple of the bores. Had to buff them with a cross buff from Powerhouse tools.
__________________
Chuck
Hot rodding and drag racing since 55
Injector inspector
55 Chevy/LQ9 Tyr Fryer
Turbo Buick in the 9's/142mph.
Old Geezer is offline   Reply With Quote
Old 08-03-2012, 05:59 PM   #10
TECH Fanatic
 
Ryans99ls1's Avatar
 
Trader Rating: 16
Join Date: Dec 2007
Location: OH & MI
Posts: 1,350
Default

Quote:
Originally Posted by Old Geezer View Post
Check the rail bore sizes.
Look to be sure the rail hold downs aren't flexing.
Look at the bore finish in the rails. When they are drilled, there is a chance the bit could leave a scratch/groove.[Dull drill] I had another brand that had scratches in a couple of the bores. Had to buff them with a cross buff from Powerhouse tools.
I checked the bore on them, there werent any scratches or anything. Ill have to get the dial calipers out and check the roundness though.

Ill look into the mounts flexing too. thanks!
__________________
99 TA-PT7675, Stock bottom end LS1, 6 speed, 9in, E85
806whp/813tq @20psi - My Build -http://ls1tech.com/forums/forced-ind...-page-3-a.html
01 Hardtop Formula Firehawk-Lid, Ported TB, LT's, Ypipe, Factory SLP dual-dual, 6 speed, Garage queen
Ryans99ls1 is offline   Reply With Quote
Old 07-12-2013, 12:37 AM   #11
Teching In
 
Trader Rating: 0
Join Date: Oct 2007
Posts: 6
Default

Quote:
Originally Posted by Ryans99ls1 View Post
luckily the car did not catch on fire but the it was SOAKING the motor in fuel. Im running siemens 80lb injectors with fast fuel rails. is there any way to prevent this from happening again? im already replacing all the o-rings but im worried its gonna randomly happen again. the car has been fine under boost, it happened under normal driving
Did you solve this? Same injector and rails on a 102. It happened to me today. How do I tell if I have the right o rings?
charlesready is offline   Reply With Quote
Old 07-12-2013, 07:44 AM   #12
TECH Regular
 
1bad03snake's Avatar
 
Trader Rating: 14
Join Date: Dec 2008
Location: Pasadena,Tx
Posts: 481
Default

How much fuel pressure are you running?
__________________
2013 ecoboost F150
1988 Mustang 6.0, 317's, Holley Mid Ram, Home built hotside W/ S475, Tick cam, th400 w/brake, FTI 3400 stall.
1bad03snake is offline   Reply With Quote
Old 07-13-2013, 12:49 AM   #13
Teching In
 
Trader Rating: 0
Join Date: Oct 2007
Posts: 6
Default

Quote:
Originally Posted by 1bad03snake View Post
How much fuel pressure are you running?
58 psi base and boost ref.
charlesready is offline   Reply With Quote
Old 07-14-2013, 08:45 PM   #14
TECH Fanatic
 
Ryans99ls1's Avatar
 
Trader Rating: 16
Join Date: Dec 2007
Location: OH & MI
Posts: 1,350
Default

Quote:
Originally Posted by charlesready View Post
Did you solve this? Same injector and rails on a 102. It happened to me today. How do I tell if I have the right o rings?
What i actually did is make new fuel rail mounts that reallly pull down the rear portion of the the fuel rail. If you the look at where the mounts bolt to the manifold, the front mount is much closer to the end of the fuel rail, the rear is more towards the center. The rear one being closer to the center obviously doesnt put enough pressure on top of the back injector which makes it very easy to blow one out if the oring is not perfect. I check it all the time now and its been fine since.
__________________
99 TA-PT7675, Stock bottom end LS1, 6 speed, 9in, E85
806whp/813tq @20psi - My Build -http://ls1tech.com/forums/forced-ind...-page-3-a.html
01 Hardtop Formula Firehawk-Lid, Ported TB, LT's, Ypipe, Factory SLP dual-dual, 6 speed, Garage queen
Ryans99ls1 is offline   Reply With Quote
Old 07-14-2013, 08:45 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Top injector o-ring came out of fast fuel rail Buford17 Generation III External Engine 5 10-06-2014 11:19 PM
Lower injector o-rings for FAST 102 and LS1 injectors Jonathan@Tick Fueling & Injection 2 09-11-2012 09:31 AM
injectors leaking under boost Area47 Forced Induction 16 01-25-2012 11:53 AM
Fuel Injector O-rings parbreak Fueling & Injection 3 05-25-2006 01:52 PM
Can I reuse fuel injector o-rings? ~JOSHUA Generation III Internal Engine 5 10-03-2005 02:21 PM


Tags
102, 15mm, blowing, blown, blowout, fast, front, fuel, injector, leaking, ls1, oring, orings, prevent, rings, swap


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



Join Ls1Tech

All times are GMT -5. The time now is 05:23 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - Terms of Service - JOBS
Emails & Contact Details