Boost leak from fuel injectors.

TurboWS6 · 09-08-2012, 11:45 PM

So I built a boost leak test rig today installed and tested the car, found a few leaks from vacuum lines fixed those. Also found that the fuel injectors are leaking(all 8 of them) on the intake. Went to the autoparts store and picked up a new set of o-rings and got all to seal except for the front one on the driver side. Swapped injectors same thing, pulled it all apart verified the hole was clean round not scared or cracked, even sprayed it out with some starting fluid put it back together still leaks under pressure. It is not leaking under vacuum but with positive pressure its substantial, I sprayed some soap bubble on it and it doesn't bubble it blows the water/soap solution away.

Curious if anyone knows if there is an over sized o ring that I can run or other solution to this?

DIGGLER · 09-08-2012, 11:55 PM

is your fuel rail pushing the injector far enough into the hole? can you adjust the rail so it will push down more?

TurboWS6 · 09-09-2012, 12:10 AM

Quote:

Originally Posted by DIGGLER

is your fuel rail pushing the injector far enough into the hole? can you adjust the rail so it will push down more?

Not easily, Ive been contemplated pulling it and opening up the bracket holes to allow the rail to go further down. Although it seems to be seating them as I really cant push the injectors down but they will turn so it doesn't put a lot of pressure on them.

1998ta__1991rs · 09-09-2012, 01:44 AM

Just turn the boost up

Carlrx7 · 09-09-2012, 02:18 AM

ls1 orings are the fatest ones.

GreebeanZ28 · 09-09-2012, 02:41 AM

Gto o rings are the ugliest. Just sayin'.

Foose04 · 09-09-2012, 06:02 AM

I had to reseat mine a few times to get them all to seal. I got custom Foose racing brackets though as there is no aftermarket bolt on rails for us trucks. Biggest thing for me was making sure the injectors weren't being pressed in at an angle. I'd twist them back and forth while torquing with grease on the rings.

gearmesh, inc. · 09-09-2012, 06:55 AM

You can try taking one of your existing o-rings to Charleston Rubber and Gasket to try to step up to the next available thicker cross section. They have different durometer (stiffness) materials, also. If a little thicker cross section thickness isn't available or won't quite work, the stiffer material my work. I would recommend viton for the material, though.

TurboWS6 · 09-09-2012, 09:56 AM

Quote:

Originally Posted by Foose04

I had to reseat mine a few times to get them all to seal. I got custom Foose racing brackets though as there is no aftermarket bolt on rails for us trucks. Biggest thing for me was making sure the injectors weren't being pressed in at an angle. I'd twist them back and forth while torquing with grease on the rings.

Put vaseline on them at the start, the above process is how I got 7 of them to seat but #1 refuses to play.

BAD BOB · 09-09-2012, 10:54 AM

What kind of intake?

TurboWS6 · 09-09-2012, 04:14 PM

Quote:

Originally Posted by BAD BOB

What kind of intake?

LS1

BAD BOB · 09-09-2012, 05:12 PM

Could a fire caused it to warp? Bc one the o ring enters the intake bore it should seal no matter what if it is straight

TurboWS6 · 09-09-2012, 05:16 PM

Got it to seal finally oblonged the braket holes for the rail, and moved it about 1/8 inch forward and its sealed.

09-09-2012, 01:44 AM	#4
1998ta__1991rs Senior Member Join Date: Jun 2008 Location: West Ash Posts: 4,283	Just turn the boost up __________________ Funny

09-09-2012, 02:18 AM	#5
Carlrx7 Senior Member Join Date: Apr 2010 Location: Ladson,SC Posts: 3,813	ls1 orings are the fatest ones. __________________ Dark Aladdin

09-09-2012, 02:41 AM	#6
GreebeanZ28 Senior Member Join Date: Oct 2011 Location: Easley Posts: 2,300	Gto o rings are the ugliest. Just sayin'. __________________

09-09-2012, 06:02 AM	#7
Foose04 Senior Member Join Date: Feb 2010 Posts: 965	I had to reseat mine a few times to get them all to seal. I got custom Foose racing brackets though as there is no aftermarket bolt on rails for us trucks. Biggest thing for me was making sure the injectors weren't being pressed in at an angle. I'd twist them back and forth while torquing with grease on the rings. __________________ 12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags. 04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22 05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's

09-09-2012, 06:55 AM	#8
gearmesh, inc. creepy azz cracka Join Date: Nov 2008 Location: Summerville Posts: 1,587	You can try taking one of your existing o-rings to Charleston Rubber and Gasket to try to step up to the next available thicker cross section. They have different durometer (stiffness) materials, also. If a little thicker cross section thickness isn't available or won't quite work, the stiffer material my work. I would recommend viton for the material, though. __________________ "I came into this world kicking, screaming,and covered in someone else's blood, I have no problem leaving the same way!" ÔÇ£If you carry a gun, people will call you paranoid. ThatÔÇÖs ridiculous. If I have a gun, what in the hell do I have to be paranoid about?ÔÇØ -Clint Smith, Thunder Ranch.

09-08-2012, 11:45 PM	#1
TurboWS6 Senior Member Join Date: Jan 2012 Location: Rockingham, NC Posts: 799	Boost leak from fuel injectors. So I built a boost leak test rig today installed and tested the car, found a few leaks from vacuum lines fixed those. Also found that the fuel injectors are leaking(all 8 of them) on the intake. Went to the autoparts store and picked up a new set of o-rings and got all to seal except for the front one on the driver side. Swapped injectors same thing, pulled it all apart verified the hole was clean round not scared or cracked, even sprayed it out with some starting fluid put it back together still leaks under pressure. It is not leaking under vacuum but with positive pressure its substantial, I sprayed some soap bubble on it and it doesn't bubble it blows the water/soap solution away. Curious if anyone knows if there is an over sized o ring that I can run or other solution to this? __________________ [IMG][/IMG] 1999 WS6, 6.0L, S480, TH400, Dana 60 1967 GTO 496" Poncho stroker, 4 speed, 4:11s 2007 Hemi Ram 2013 Grand Caravan RT 1997 Civic

09-08-2012, 11:55 PM	#2
DIGGLER Senior Member Join Date: Aug 2012 Posts: 1,458	is your fuel rail pushing the injector far enough into the hole? can you adjust the rail so it will push down more?

09-09-2012, 10:54 AM	#10
BAD BOB Senior Member Join Date: Mar 2008 Location: SUMMERVILLE Posts: 3,681	What kind of intake? __________________ IM BAD BOB

09-09-2012, 05:12 PM	#12
BAD BOB Senior Member Join Date: Mar 2008 Location: SUMMERVILLE Posts: 3,681	Could a fire caused it to warp? Bc one the o ring enters the intake bore it should seal no matter what if it is straight __________________ IM BAD BOB

09-09-2012, 05:16 PM	#13
TurboWS6 Senior Member Join Date: Jan 2012 Location: Rockingham, NC Posts: 799	Got it to seal finally oblonged the braket holes for the rail, and moved it about 1/8 inch forward and its sealed. __________________ [IMG][/IMG] 1999 WS6, 6.0L, S480, TH400, Dana 60 1967 GTO 496" Poncho stroker, 4 speed, 4:11s 2007 Hemi Ram 2013 Grand Caravan RT 1997 Civic