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Fuel injectors not sealing properly

Tiny
KLLER256E5
  • MEMBER
  • 2005 SCION XB
  • 2.2L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I replaced the fuel injectors on my car and I can't seem to get them to seal right. Is there a torque spec or something that I'm not doing right that is it keeping leaking gas out the top? I've tried a different gaskets on it, I'm just not quite sure what to do with it anymore.
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Friday, February 8th, 2019 AT 10:59 AM

16 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Fuel injectors should have nitrile rubber o-rings on top and bottom of the injector. When installing the injectors into the fuel rail and the intake manifold or head, wherever the bottom gets pushed into, you should lightly grease the o-rings and make sure that they go into where they are going snugly and solidly. Ensure they are pushed into their sockets all the way. Tighten the fuel rail fasteners to specs and you should have no problem with them leaking. I hope this helps.

Thanks,
Alex
2CarPros
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Friday, February 8th, 2019 AT 11:15 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,968 POSTS
Hello,

Here is a guide to help walk you through the steps of changing the fuel injector and instructions and diagrams below so you can see how to do the job on your car:

https://www.2carpros.com/articles/how-to-replace-a-fuel-injector

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Friday, February 8th, 2019 AT 12:16 PM
Tiny
KLLER256E5
  • MEMBER
  • 3 POSTS
Thank you very much.
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Friday, February 8th, 2019 AT 12:19 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,968 POSTS
Let me know how it goes :)
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Friday, February 8th, 2019 AT 12:58 PM
Tiny
KLLER256E5
  • MEMBER
  • 3 POSTS
It was the top of the number two injector the o-ring was pinched. Thanks for the help guys I really appreciate it.
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Friday, February 8th, 2019 AT 6:40 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,968 POSTS
Nice work, we are here to help, please use 2CarPros anytime.
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Saturday, February 9th, 2019 AT 6:09 PM
Tiny
ALFREDM8702
  • MEMBER
  • 109 POSTS
  • 2005 SCION XB
Ok my xb needs injectors and I have some new injectors for at tc will the fit?
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
We only recommend direct fit parts. Chances are there is a difference between the ones in the car and the new ones you have.
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
ALFREDM8702
  • MEMBER
  • 109 POSTS
I check online and they say the tc has more ccs will that matter?
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Yes, the computer in the vehicle won't compensate for the difference.
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
ALFREDM8702
  • MEMBER
  • 109 POSTS
OK thank u
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Glad to help
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
JIM4SAIL
  • MEMBER
  • 2 POSTS
  • 2006 SCION XB
  • 4 CYL
  • 42,000 MILES
First let me confess, I made a mistake. I loosened the fuel injection rail by mistake, and fuel began to spray all over. I immediately tightened it, but I can't get it to seal. Every time I start the car it sprays a lot of gas in just seconds. Seems to be worse on the injector at the 1st cylinder, but might be spraying from others. Help!
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You need to check every injectors O-ring/seals-might not be seated
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Saturday, February 9th, 2019 AT 6:09 PM (Merged)
Tiny
JIM4SAIL
  • MEMBER
  • 2 POSTS
Thanks for the reply. I'll pull the rail tomorrow when I have more light. I'll let you know how it goes. Can the o-rings be reused if they're not cut or do they need to be replaced if the seating of the o-ring is lost?
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Saturday, February 9th, 2019 AT 6:10 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Best you replace it all-
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Saturday, February 9th, 2019 AT 6:10 PM (Merged)

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