Injector Leak
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This is a discussion on Injector Leak within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I recently put in new injectors and about 2 weeks, but I recently needed to remove them due to some ...

  1. #1
    Registered User mav3rik64's Avatar
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    Injector Leak

    I recently put in new injectors and about 2 weeks, but I recently needed to remove them due to some bad fuel, upon re-installation, the injector for cylinder 2 was leaky, so I re-seated it and that fixed the problem. The next day, I encountered the same problem but with injector number 3, so instinctively I removed it and checked the o'ring for cracks and stuff, then put it back in, unfortunately this time it didn't solve anything. Next i'm gonna switch around the injectors on that side and see if that fixes anything. Also, the grommet that buffers the fuel rail and the injector was loose and would move a little, whereas the other injectors were not. Any help on the matter would be appreciated as this is getting quite frustrating. Thanks

    And for mods, I just have a stock 2003 wrx.
    A.K.A. The Stig

    "Some say, if he caught fire he would burn for 1000 days, and that the outline of his left nipple is exactly the same shape as the Nurburgring....all we know is, he's called The Stig" - Top Gear

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  3. #2
    Registered User mav3rik64's Avatar
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    And it's a leak from the top of the injector where it connects to the fuel rail
    A.K.A. The Stig

    "Some say, if he caught fire he would burn for 1000 days, and that the outline of his left nipple is exactly the same shape as the Nurburgring....all we know is, he's called The Stig" - Top Gear

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    Administrator Trainrex's Avatar
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    Did you bend the fuel rails when installing the injectors?

  5. #4
    Registered User mav3rik64's Avatar
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    Like bend it so much that it may not be all the way over the injector? it could be a possibility because of the tight space around the fuel rail and injectors. It seemed to tighten down ok when I re-assembled it but I'll definitely check that.
    A.K.A. The Stig

    "Some say, if he caught fire he would burn for 1000 days, and that the outline of his left nipple is exactly the same shape as the Nurburgring....all we know is, he's called The Stig" - Top Gear

  6. #5
    Registered User mav3rik64's Avatar
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    alright, well it looks like the o'ring has a little bit of a pinch so i'm gonna replace that and it should be my fix
    A.K.A. The Stig

    "Some say, if he caught fire he would burn for 1000 days, and that the outline of his left nipple is exactly the same shape as the Nurburgring....all we know is, he's called The Stig" - Top Gear

  7. #6
    Supporting Member yamaha_rider619's Avatar
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    should have replaced the o-rings the first time around... never a bad idea to change gaskets/o-rings
    Josh
    2003 Subaru Wrx Vf39'd
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  8. #7
    Registered User EvoEatr's Avatar
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    +1, Alot of techs think its just reseat it and your good to go, personally if the car ignites due to tiny slit in an injector o-ring, I dont want to have to be the tech to go out to the customer and say...I have only replaced a few injectors but always change the o-rings, or the little rubber piece at the top of the injector...

  9. #8
    Registered User mav3rik64's Avatar
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    yeah, i just did it to all four, it turns out they were all leaking the slightest bit. The o'ring that is on the injector is really only made to be put on once, and since the fuel rail and components are so close, I noticed that after pulling off and putting on the injectors multiple times, that the o'rings were all slightly pinched on one side allowing for a leak. So for anyone who may have this problem, mine was fixed by replacing the o'ring on the top of the injector after removing them for whatever you may be doing. hopefully that is a permanent fix, I'll update this post if I have any future problems with leaky injectors.
    A.K.A. The Stig

    "Some say, if he caught fire he would burn for 1000 days, and that the outline of his left nipple is exactly the same shape as the Nurburgring....all we know is, he's called The Stig" - Top Gear

  10. #9
    Moderator Donkey's Avatar
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    You should always lubricate the o-rings when you install injectors. This keeps them from getting pinched,caught or pushed of the injector seat. Vasoline or motor oil works.
    Resident Adviser @ WTF Tuning, LLC
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  11. #10
    Registered User mav3rik64's Avatar
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    ^ Yes, I used bearing grease this time. It has a surprising amount of uses
    A.K.A. The Stig

    "Some say, if he caught fire he would burn for 1000 days, and that the outline of his left nipple is exactly the same shape as the Nurburgring....all we know is, he's called The Stig" - Top Gear

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