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Leaking Injectors

R31 Gagz

By R31 Gagz,
in Engines & Forced Induction

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R31 Gagz Collaborator

R31 Gagz

Posted
Posted

Hey All,

Got an R33 N1 RB26 with Sard 800cc injectors but the fuel is leaking past them back into the engine bay. Its only a small amount, leaving the area around the injectors a bit grimy but it does seem to be affecting my A/F ratio, making it run lean at high revs.

Would I just need to screw them in a bit harder, replace the O rings? (even though they should be new, unless the old ones or wrongs ones were used as they were installed before I bought the car) I dont think it would be a hard job, is there anything I should watch out for?

Cheers!

Gagz

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STATUS Grand Master

STATUS

Posted
Posted

i bet whoever fit them used the sard o-rings instead of the factory o-rings..... same issue happens if you do the same with blitz injectors. If in doubt fit new o-rings.... probally 5 bucks at the most. remmber to visit your bedside table and vas them up before fitting too :D

R31 Gagz Collaborator

R31 Gagz

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  • Author
Posted

Hey Uras,

Thanks for that info, is there anyone on SAU that sells the OEM o-rings? Got a Nissan dealer here but they are pretty dodgey. Also is it just a matter of disconnecting the injectors (after depressurizing the fuel system), removing them and putting the new o-rings on, and coat them in vaseline (thats what you meant when you said vas them?) and reinstall? If so then I can do that easy.

Cheers!

Gagz

RANDY Veteran

RANDY

Posted
Posted

If he's talking about the o-rings that seal between the injector and where it seats... then yes.

If you can remove them with the fuel rail intact, then you probably don't need to depressurize the system either.

I did it on my last car (commodore) after leaving it overnight... so when I did pull them out, they didn't squirt fuel everywhere.

  • 1 month later...
R31 Gagz Collaborator

R31 Gagz

Posted
  • Author
Posted

Hey All,

Update on the leaking injectors....got some new OEM orings in, going to try and fit them tonight. I have some new info as well on the matter, been talking to Ben at Racepace and he has informed me that quite often its a case of the aftermarket injector not seating all the way in and causes injector leak. To fix it you need to fit a spacer between the fuel rail and injector to push the injector fully in, Ben said you can get a little spacer piece from Enzed that fit perfectly.

Will let you all know how it goes.

Cheers!

Gagz

  • 6 months later...
Owgasm Grand Master

Owgasm

Posted
Posted (edited)

Anyidea of the size of the orings or a place to buy them?

Well, the type of places that sell them.

Try to find a place around here that is similar.

Didn't notice how ancient this was, but its better than me opening up another thread... i think..

Edited by Owgasm
GeeTR Grand Master

GeeTR

Posted
Posted (edited)
lol i bought high temp neopreem ones from a bearing and seal place i bought 20 for under 3 bucks, and they have been working fine for ages, take the injector and the rail with you

Neoprene, I thought, wasn't petroleum / hydrocarbon resistant?

They are Viton or nitrile butadiene.

Edited by GeeTR
DECIM8 Grand Master

DECIM8

Posted
Posted

Neoprene is wetsuit material?!

Guys ring 0412 013877 in sydney comes to you and will be able to sort you out.. john i think his name was

No one on this forum gave straight answers he does flow test, cleaning and injector seals. have not used him as yet but he quoted me $120 for the whole service.

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