Fuel leakage after fuel injector installation

Ibte use the orange or pink colored o rings as many times as I do injectors hopefully once . The black o rings I replace thyre usually the uppers in the rail colored at pintle end I believe

 

Lubing the rail o rings helps seat them in rail . Manifold end usually needs nada

 

Yes and I lubricate the o-rings that go into the rail the black ones I can't buy orange pink units . So they must be a better material or such . The replacements are black and from China Asia . So are the colored but they must be something to it . I never see the colored o rings fubar but black can be destroyed why material I'm guessing . The rail isn't crazy hot or such . Intake manifold maybe . Hence better quality o ring needed ?

 

No no no no no no no oh my goodness no don't do that.

The ends that go in the fuel rail have O rings. Put those ends very carefully into the fuel rail first, lubing and twisting as needed.




The bottom ends that sit in the cylinder head sit in simple grommets. It's easy to get those ends in, as you install the rail with the injectors' O-ring ends already carefully inserted into it.

If you put the injectors in the cylinder head first and then try to get the fuel rail installed over them, you take a significant chance that the O-ring ends won't go into the rail right.

If you then try cranking down on the fuel rail bolts thinking "this'll make 'em go in", you will, if you are lucky, only destroy some O rings, and if you are less lucky, you will destroy some injectors.

 

If you're doing this then it's your first time or whatever because you're doing it this way you wiggle the rail side to side gently and you feel the rail slip down over the o-rings and you hear almost a squeak as rail seats. But the manual chap showed is the factory way . I'm guilty of the slide the rail down been doing it since EFI . Whoops. So far neva a leak

 

I'll do it the repair manual way every time, thankyouverymuch. I'm happy for you that you've succeeded with the just-crank-down-on-it approach, but I've had to help enough PriusChat posters who didn't get away with that to put me off suggesting it to anybody.

 

We used to do that at repair shops on the BMW the m3s and all of that and the manual for those that's how they show them doing it I just thought that was the way it was done for the most part oh well.. it's not just whacking it down with a hammer or such . Gentle squishy rocking motion over lubed o rings .plop. can also set the injectors in rail flip it holding w fingers guide orange o rings into manifold . No matter. Just depends what I grabbed first or holding in my hand I guess.