Boost leak results - Injector seals or Intake manifold?

[majik2k5]

Straight to the point, I finished boost leak testing my car late last night, and found that I had two significant leaks, one being where my boost gauge was tapped in as the t-fitting wasn't big enough to seal, and a second coming from the injector #3 (counting from left to right from the CAS). After replacing the injector insulator I tested it again with the soapy water method and was still noticing bubbling in the same area. I gave the car about 10 minutes to warm up to see if the seals would seat, and there was still some bubbling. At this point, however, I'm unable to tell if it's coming from the injector seal or the intake manifold itself being as they are so close to each other. Does anyone have a more specific way of testing this area? Really don't want to pull my intake manifold off unless I have to. Any input would be greatly appreciated. Thanks in advance.

 

[gerardomendoza]

have you checked the torque on the intake bolts?

 

[majik2k5]

Intake bolts are torqued to specs. Don't want to chance breaking them. That's not a headache I want to deal with.

 

[dUo-sx]

swap injectors just to see if this changes anything, probably wont since you changed insulator but worth a try. You could always try switching the black spacers around that hold rail to see if this may balance it out and form a tighter seal when bolts are torqued down again. btw how much boost are you pressurizing to?

 

[schalk35]

Try replacing the rubber o-ring and the grommets that go into the intake manifold also. Make sure that you use a little bit of petroleum jelly so you don't tear the o ring.

 

[liquidsilver]

swap injectors just to see if this changes anything

Probably your best option at this point.

And if you are using the stock fuel rail spacers this would be a good time to glue them to your rail or to the head with grey RTV or similar.

 

[majik2k5]

My spacers are already siliconed on. The grommets are brand new as well. I'm only pressurizing to 10 psi, but I built a manual BL tester so I just pressurize it with a hand pump and the results are immediately noticeable. I think I'm going to end up taking the intake manifold off, I was dreading it but it looks like it needs to be done.

 

[majik2k5]

On a side note, I noticed today that after the car warms up the boost leak seems to be more significant, leading me to believe that it's the manifold gasket that's leaking. I guess it had to be replaced sooner or later.