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Posted by DroppedMitsu, Apr 14, 2010
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.
Sounds like they are not the right seals for the Job. Are they fitting tight to the fuel rail?
Are you smelling/seeing any gas on that side of the head
Can you take one of the injectors out and take some close-ups of the lower injector with the seals on?
Yes I have the black plastic spacers that go between fuel rail and head.
Heres a pic of the injector and seal, I tried as hard as I could to get a clear close up but my POS camera wont do any better.
The picture of that seal isn't going to help us much.
If the o-ring at the top of the injector is torn or not there, then the injector won't sit snug and straight in the head with the seal, even a little amount of space is enough to cause his problem.
Are you getting this leak on all injectors or just one?
I am starting to think these are not "OEM mitsu" seals as JNZ stated on their site since they came in a ziplock bag of four, and after looking at them closely they don't look like the stock ones that came out. The stock ones I pulled out fit way more snug around the injector then any of these new ones do, but they were just a little hard and would not seal at the head.
only things i could think of are:
1. you aren't being careful putting the insulators into the head and they aren't seating right
2. the injectors aren't correct (too short)
3. the spacers are wrong
I just replaced mine, the fit *perfectly* and I even applied a very fine layer of oil to get them installed easier.
Thanks for the info on them seating on the faces and not the side, I was wondering that. Anyways I bought an injector seal kit first and put all new seals/o rings on them. Then the injector insulators still weren't sealing so I bought OEM ones from JNZ just to clarify. I have all 3 new seals on each injector, I am 100% sure on them sitting in there flush as well as the injectors sitting flush in them. Maybe a little bit of paint buildup on underside of rail where spacers meet is not letting it tighten down enough is only thing I can think of now?
carefully and then do a boost leak test on them and see if you can get it bolted down to the point where they won't leak. it could be an intake manifold gasket from the same areas too...