I must've misunderstood him and thought he was talking about debris falling into the injector ports.
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Well from what i seen none of my injectors had orings on them.. there is a groove about half way down the injector body but no orings present..
Mine seemed more like they were locked from water rather than carbon but thats just based on how they looked upon removal .. especially seeing 3 came out very easy and 1 with not much more then some sideways twisting..
Cheers Bulletman