air leaking out of injector return washer?

[12vaddiction]

I just installed "new to me" injectors got it all back together fired up fine drove shorty no problems. Went to work today could here a ticking like an exhaust leak checked around found air pulsing out of horseshoe washers at injector 6 for the return line if anything shouldn't it be leaking fuel ? No issues other then ticking noise though doesn't run as good as had hoped Kinda confused on this one any help would be appreciated