Are the spider injectors supposed to have sealing o-rings on manifold ends? on 1995 Chevrolet S10

my uncle's s-10 4.3 vin "W" is having a miss in cyl #2. He recently had the inj. assy. replaced. He says the injector nozzle doesn't fit snug, but locks, in the hole. Should there be an o-ring there? He says it doesn't have one.

by in Spencer, IN on December 24, 2011
1 answer 1 comment
ANSWER by on December 24, 2011
no, it just snaps in. where the injectors are is a vacuum chamber already. Roy
COMMENT by on December 24, 2011
Thanks Roy, I didn't think they did. Just wanted to make sure.