LB7: Injector cups need help

[Lb7joezay]

When pulling out my injectors one of my injector cups came out I changed out the orings already but I'm not sure how to put it back in or with what tool?

 

[whytry]

You need gm locktite or permatex 272 high temp high strength. That needs applied to the sealing surface on the bottom of the cup..then just use a soft object to push the cup back in and tq injector right away

 

[whytry]

And buy the way I would pull the rest out also and reseal them just my opinion

 

[07keo02]

And clean both the cylinder head and the cup well. I used a gun bore brush and brake clean. There absolutely has to be a good bond between the injector cup and cylinder bore where it taper's. Like WHYTRY said, be completely ready for installation of injectors when your done with the cups. Put them all in and torque to spec. This holds the cups tight in the bore while the locktite cures. I always let it sit over night before I add coolant and start the truck.