IamRobbyah

My mechanic ordered me the "insulators" when I asked if he could order me the grommets. Are these the same thing?

bajaman

Insulators are commonly the phenolic pieces that fit down inside the block and diffuse the fuel. Grommets are the rubber flat-'O' rings that the injectors nest on, that fit on top of the block in a small recess.
Typically, anyway.

IamRobbyah

I do believe I have the right piece. Thanks baja.

And these only go on the secondaries, right?

bajaman

No, there are insulators on all 4 injectors. The secondaries are a little more 'buried' than the primary ones.

bajaman

Okay....just to get terminology correct. On page F-105 of the Factory Service Manual, it shows "insulators" to be the rubber grommets/'O' rings that the injector carriers rest against. The fuel diffusers or "air bleed sockets" are the pieces that fit down inside the block on the primaries and inside the LIM on the secondaries.
Sorry for any confusion.

IamRobbyah

Thanks again baja. I, also was looking at the manual, but maybe I think about it too hard, cuz it makes sense only half the time...

charliegt

For the record, I think that the FSM and parts diagrams are misleading. After looking over them I had a conversation with Ray at Malloy and the injector insulators for the primary are different than the secondary (which the parts diagram reflects in part numbers, but they look the same in the illustration). The primaries get an insulator that goes around the lower part of the injector, and the secondary insulators seal between the tip of the injector and the lower intake manifold.

-Charlie