I know this might sound ridiculously no0b-ish, but I've never worked with a fuel system previously to the 7.

With that said, I've had the injectors cleaned and everything replaced. And I was just wondering, when I was reading the FSM it said that the injectors need the O-Rings replaced.

Now the O-Rings at the top of the injectors were replaced when I had them cleaned. My question is, do I have to remove this piece(circled below in white) prior to installing them in or do I leave them in? Do I have to put another O-Ring in the fuel injector ports on the block and LIM?



Again, sorry for the Noob question. *Puts on flame suit*

 

yes, you leave those on. they look ready to drop in as-is

 

those are the injector "gromets" they seal the injector to the center housing or LIM depending on the postion (secondarys or primarys)

 

Great. Thanks guys. That's all I needed to hear!

 

I would say you need to get new ones. I had a serious vacume leak on the secondaries cuz the grommet was too hard and did not seal adequately.

 

his are new...

 

Both the O-Ring at the top and the ring circled in white are new. I had these injectors cleaned and rings replaced.

 

No one has mentioned it, but you need to lube the gromit and o-ring before injector installation. Use petroleum jelly or grease. Otherwise the upper o-ring can easily tear when inserted into the fuel rail.

 

Per FSM, I coated both with a little fuel. Would that be sufficient?

 

Might be. Fuel is a very poor lubricant compared to an actual grease. I've never used fuel, only petroleum jelly or grease.

 

I use oil.