I am replacing the PCV system. I was able to wrip everything out today and will install the new system in the morning. I pulled the fuel injectors out and cleaned them. When I install them tommorow I want to makes sure I seat them correctly. I noticed on each injector there are 2 donut seals, 1 top and 1 bottom. Also there were a few flat seals. Still circular in shape, but not like the donuts. Should each injector have a flat seal on top, towards the injector cover, and then a donut seal on top of the injector, and then a donut seal on bottom of the injector? Or are the flat seals old ones that should not be in there? Any advice would be great. On IBSUSA.com they sell the donut seals in sets of 2 per injector. I wasn't able find out any info about the flat seals that also came out. Thanks. And when I say flat seal I am not talkng about the larger seal that goes against the manifold where the injectors connect.

 

There is a flat seal on top of the injector as you describe. IIRC there are 4 seals in all.
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Yes some cars have the seals between the top of the injector and the fuel rail.
Looks almost like a little gromet that you could install in a hole to protect a wire that is running through a hole.
They need to be there to help keep the injectors from leaking.
But not all 850's have them.

 

Thanks for the help. Cant get the grommet seals in until tommorow.