Replaced:

big top o ring
small bottom o ring
rubber seat
air bleed sockets

I coated them with oil and reinstalled them... and now the primaries are still leaking... I can smell it and see a little bit of fuel on top of the injector holder...

what else could it be?? the injector itself??

 

Yes. At 64K, I had leaks from primaries and secondaries. Tried new o-rings, still leaked. Tried thicker o-ring, tried hylomar seal. Nothing worked.

Turns out the injector body becomes heat damaged and the interface between the metal body and the plastic housing deteriorates. The only fix is to get new injectors. They're not cheap at $200 each.

 

Or you can get them rebuilt by rc engineering

 

rc engineering cannot rebuild injectors that are externally leaking... which, sounds to be your case.

I recently sent my injectors of to them as well to have them rebuilt. All but one were okay and they cleaned to run close to 100%. One of them was exteranlly leaking and they cant do anything about it.