To pull injectors I use a Craftsman 1 1/16" deep well socket, I have never broken a return nipple. This socket will also fit the bolt on the front of the crankshaft. When doing the cylinder drop test I mentioned above, all you need to do is just barely lossen the nut at the injector while the engine is idling. A little fuel will come out. The shims I'm looking for are inside the injector. To disassemble the injector put the top half with the two flats in a vice an use the socket you used for removal to seperate the two halfs. The shim looks like a small washer and set the pre load ont the spring that holds down the pintel. If you can come up with a bunch of nozzles cheap at the u-pull-it let me know.

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Bob D.
Parrish, FL
1 SDL, 1 D, 1 TD, 1 Mog