The seats look nice and clean too. I looked under the nuts after tightening and can see that they are not bottoming out. The injectors appear to be old rebuilds with the rubber bands on them. The injector lines I pulled were from turbo engines with MW injection pumps, which I have. I tried again just threading the nuts down without putting pressure on the pipe and that didn't work either.

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1984 300D Turbo 200K