New glow plugs, now it starts worse!

[macro]

Interesting! So the inner, small o ring gets popped out? Have you done that?

[Growlerbearnz]

Just to be clear: I believe you remove the inner O-ring *and* the the metal carrier it lives in by bending up the tabs. I've had to do it once, a long time ago, but I'm sure I remember some satisfying destruction.