AAZ injector refresh

[chalkywoods]

I've been trying to get my AAZ running and starting a bit smoother and since 3/4 of my injectors had green waxy gunk seeping out I thought I'd pop them out and see what I can find.
Injectors all came out fine. There isn't anything obvious wrong with nozzles 1-3 (I know that doesn't mean much) but nozzle 4 looks damaged on one side. There's a lot more carbon buildup on that side too:

The sealing washers on 1-3 came out easily too and I found my first issue, I can see the glow plugs sticking into the swirl chamber on 2 & 3, but not on 1! Can they snap off or erode somehow? Will be changing them either way but I wonder where that bit is now

The real issue is that 4th cylinder:

That sideways spray has wrecked the sealing washer and I can't get it out, I'm wondering if it's melted or welded itself to the cylinder head? Has anyone had anything like this before?

[davidoft1]

The heater plugs fail and disintegrate

You need to clean all the carbon etc off the washer , they get well stuck in, I usually put podger bar down the middle and do big circles , they generally come free

[chalkywoods]

Some scrubbing and a modified screwdriver did the job. 4 siezed Injectors and 2 disintegrated glowplugs as a result! All sorted now. Thanks for the tips!