Ongoing engine overheating

Thermostat housing and just visible restrictor plug in hose
Restrictor plug and associated gunk

Another go at overheating problem. This clean out has reduced the temperature indication somewhat. During engine runs indication of fuel starvation, engine losing revs. Hmmm, hope its not a sign of more significant trouble. Changed diesel filter and despite erratic rpm it seems to settle down OK. Need some more thought and engine test runs. Oh brother, its a pain to bottom this out.

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