When rebuilding an engine, or refitting a head to an engine, ANY engine, the galleries must always be checked and blown out thoroughly. The onus is on the mechanic NOT the machine shop to do this. Plugging the head ports etc is difficult and dangerous if whatever they use ends up in the cutter during machining.
We always do this, the machinist usually blows out obvious swarf etc but it has always been drilled into me to prepare the head for fitting in this way, regardless. Never rely on someone else to do it.
The injector issue may or may not be caused directly by this, the gauze filter is there to prevent ingress of particles.
Hope you get it sorted, Pete ( Psimpson7) wil steer you straight, he has quite a bit of Td5/ head experience.
JC
The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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