Advice on cleaning ZD30 injectors please

[mihit]

Thanks, i will take on board what you all said,,,, theres been more than one time in my 67 yrs that ive said to myself. "That would have been fine if id left it alone"
That said what I intend to do is refit the injectors , but not down into the engine but sticking straight up. crank it over and observ the spray, if they are reasonable ill refit them , if they look bad ill get a specialist to service them.
Thanks for the good advise.

That's not silly. And is reasonably safe on a direct-injection. (DI sees 1/5th the PSI that common rails use)
Just be very careful to keep yourself out of the way of the spray/nozzles as even a few thousand PSI will push diesel through your skin and into your bloodstream (google injection injury) which will really ruin you day.
And safety specs/eye protection.

Also the usual sensibilities about having your assistant light your cigar or pipe well away from the work area, and not to make or break any electrical connections or otherwise cause sparks while there's atomised diesel about...