Hi All,
I had my engine stethoscope out today and put it on the top of the injector (No1) , the noise was extreme, sounded like metal on metal, tried it on the block and was ok, tried other injectors and they were very noisy but more ‘dull’ sounding.

I released the fuel pipe nut on No1 to bleed it and when it was fairly loose the noise almost disappeared.

does all this sound ‘normal’

No.

Yes if it starts and runs fine, dont worry about it.