Hi.
new to forum. 1st post. Greetings.

Got a knocking on my engine comming from top end. Starts at around 2000 rpm. Goes around 3500rpm.
Before and after that engine sounds sweet.
Removed injector plugs one at time and found knocking goes when number two is removed. So i swapped number 2 injector for number 4 hoping the knocking would move to number 4, but its stayed with number 2 but still disappears when you remove the injector plug.
It sounds like a loud diesel knock.

Anyone any ideas as i,m due to go on holiday with it in a couple of weeks.

Thanks
Richard