How do you change the glow plugs on a Mitsubishi 2.8 tdi?

Fairly straightforward to change the tdi glow plugs. They are located on the near side of the engine and the first thing to do is give them a good airblast to remove any debris and stop it falling into the glow plug hole after you've remove the plugs. Next loosen the top nut on each glow plug and slide away the connecting bar. Remove the plugs the same as you would spark plugs (ie with an appropriate size socket) and replace them with new plugs. Make sure top nuts have enough space to slide the connecting bar back into place - tighten holding nuts. Job done.