assuming you know where they are - 4 plugs located underneath the injectors. The glow plugs are the smaller plugs with a electrical wire running between them. Change each plug seperately. Undo the wire at the end of the plug 8mm poss 10mm spanner. Pull of the wire. Carefully undo the plug, if it is very tight try tightening it first - just to move it a little then undo. I think you can get them off wiht a spanner 12mm maybe 14mm - ages since i did it. Pop the new one in, being very carefull not to cross thread, tighten with fingers first, then tighten with spanner but do not overtighten.
sam, November 2007
