Alex,Me being the bad news guy,Im sorry to say with the best of luck at DYI it will take the best part of a day,you will need to remove the intake manifold and all the assorted plumbing and wiring associated there with,and you will need a set of star socketd ,also a set of allen sockets,along with a set of metric sockets,then have a manifold gasket on hand,and last but not least lots of patience,and watch what you are doing,and if the glow plugs comes out without breaking off will show that your Carma is right that day,get you some pb blasterand give it a goos shot a day before the attack,then the day tour are going to do it give it another shot and get the eng up to operating temp the go for it,and good luck.
Tom