The turbo will come off by just removing the four nuts, but a variety off spanners are required. But be warned even with these nuts undone, it may not move. I had to whack the living daylights out of mine to break the initial seal with a soft hammer, no amount of wd40 did it. Once that seal has broken its oK, I changed my turbo 4 times in two weeks, so it can be done with just the four nuts.