The tensioner has a special tool 3366 to compress it so you can get everything apart. New tensioners should come with this tool holding them together in transit, but its worth buying another one to remove the old tensioners as they are very cheap.
You'll also need a 5Nm torque wrench for the cam cap bolts. They are 5Nm + 90 degrees.
Tip: hit the top of each cam cap bolt with a hammer using the T30 torx tool as a drift before you try and remove them. They aren't tight, but they have so much stiction in the head it is very easy to strip the heads, snap the T30 tool etc. Hitting them lightly just cracks the stiction and then they come out easily