It's just called a bolt extractor I think?
New tensioner arrived today (only took 8 days ffs):
C14SE Tensioner by
Jibijib, on Flickr
The tensioner is sprung - the old one's spring was totally seized!
C14SE Tensioners by
Jibijib, on Flickr
Removed all that rust:
C14SE Cambelt Change by
Jibijib, on Flickr
Here's tensioner in place - you'll need to remove the cam pulley before hand, but everything else can be put on before you put the rear cover on.
C14SE Cambelt Change by
Jibijib, on Flickr
There's a lug hole on the block just to the bottom left of the bolt hole - the metal hook/lug on the tensioner sits in here to keep it still:
C14SE Cambelt Change by
Jibijib, on Flickr
You need to 'lock' the tensioner before you put the belt by putting a rod through the two holes in the sprung mechanism (otherwise there's no slack to get the belt over).
C14SE Cambelt Change by
Jibijib, on Flickr
Once the belt is on, tighten the water pump bolts up to ensure it doesn't move, make sure the two timing notches are lined up (top of cam and bottom of crank), and turn the crank bolt twice to rotate the engine 720 degrees. The notches will be lined up unless you've done something wrong. If it jumps a bit, you won't damage the engine.
Loosen the water pump bolts, and I'd really advise using that Sykes-Pikavent tool to rotate the water pump to set the tensioner. The pulley on the water pump is eccentric, when you rotate it with a suitable wrench it tightens or slackens.
C14SE Cambelt Change by
Jibijib, on Flickr
The purpose of adjusting the pump is to set this up - the little markers on the tensioner. Turn it clockwise and the belt applies pressure to the sprung mechanism, and when they are lined up like this:
C14SE Cambelt Change by
Jibijib, on Flickr
The tensioner is set, and you need to tighten the water pump up to it's proper torque rating. This is tricky without applying pressure to the belt (which knocks the tensioner out), and not sure if that tool will help. Found it very difficult using a wrench.
This only took 10 minutes and the car was running again. I have to take the lot off again to put new covers on, as the bolts were seized so I broke them off.