I should think it's the same as the Mk1 Focus.
The tensioner is a self adjust tensioner.
Put a spanner around the small tensioner pulley ( not the top idler pulley ) pull back release belt,
fit new belt pull back again slip over tensioner job done.
Some times it's better to put the belt over the tensioner and slip it over the crankshaft pulley when pulling the tensioner back.
Hope this helps.
Hi thanks but its not the same as the mk1, there is no movable idler all the pulleys are fixed solid,
no adjustment, I have never seen a set up like this just seems a bit strange, regards, Steve.