There's a paper/fibre washer that goes on the inside of the 110mm long bolt that goes through the (not quite centre) of the timing cover. That is it goes between the inside of the timing cover and the front of the engine. Its acts as a packer the same thickness as the timing cover gasket so that the timing cover isn't bent when this bolt is done up. A spare comes with a full timing kit otherwise use any handy washer that fits or cut up a piece of old gasket to suit.
The manual shows that the belt tensioner is done up to 15 Nm for a new belt but I reckon this has been amended but I can't remember the correct figure. It'll be here somewhere and definitely worth getting right.
Deano :)

