Hi and thanks for replying. The car has a 1.4 TU3 engine. I have a haynes manual and it says to use a tool to compress all the valves at once when setting the belt tension. Here's the tool on ebay http://www.ebay.co.uk/itm/LASER-TOOLS-3789-Valve-Spring-Compressor-PSA-Citroen-Berlingo-Peugeot-/151198416711?pt=LH_DefaultDomain_3&hash=item233420bf47 Is this esential? Thanks again