it can be done but would be in your interest to remove front end and radiator for access,top landing panel held on with six 10mm bolts plus two 10mm nuts for radiator mounts,drain radiator and remove hose clips and lift out.normal r/h thread on viscous fan,may need a shock with a chisel to remove,remove fan belt,p.a.s belt and torx 40 bolts holding on timing cover.Three timing pins are required,12.7mm pin for the crankshaft into flywheel behind fuel filter,8.25mm pin for camshaft and 9.5 mm pin for pump but may be a smaller pin depending what type of pump you have,if you cant source pins mark each pulley with paint/marker fluid before you remove the belt but make sure every mark lines up after installing new belt,17mm bolt on tensioner and this is spring loaded and tensions itself,give engine a couple of turns with 18mm socket on crank pulley and re pin or make sure all marks line up and re assemble in reverse
cdc, December 2010
