before you do anything else to the engine check the condition of the cam belt.... even if it looks good enough to try and start the engine get it changed as soon as youve confirmed its a runner.
second thing is change the oil, crack off the injector pipes fully so no diesel actually gets to the injectors then spin the engine over on the starter to circulate the oil round the bearings before you try to fire it up..
then start to try to start it. if cam belt is good work through the diesel line from the tank checking you get diesel at every stage....dont forget new diesel filter before you start.
second thing is change the oil, crack off the injector pipes fully so no diesel actually gets to the injectors then spin the engine over on the starter to circulate the oil round the bearings before you try to fire it up..
then start to try to start it. if cam belt is good work through the diesel line from the tank checking you get diesel at every stage....dont forget new diesel filter before you start.