Hi I have a 'T' plate 99 Terrano Extreme 2,its looking like the rattling around the front of my engine is the timing chain that needs replacing ,the job is probably too big for me to tackle so my boss at work is going to do it.The question is...which engine model number is it I should order parts for please?....its a little confusing!!!....any tips or advice would be very gratefully received...many thanks!!!