I replaced the timing chain on my Nissan Almera last year. It cost me £500. Now I've got the same problem again! Nissan quoated me £1700. The car is not worth that much.
My advice to you, don't bother replacing the timing chain just get rid off the Nissan Almera because you'll be dealing with exactly the same problem few months later. Only the cost will be much higher.
KeepClearofNissanCars, December 2010