When do I have to replace or repair the timing chain? on 2002 Saturn LW200

A mechanic told me he would look this up for me. My car makes a whiny sound.

Asked by for the 2002 Saturn LW200
You will start getting signs of wear by noises from the timing chain. loose chain, tensioners making noise and water pump problems. Mileage is not always the factor as much as listening to the story the engine is telling. The key is don't wait when the signs start, this is a interference engine. It is much cheaper to fix before the chain jumps then after.