i'm new here so bear with me. i'm buying a 2005 spectra5 with 90k on saturday from a family member. car is currently in the shop getting a top half engine rebuild. i spoke to the mechanic today as i was concerned the timing belt hadn't been changed at 60k and the car wasn't being maintained. the mechanic said the belt had been changed but the timing chain "jumped" and damaged the pistons or whatever. he claimed the car has a timing belt AND a chain. sounds strange to me. can anyone verify?