Don't know if your 02 has the 'Ecotec' engine or not. If it does get the updated timing chain oiler ASAP! The early Ecotec's have pretty marginal chain oiling (hole was too small) and by 160k you're WELL into the 'danger zone' of a catastrophic failure (valves crash into pistons). Realistically, a full timing set would be a wise investment.
Just a heads-up.
