The 2.2L Chevy engine is generally considered a non-interference engine. This means that the pistons and valves are designed to not collide even if the timing chain breaks. However, this doesn't mean there's zero risk:
* Partial interference: While a catastrophic collision is unlikely, some valve-to-piston contact *might* occur depending on the exact position of the crankshaft and camshafts at the moment of failure. This could result in bent valves or other minor damage.
* Other damage: A broken timing chain can cause other damage beyond valves. The chain itself can damage components in the engine, and the sudden loss of timing can lead to bent connecting rods or crankshaft damage.
In short: While the risk of major valve damage is lower in a non-interference 2.2L Chevy engine compared to an interference engine, there's still a possibility of some damage. It's best to assume some degree of engine damage and have a professional mechanic inspect the engine thoroughly after a timing chain break. Simply restarting the engine after a timing chain break is strongly discouraged.
