* Worn or broken distributor gear: This is the most likely culprit if the distributor itself is not turning.
* Camshaft issues: A problem with the camshaft itself (e.g., broken or seized) would prevent the distributor from turning.
* Distributor shaft problems: The shaft inside the distributor could be seized or damaged.
* Timing belt/chain issues: A broken or severely slipped timing belt/chain would prevent the camshaft, and thus the distributor, from turning.
Before attempting any repairs, it's crucial to diagnose the *reason* the distributor isn't turning. A simple visual inspection of the timing components and the distributor itself is a good starting point. If you're not comfortable working on engines, taking it to a mechanic is strongly recommended.
