231212F001 Hyundai / KIA CHAIN SPROCKET-CRANKSHAFT, Price: 22.88$, Weight: 0.3kg

Crankshaft Timing Chain Sprocket for Hyundai & Kia Engines ⚙️

This crankshaft-mounted timing sprocket is a key drive piece in the engine timing system. It is needed to transfer rotation from the crankshaft to the timing chain, so the camshaft(s) can open and close the valves at the correct moment. When engine timing is accurate, you get smooth idle, good power, and stable fuel economy ✅.

How It Works ?

The sprocket is press-fit/bolted to the crankshaft nose and has precision-cut teeth that mesh with the timing chain. As the crankshaft turns, the teeth pull the chain evenly, keeping valve timing in sync with piston movement. Proper tooth profile and hardness reduce chain slap and slow down chain stretch over time.

What Happens If It’s Worn or Damaged ❗

A worn tooth pattern, cracks, or a loose fit can cause chain noise, timing drift, misfires, hard starting, and loss of power. In severe cases the chain may jump teeth, leading to bent valves and major internal engine damage ?. If you notice rattling on cold start or timing-related fault codes, inspect the sprocket and chain system promptly.