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Engine balance shaft sprockets start at $54.95 at AutoBuffy, where you'll find 1 options from brands including Cloyes. The balance shaft sprocket drives the balance shaft via the timing chain or belt, canceling out engine vibration at higher RPMs. A worn or broken sprocket causes rough running, abnormal noise, and can trigger timing-related engine damage if left unaddressed.
The correct sprocket is determined by your engine's specific balance shaft configuration — tooth count, chain pitch, and sprocket position (crankshaft-driven or intermediate shaft-driven) must match exactly. Many engines use two balance shafts rotating in opposite directions, each with its own sprocket, so confirm how many your engine requires before ordering. OEM-equivalent quality is strongly recommended here because even minor dimensional differences can throw off balance shaft timing.
| Option | Best for | What you get |
|---|---|---|
| OEM Replacement (exact-fit) | Owners who want guaranteed fitment and factory balance shaft timing accuracy | Matches original tooth count, pitch, and material spec; direct swap with no adjustments |
| OEM-equivalent aftermarket | Budget-conscious owners who still want reliable, precise fitment | Cast or forged steel construction meeting OEM dimensions at a lower price point; reputable brands tested to factory spec |
| Timing Kit (sprocket + chain + tensioner) | High-mileage engines or any build where the chain and tensioner are also worn | Complete system replacement in one purchase; ensures all balance shaft drive components have matching wear life |
| Balance Shaft Delete Kit | Performance or racing builds where smooth idle and refinement are less important than simplicity | Removes the balance shaft system entirely; eliminates sprocket failure risk but increases NVH at normal driving RPMs |
Access to the balance shaft sprocket requires draining the oil, removing the timing cover, and carefully aligning all timing marks on the crankshaft, camshaft, and balance shaft before removing the old sprocket and chain. The new sprocket must be installed with all timing marks aligned precisely to factory specifications — consult the service manual for your specific engine's mark locations and torque sequences. Reassemble with a new timing cover gasket or RTV sealant as specified, refill oil, and verify for leaks before starting.