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All parts › BMW M4 CSL › S58 engine › Timing chain › Chain tensioner

Chain tensioner

Part of Timing chain · about $140 to replace

What it is

Hydraulic tensioner with ratchet.

What it does

Keeps the chain taut regardless of wear.

How it fails

Replace with the chain.

MaterialSteel piston in aluminium body
SpecStroke 12 mm
Chain tensioner highlighted on the car

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