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.
| Material | Steel piston in aluminium body |
|---|---|
| Spec | Stroke 12 mm |