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Mini TSB #M110413
2009 Mini Cooper S
TSB Document:
Affected Component: ENGINE AND ENGINE COOLING
- Summary
- Service Action: N14 Engine Check Timing Chain Tensioner and Timing Chain. The timing chain tensioner applies pre-tension to the timing chain guide rail mechanism. In some cases, the tensioner spring force may be too low. Depending on the severity of the wear, it may lead to a rattling noise when starting the engine cold or when the engine is idling. CAUSE The timing chain tensioner internal tolerances are not consistent.
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