Renault Megane Mk4 1.3 TCe timing chain noise
A rattling or ticking noise from the engine on cold start, disappearing after 30 seconds as oil pressure builds. The 1.3 TCe engine (H5H) shared with Mercedes-Benz has a known timing chain tensioner sensitivity to oil viscosity. Using the correct 0W-40 or 5W-40 fully synthetic oil and changing at 10,000 km intervals rather than the stated 15,000 km significantly reduces the chain noise. If the noise persists when warm, the tensioner requires inspection.
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