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Latest build: Dame 190 in Rot•Question: How do I spot a genuine 2.5-16 Evolution II versus a clone?•Classified: €1.950 · Genuine 16in Evo I “Aero” wheels, refurbished•Latest build: Dame 190 in Rot•Question: How do I spot a genuine 2.5-16 Evolution II versus a clone?•Classified: €1.950 · Genuine 16in Evo I “Aero” wheels, refurbished•
Ask the community · Cosworth & 16v

Is a faint cam-chain rattle on cold start normal on the 16v?

Asked by Sandra K. · Juni 15, 2026 · 2 answers · Resolved

First second or two on a cold morning I get a light top-end rattle that disappears once oil pressure comes up. M102 2.3-16. Tensioner, or just live with it?

2 answers

Tom B. Juni 15, 2026 ★ Best answer

A brief rattle on cold start is common as the hydraulic tensioner bleeds down overnight. If it persists past a couple of seconds or gets louder, replace the chain tensioner and check the rails. Cheap insurance on these heads.

Marco R. Juni 15, 2026

Mine did exactly this. New tensioner sorted it completely. Do it before it eats a rail.

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