What's making this noise?

I’d be worried if my 1951 Ford F100 with a 239 flathead V-8 made that noise.

Why don’t people tell us what they are working on?

Make - Ford

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It’s a Ford Focus C-Max 1.6 TDCi from 2006.

I don’t hear whining but I do hear a fast cadence clicking. You might need the tappet clearance gap checked and reset.

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