Technical features
How to check the tappet clearances
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These are checked between the top of the tappet and the rocker lever (A1). For D3.152 engines the correct clearances are 0.30 mm (0.012 in) for inlet and exhaust valves with the engine cold. For 3.1524 and T3.1524 engines the correct clearances are 0.20 mm (0.008 in) for the inlet valves and 0.32 mm (0.0125 in) for the exhaust valves with the engine hot or cold.

