The tappet clearance for the Nissan TD27 engine in the Urvan is typically set at 0.20 mm (0.008 inches) for the intake valves and 0.25 mm (0.010 inches) for the exhaust valves when the engine is cold. It's important to check the service manual for your specific model year, as specifications can vary slightly. Proper adjustment ensures optimal engine performance and longevity.
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