What is the valve clearance for a single-cylinder diesel engine?

[OWalter]

The intake valve clearance for the vertical 195-type diesel engine is 0.18～0.25mm, and the exhaust valve clearance is 0.20～0.27mm. However, some diesel engines use materials with lower expansion coefficients for the exhaust valves or implement enhanced heat dissipation measures for the exhaust valves, resulting in equal clearance for both intake and exhaust valves. For example, in the 195-type diesel engine, both intake and exhaust valve clearances are 0.4mm. Additional information: The function of valve clearance is to ensure tight closure of the intake and exhaust valves and to accommodate thermal expansion of the valves and their transmission components. During diesel engine operation, the intake valves are cooled by fresh air, maintaining temperatures between 300～400°C, while the exhaust valves are exposed to high-temperature exhaust gases, reaching temperatures between 600～800°C. Consequently, exhaust valves experience higher temperatures and greater thermal expansion compared to intake valves.