What is the valve clearance for a Deutz 6-cylinder engine?
2 Answers
For the Weichai Deutz 226B-6 engine, the intake valve clearance is 0.25 and the exhaust valve clearance is 0.35. The method for adjusting the valves is the same as for regular engines. Additional information is as follows: 1. Valve clearance: Valve clearance is set to ensure the proper operation of the internal combustion engine's valve train. Since the valve train operates at high speeds and high temperatures, components such as valve lifters and valve stems expand when heated, which can automatically push the valves open, causing the valves and valve seats to not close tightly, resulting in air leakage. To prevent this phenomenon, when designing the valve train, a certain gap is left between the end of the intake and exhaust valve stems and the adjusting screws on the lifters (or rocker arms). This gap is the valve clearance. 2. Reason for adjustment: Because the valves are in contact with the cylinder block, which generates a large amount of heat during operation, the heat is transferred to the valves, increasing their elongation.
I've been repairing Deutz engines for over a decade, and this issue depends on the specific model. The BF6M1013 6-cylinder engine is most common, with intake valve clearance of 0.3mm and exhaust valve clearance of 0.4mm being optimal when cold. However, the BF6M1015 model has different specifications - the manual states 0.4mm. Valve adjustment requires technical skill and must be performed when the engine is cold, following the 1-2-3-4-5-6 sequence. Last week I encountered a trucker who made a 0.1mm adjustment error, resulting in engine knocking and oil burning. Always check the engine nameplate model before working, and it's best to use OEM feeler gauges. Improper adjustment affects intake/exhaust efficiency, especially noticeable during long-haul trips when engine power drops and fuel consumption increases. I recommend checking clearance values every 50,000 kilometers.
