我部一辆解放CA141型汽油机运输车,平时工作正常。在执行完一次长途(往返1500km左右)运输任务后,感觉发动机工作不正常,动力下降,并伴有明显的“突突”声,怀疑是气缸烧坏。但拆下气门室盖后发现,三缸进气门推杆已经脱出气门调整螺钉,拆下摇臂架后又发现,排气门杆位置明显高于其它气门杆。将推杆装复后摇车发现,进气门不能下行。这些异常现象引起了我们的警觉,随即开始进一步拆卸。在拆下进、排气歧管时发现,第三缸进气道处有大量铝合金粉末(其它 I am a liberation CA141 gasoline engine truck, usually working properly. After carrying out a long-distance (around 1500km round-trip) transport mission, I feel the engine is not working properly, the power down, and accompanied by a clear “bump” sound, suspected to burn the cylinder. However, the removal of the valve chamber cover found that the three-cylinder intake valve stem has been removed from the valve adjustment screw, remove the rocker arm and found that the exhaust valve stem position was significantly higher than the other valve stem. The putter loaded complex after the car found that the intake valve can not go down. These anomalies aroused our alarm and immediately began to disassemble. Remove the intake and exhaust manifold found in the third cylinder inlet a large number of aluminum alloy powder (other