柴油机气门漏气会造成功率下降、启动困难等故障。判断气门漏气,可采取以下方法检查。一、卸下汽缸盖罩、空气滤清器和排气消音器,但要确保进、排气管路连接部位的可靠密封。二、检查进气门密封性。缓慢摇转曲轴,注意观察排气门的动作,当排气门将要开启时暂停摇转曲轴。用手掌盖严进气管口,继续摇转曲轴,直至排 Diesel valve leakage will cause power loss, start-up difficulties and other failures. Judge valve leakage, can take the following method of inspection. First, remove the cylinder head cover, air cleaner and exhaust muffler, but to ensure that the intake and exhaust pipe connections reliable seal. Second, check the intake valve seal. Slowly crank the crankshaft, observe the exhaust valve movement, when the exhaust valve will be open to suspend the cranking crankshaft. Strictly cover the air inlet with the palm of your hand and continue cranking the crankshaft until it is in the row