气门间隙的调整应在冷车上或停车15分钟后进行.1.检查摇臂座固定螺母的紧度,必要时用147—176.6N.m的力矩拧紧.2.用摇把转动曲轴,观察第四缸气门摇臂,直至该气缸气门重叠,即排气门没关上,而进气门开始打开.3.从飞轮壳体上拧下定位销,将其设有螺纹的一端插入同一孔中直至顶到飞轮上.4.按住定位销,慢慢转动曲轴,直到定位销进入飞轮的孔中,飞轮在这个位置时,第一缸活塞正处于压缩行程的上止点. Valve clearance adjustment should be carried out after the cold car or parking for 15 minutes .1 Check the tightness of the rocker seat nut, if necessary, with a torque of 147-176.6Nm tighten .2 crank with the crank to observe the fourth Cylinder valve rocker arm until the cylinder valve overlap, that is, the exhaust valve is not closed, and the intake valve begins to open .3. Unscrew the positioning pin from the flywheel housing, threaded end into the same hole until the top To the flywheel .4. Hold down the dowel pin and slowly rotate the crankshaft until the dowel pin enters the hole of the flywheel. When the flywheel is in this position, the first cylinder piston is at the top dead center of the compression stroke.