1966年8月,经过全面更新的兰鸟牌小客车装用了新型L13型和L16型发动机。和原来的J型和R型发动机相比,除了把曲轴由3支承改为5支承及将顶置气门的驱动方式改为顶置凸轮轴驱动方式外,为了使发动机获得更高的性能指标,大约用了4年时间对该系列发动机进行了一系列的改进设计和研究。提高发动机的动力性由于采用了顶置凸轮轴,因而获得了重量轻、刚度大的气门机构;同时由于采用了阻力 In August 1966, the fully renovated Bluebird minibuses were fitted with the new L13 and L16 engines. Compared with the original J-type and R-type engines, in addition to the crankshaft from 3 to 5 bearings and support the top valve to the overhead camshaft drive to drive the way, in order to make the engine to achieve higher performance targets, It took about 4 years to carry out a series of improvement designs and researches on this series of engines. Improve engine power due to the overhead camshaft, resulting in light weight, high stiffness valve train; at the same time as a result of the use of resistance