Beginning in 1986, Chevrolet upgraded the original small block to a one-piece rear main seal and also modified the block to accept a hydraulic roller cam. Rather than using linked hydraulic roller lifters like the aftermarket, Chevrolet used pairs of what are called dog bones that...
athe head is configured to be fitted as a single overhead cam with hydraulic lifters 头用水力起重器配置适合作为一个唯一顶上的凸轮[translate]
During operation (i.e., when the main camshaft rotates), the valve movement end of the rocker moves in manner which results in each valve being moved upwards and downwards as a function of the cam duration and lift, thereby opening and closing each respective valve....