Suction valve seat lubricating apparatus

In a diesel engine including a plurality of cylinders, a turbocharger, a compressor driven by the turbocharger for compressing a suction air, a suction manifold connected to the compressor, a plurality of cylinder heads each having a suction port and a valve insert with a valve seat formed therein, each suction port being connected to the suction manifold and a plurality of suction valves each adapted to intermittently seat on the respective valve seats wherein said cylinders are divided into first and second groups each group having a plurality of cylinders with different phase of suction strokes from one to another and having no overlap therebetween;

• a suction valve seat lubricating apparatus comprising a partition wall disposed in said suction manifold dividing the same into first and second chambers, said first chamber being communicated with said first group of cylinders and said second chamber being communicated with said second group of cylinders, and a pair of lubricant supply means each connected to and open within said first or second chamber for supplying lubricant thereinto whereby supplied lubricant may be carried by the suction air to the respective valve seats sequentially so as to lubricate the same.