AIR BOX DRAINS
The cylinder head (Fig. 1) is a one-piece casting securely held to the top of the cylinder block by special bolts.
The exhaust valves, fuel injectors, and the valve and injector operating mechanism are located in the cylinder
head. Depending upon the engine application, either two or four exhaust valves are provided for each cylinder.
Exhaust valve seat inserts, pressed into the cylinder head, permit accurate seating of valves under varying
conditions of temperature and materially prolong the life of the cylinder head.
Figure 1. Typical Four-Valve Cylinder Head