Workshop Manual

EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE

14.1 DESCRIPTION AND OPERAT IO N OF CYLINDER HEAD AND RELATED

PARTS

This section explains the description(s) and operation(s) of the following systems within the

cylinder head:

□ Cylinder Head

□ Valve Springs and r elated components

□ Intake and Exhaust Valves

14.1.1 Cylinder Head

The cylinder head has been designed with a compacted graphic iron material. There are two

intake and two exhaust valves per cylinder. To ensure the correct bolts are used when installing

the cylinder head, the bolt thread size 16 is stamped on the head of the bolt. All bolts must

be tightened in the correct sequence. The valve train assembly needs to be removed in order

to access the cylinder head bolts.

The cylinder head has a split coolant jacket; the coolant ﬂows around the cylinder to the inlet

side of the head and then to the exhaust side. The coolant ﬂows in the lower level of the cylinder

head around the injectors and the valve seat rings. The coolant t hen ﬂows around in the upper

level of the cylinder head and cools the valve guides. The advantage of this design is a very even

and highly effective cooling system.

1. Oil Return Openings or Oil Return Holes From

Cylinder Head to Cylinder Block

2. Oil Transfer Holes from Cy linder Block to Cyli nder

Head

Figure 14-1 Oil Hole Location on F ire Deck of Cylinder Head

All information subject to change without notice.