Cylinder Head Assembly: Description and Operation

DESCRIPTION





The cylinder heads on the 3.0L V-6 Diesel Engine must withstand high thermal and mechanical loads due to the high specific output and combustion peak pressures of up to 175 bar (2,540 psi). The cylinder heads are of a cross-flow design and have the following features:

- High-Strength Cast Aluminum Alloy Construction.
- Four Valves per Cylinder.
- Roller Finger Followers/Lifter Assemblies.
- Pressed-in Valve Guides and Valve Seats.

The 3.0L aluminum, overhead valve cylinder heads are made of high strength aluminum alloy and are each equipped with two camshafts, roller finger followers/lifter assemblies and four valve technology. The cylinder head itself is not resurfacable. The cylinder head uses a Multi-layered Steel gasket for sealing.

The valve seats and valve guides are not serviceable. The position of the valves in relation to the cylinder head surface is measured to determine if excessive wear exists. This dimension is referred to as valve setback. If the setback dimension is less than what is specified, replace the cylinder head.