SERIES 60 SERVICE MANUAL The porting within the cylinder head is cross-flow, with intake and exhaust ports on opposite sides for minimum restriction and maximum exposure to coolant flow. Four valves are used per cylinder, two intake and two exhaust. See Figure 1-23. Figure 1-23 Intake and Exhaust Valve Porting Replaceable valve guides, valve spring seats, valve stem seals, valve rotators and valve seat inserts are used on all valves. See Figure 1-24. 1. Valve Guide 5. Valve Stem Oil Seal 2. Valve Spring Seat 6. Valve Spring 3. Valve Seat Insert 7. Valve Rotator 4. Valve 8. Valve Keepers Figure 1-24 Valve Guides and Related Parts All information subject to change without notice. (Rev.
2005) 6SE483 0507 Copyright © 2005 DETROIT DIESEL CORPORATION 1-33