1.2 CYLINDER HEAD 10. Remove, disassemble, and inspect the valve rocker cover. Refer to section 1.6.2, (one-piece), refer to section 1.6.3, (two-piece), refer to section 1.6.5, (three-piece) for removal. Refer to section 1.6.6 for disassembly, and refer to section 1.6.2.1for inspection. 11. Remove Jake Brakes®, if equipped. Refer to section 1.36.2. Jake Brake® is a registered trademark of Jacobs Vehicle Systems. 12. Remove rocker arm assemblies. Refer to section 1.3.2. 13. Remove the camshaft. Refer to section 1.28.2. 14. If equipped remove camshaft assembly for the compact gear train. Refer to section 1.26.2. NOTE:
Using the camshaft gear pilot tool (J–35906) pull the camshaft gear and thrust plate forward in the gear case until there is approximately a 6.35 mm (1/4 in.) gap between the cylinder head and the diamond-shaped camshaft thrust plate seal when removing the cylinder head. See Figure 1-32. Figure 1-32 Positioning Camshaft Thrust Plate 15. Inspect the rocker arm assemblies and camshaft lobes. Refer to section 1.3.2.2, and refer to section 1.28.3.1. (Rev. 2005) All information subject to change without notice. 1-42 6SE483 0507 Copyright © 2005 DETROIT DIESEL CORPORATION