SERIES 60 SERVICE MANUAL 1.2.3.4 Verification of Countersink Geometry To verify countersink geometry, perform the following steps. 1. Install new injector tubes. Refer to section 2.4.6. 2. Place valves into proper location and check to be sure that valve heads are recessed from the firedeck surface by at least 1.4-1.8 mm (0.055 -0.071 in.). Listed in Table 1-32. See Figure 1-41. If not, reduced-thickness valve seat inserts must be installed. Refer to section 1.4.6. Figure 1-41 Valve Head-to-Cylinder Head Measurement All information subject to change without notice. (Rev. 2005) 6SE483 0507 Copyright © 2005 DETROIT DIESEL CORPORATION 1-51