MBE 900 OPERATOR'S GUIDE Checking Valve Lash Check valve lash as follows: 1. For each valve, measure the valve lash with a feeler gauge between the rocker arm and valve stem (exhaust valve) or valve bridge (intake valve). It should be possible to pull the feeler gauge through with no more than light resistance. 2. If the value measured is within the range listed in Table 28 in the "Check For" column, check the next valve. Figure 37 Intake Valves If the value measured is outside the range listed in Table 28 in the "Check For" column, adjust the valve lash. Adjusting Valve Lash Adjust valve lash as follows: 1. If adjustment is needed, loosen the locknut.
See Figure 37 for intake valves and Figure 38 for exhaust valves. Use the exact settings listed in Table 28 in the "Adjust To" column. Figure 38 Exhaust Valves Table 28 Valve Lash Checking and Adjustment All information subject to change without notice. (Rev. 04/08) 83 DDC-SVC-MAN-0055 04/08 Copyright © 2008 DETROIT DIESEL CORPORATION Valve Type Check For: Adjust to: Intake 0.30 to 0.60 mm (0.012 to 0.024 in.) 0.40 mm (0.016 in.) Exhaust 0.50 to 0.80 mm (0.020 to 0.032 in.) 0.60 mm(0.024 in.)