24. SERVICE PROCEDURE Valve Adjustment 1. Select a feeler gauge for the correct valve lash specification Valve Lash Specification mm in Intake 0.36 0.014 Exhaust 0.69 0.027 Insert the feeler gauge between the top ot the crosshead and the rocker lever pad. 2. Two different methodes for establishing valve lash clearance are de- scribed below. Either method can be used: however, the torque wrench method has proven to be the most consitent. It eliminates the need to feel the drag on the feeler gauge. Torque Wrench Method: Use the inch pound torque wrench, Part No. 3376592, (normally used to set preload on top stop in- jectors), and tighten the adjusting screw. Torque Value:
0.7 N•m [6 in-lb] Touch Methode: Tighten the adjusting screw until a slight drag is felt on the feeler gauge. 3. Hold the adjusting screw in this position. The adjusting screw must not turn when the locknut is tightened. Torque Value: Without Torque Wrench Adapter 61 N•m [45 ft-lb] With Torque Wrench Adapter, Part No. ST-699 47 N•m [35 ft-lb] 4. After tightening the locknut to the correct torque value, check to make sure the feeler gauge will slide backward and forward between the crosshead and the rocker lever with only a slight drag. 5. If using the touch method, attempt to insert a feeler gauge that is 0.03 mm [0.001 inch] thicker between the crosshead and the rocker lever pad.
The valve lash is not correct when a thicker feeler gauge will fit. PC450-ENG 3-70