TM 5-3805-293-23-2
0032
ENGINE VALVE LASH INSPECT/ADJUST CONTINUED
C AU T I O N
Ensure valve bridge (Figure 15, Item 5) does not tilt while measuring valve lash. Cylinder
6 shown for clarity.
4. Insert feeler gauge (Figure 15, Item 1) between rocker arm (Figure 15, Item 2) and valve bridge (Figure 15,
Item 5) for corresponding inlet valves and exhaust valves (Figure 14). Valve lash should be 0.0138 0.0020 in.
(0.35 0.05 mm).
5. Complete sequence of checks according to Table 1 until all cylinders have been checked.
a. Valve lash OK - install valve mechanism cover. Refer to Valve Mechanism Cover Installation in this work
package.
b. Valve lash less than specified value - Adjust valve lash. Refer to Valve Lash Adjust in this work package.
c.
Valve lash more than specified value - Adjust valve lash. Refer to Valve Lash Adjust in this work package.
Valve Lash Adjust
00032
1. Loosen valve adjustment screw locknut (Figure 15, Item 4) on adjustment screw (Figure 15, Item 3).
2. Measure valve lash between rocker arm (Figure 15, Item 2) and valve bridge (Figure 15, Item 5). Clearance
should be 0.0138 0.0020 in. (0.35 0.05 mm).
3. Hold valve adjustment screw locknut (Figure 15, Item 4) and turn adjustment screw (Figure 15, Item 3) until
correct specification is achieved.
4. Hold valve adjustment screw (Figure 15, Item 3) and tighten valve adjustment screw locknut (Figure 15,
Item 4).
5. Complete sequence of checks according to Table 1 until all cylinders have been adjusted.
6. Install valve mechanism cover, refer to Valve Mechanism Cover Installation in this work package.
Figure 15. Setting Valve Lash.
032
Change 1
