ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
Rotate engine flywheel clockwise when viewed from the front of the engine.
(e) Apply light pressure to tip of timing pin and rotate flywheel rotation tool counterclockwise
until timing pin slides into hole in flywheel and prevents flywheel from turning.
Check rocker arms on Number 4 cylinder, refer to Figure 4-47. If both rocker arms are
loose, the engine is set with No. 4 Piston at TDC. If both rocker arms are not loose, engine
is one full revolution (360º) away from TDC, rotate engine slightly and repeat steps 4 and
b. Test Valve Clearance.
(1) Check and Adjust Valve Clearance.
Valve clearance MUST BE checked and adjusted with engine COLD.
(a) Remove rocker arm cover, refer to paragraph 4.7.1.
(b) Visually inspect contact surfaces of valve tips and rocker arm wear pads. Check all parts
for excessive wear. Replace all parts that show visible damage.
FIGURE 4-47. ROCKER ARM LOCATION