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ARMY TM 9-2815-256-24 AIR FORCE TO 38G1-96-2 MARINE CORPS TM 2815-24/5 b. Remove plastic plugs in engine timing holes. c. Using center bolt on harmonic balancer, rotate crankshaft clockwise until No. 1 piston is at TDC on compression stroke. NOTE If rocker arms for No.  1 cylinder are loose, engine is at No.  1 TDC compression. d. Valve clearance (rocker arm-to valve tip) is: (1) Intake Valve ...........................0.014 in.  (0.35 mm) (2) Exhaust Valve .........................0.018 in.  (0.45 mm) e. If valve clearance is not within specification, refer to following steps and adjust valve clearance. NOTE Excessive valve clearance indicates wear on camshaft and/or cam followers. NOTE Firing order is 1-5-3-6-2-4.  Intake and exhaust valve locations are designated I and E in FIGURE 3- 115. f. Set No.  1 piston at TDC compression stroke and install timing pin (JDE-81-4) in flywheel. FIGURE 3-115.  Adjusting Valve Clearance g. Adjust valve clearance on No.  1, 3, and 5 exhaust valves and No.  1, 2, and 4 intake valves, refer to FIGURE 3- 116. h. Remove timing pin. i. Turn crankshaft 360 degrees so that No.  6 piston is at TDC compression stroke and reinsert timing pin. j. Adjust valve clearance on No.  2, 4, and 6 exhaust valves and No.  3, 5, and 6 intake valves. k. Remove timing pin. *U.S.  GOVERNMENT PRINTING OFFICE:  1996 - 755-025/40023 Change 2 3-140


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