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Page Title: Table 2-1. Troubleshooting (Cont).
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TM 5-2420-222-34 Table 2-1.  Troubleshooting (Con’t). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 2. Check engine timing (see paragraph 3-16). Set engine timing (see paragraph 3-16). If engine timing Is okay, remove cylinder head (see paragraph 3-6) and check cylinder head gasket. If cylinder head gasket is okay, replace valves (see paragraph 3-12). Step 3. Remove timing gear cover (see paragraph 3-18).  Check fuel metering pump drive gear-to-idler gear backlash (see paragraph 3-19). Adjust fuel metering pump drive gear-to-idler gear backlash (see paragraph 3-19). Step 4. Remove cylinder head (see paragraph 3-6).  Check for a scored cylinder sleeve.  Crank engine until piston in cylinder being checked is at bottom of cylinder.  Visually check cylinder sleeve.  Repeat for all four cylinders. Replace cylinder sleeves (see paragraph 3-5). Step 5. Remove timing gear cover (see paragraph 3-18).  Check crankshaft end play (see paragraph 3-8). Adjust crankshaft end play (see paragraph 3-8). Step 6. Check end clearance of idler gear (see paragraph 3-15). Adjust idler gear end play (see paragraph 3-15). 9. ENGINE USES TOO MUCH OIL. Step 1. Perform engine assembly compression test (see paragraph 3-1). Put a small amount of oil In cylinder and repeat engine compression test (see paragraph 3-1). If compression test readings are now normal, replace piston rings (see paragraph 3-11). Step 2. Remove cylinder head (see paragraph 3-6).  Check cylinder head gasket for damage. If cylinder head gasket Is damaged, replace cylinder head gasket and Install cylinder head (see paragraph 3-6). If cylinder head gasket is okay, check cylinder sleeves for out-of-round condition (see paragraph 3-5) or piston rings for incorrect installation (see paragraph 3-11). Step 3. Check rocker arm compartment for signs of too much oil. If rocker arms compartment has signs of too much oil, problem is clogged oil return holes. Use a thin wire probe and try to clear obstruction from oil return hole. Step 4. Remove and disassemble rocker arm assemblies (see paragraph 3-13).  Check inside diameter of rocker arms. Replace rocker arm if defective (see paragraph 3-13). Step 5. Measure outside diameter of rocker arm shafts (see paragraph 3-13). Replace rocker arm shaft if defective (see paragraph 3-13). 2-6

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