TM 5-6115-584-12NAVFAC P-8-622-12TO-35C2-3-456-1TM-05682C-12Table 4-2. Troubleshooting (Cont)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION3. ENGINE CRANKS NORMALLY BUT FAILS TO START (Cont).Step7. Inspect and test glow plug assemblies (paragraph 4-48).Replace bad glow plugs.4. ENGINE STARTS BUT DOES NOT RUN SMOOTHLY (MISFIRES, KNOCKS, OR MAKES UNUSUALNOISES).Step 1. Check steps 1, 2, 3, 4 and 5 under ENGINE CRANKS NORMALLY BUT FAILS TOSTART above.Perform corrective action as necessary.Step 2. Check valve to rocker arm clearance (paragraph 4-46).Adjust clearance if necessary.5. LOW ENGINE POWER ESPECIALLY UNDER HEAVY LOAD.Step 1. Check steps 1, 2, 3, 4 and 5 under ENGINE CRANKS NORMALLY BUT FAILS TOSTART above.Perform corrective actions as necessary.Step 2. Check air cleaner assembly for obstructions (paragraph 4-41).Remove obstructions.6. ENGINE HAS EXCESSIVE OIL CONSUMPTION.Step 1. Check air cleaner element.Clean or replace element if necessary.Step 2. Check breather pipe (paragraph 4-45).Clean or replace breather pipe.7. LOW OIL PRESSURE.Step 1. Check oil level (paragraph 4-51).Add oil if required,Step 2. Check oil pressure gauge (paragraph 4-33).Replace a bad gauge.8. HIGH OIL PRESSURE.Step 1. Check oil.Add proper grade of oil.Step 2. Check oil pressure gauge (paragraph 4-33).Replace gauge if necessary.4-8
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