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TM 5-4210-220-34
Table 2-1. DIRECT SUPPORT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Check exhaust manifolds for oil.
a. Check and replace, If necessary, valve stems and guides (para. 2-19.7).
b. Refer to General Support.
Step 4.
Pressure test the engine cooling system.
Replace oil cooler if leaking, (TM 5-4210-220-12).
Step 5.
Check for low cylinder compression
a. Regrind or replace exhaust valves (para. 2-19.7).
b. Replace leaking cylinder head gasket (para. 2-19.8).
c. Refer to General Support.
3j
ENGINE OVERHEATING
Step 1.
Check fan and shutter operation.
Repair air lines, multistat, or shutter or fan actuator as required, (para. 2-16).
Step 2.
Check thermostats.
Replace as required (TM 5-4210-220-12).
Step 3.
Check radiator.
Replace core as required (2-16).
Step 4.
Check for exhaust gases in radiator.
Replace cylinder head(s) (para. 2-19.8).
Step 5.
Check water pump circulation and seals.
Repair as required (para. 2-19.9).
3k ENGINE WILL NOT REACH WORKING TEMPERATURE
Step 1.
Check operation of shutter.
Replace components as required (para. 2-16).
Step 2.
Check thermostats.
Replace as required (TM 5-4210-220-12).
2-7
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