Quantcast COOLANT TEMPERATURE TOO HIGH (ENGINE OVERHEATING).

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TM 9-2815-226-34-1
Table 2-1. TROUBLESHOOTING PROCEDURES (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
22.
COOLANT TEMPERATURE TOO HIGH (ENGINE OVERHEATING).
Step 1.
Check for excessive oil in crankcase (crankshaft oil dipping creating increased friction and parasitic drag
on engine).
Drain oil to proper level (LO 9-2320-281-12).
Step 2.
Check exterior of engine for excessive dirt and grease hindering normal heat dissipation.
Steam clean engine.
Step 3.
Check for leaking water pump, hoses, oil cooler, aftercooler, and all external lines.
Repair or replace defective parts (TM 9-2320-281-20).
Step 4.
Check for blown or leaking engine and air compressor head gaskets.
a. Replace engine head gasket(s) (para 3-6 and 3-94).
b. Replace air compressor head gasket (TM 9-2320-281-34).
Step 5.
Check for defective thermostat.
Replace defective thermostat (TM 9-2320-281-20).
Step 6.
Check for defective water pump.
Replace defective pump (TM 9-2320-281-20).
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