TM 10-3930-641-34-1
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
15. COOLANT IN LUBE OIL
Step 1. Disassemble and inspect engine oil cooler core.
Repair/replace. (See page 3-152.)
Step 2. If engine oil cooler core is not the problem then begin engine disassembly.
a. Remove cylinder head and check for cracks or defects.
Replace if defective. (See page 3-217.)
NOTE
A new spacer plate gasket and cylinder head gasket must be used whenever heads are disassembled.
b. Inspect cylinder liner seals for defects.
Replace seals. (See page 3-239.)
c. Inspect cylinder blocks for cracks or defects. (See page 3-250.)
Replace block. (See Chapter 3.)
d. If above components were not defective, assume the fault was the cylinder head gasket.
Replace head gasket. (See page 3-217.)
16. BLACK OR GRAY SMOKE FROM EXHAUST
Step 1. Inspect air inlet filter for obstruction.
Replace air filter element. (See TM 10-3930-641-20.)
Step 2. Inspect fuel ratio control.
Adjust/repair. (See page 3-75.)
Step 3. Inspect fuel injection pumps.
Adjust or repair. (See pages 3-32, 3-36.)
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