TM 10-3930-641-34-1
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. LOUD MECHANICAL NOISE IN ENGINE (CONT)
Step 3. Inspect connecting rod bearings.
Step 4. Inspect pistons for damage.
NOTE
If piston assembly is replaced, then the cylinder liner must also be replaced. (See page 3-239.)
Step 5. Inspect crankshaft for damage.
12. OIL IN COOLING SYSTEM
Step 1. Inspect for defect in oil cooler core.
Repair. (See TM-750-254)
13. FUEL USE IS EXCESSIVE
Use driver's report to decide if increased use of fuel has been gradual or sudden.
A sudden increase
Step 1. Check for fuel leaks.
Replace leaking fuel lines or components. (See TM 10-3930-641-20.)
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