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 TM 55-1905-223-24-5
Table 4-1. Troubleshooting - CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 3.
Check for main bearing noise.
a.
Inspect main bearing caps and capscrews (para. 4-19).
b.
Inspect main bearings (para. 4-19).
c.
Inspect crankshaft journals (para. 4-19).
STEP 4.
Check for piston noise.
a.
Piston rings worn or broken. Inspect piston rings (para. 4-17).
b.
Piston cracked or broken. Inspect piston (para. 4-17).
c.
Carbon deposits on the top of piston. Clean piston (para. 4-17).
d.
Piston pins or bushings loose, worn or not installed correctly.
Inspect the piston pins and bushings (para. 4-17).
e.
Cylinder liners worn or out-of-round. Repair cylinder liners
7. Lubricating oil in the coolant.
STEP 1.
Check for cracked or porous cylinder block.
Replace cylinder block (para. 4-20).
8. Loss of engine coolant (internal leakage).
STEP 1.
Check injector sleeves.
Repair cylinder block (para. 4-20).
STEP 2.
Check cylinder block for cracks or porous condition.
Replace cylinder block (para. 4-20).
STEP 3.
Check cylinder liners.
Repair cylinder block (para. 4-20).
9. Excessive lubricating oil consumption.
STEP 1.
Check for internal leaks.
Test for excessive blowby, refer to Table 2-2, Item 10, step 8.
STEP 2.
Check for worn, broken, or not properly seated piston rings.
Repair piston ring assembly (para. 4-17).
STEP 3.
Check for worn piston ring grooves.
Repair piston ring assembly (para. 4-17).
STEP 4.
Check for scored or damaged cylinder liners.
Replace cylinder block (para. 4-20).
STEP 5.
Check intake valve guide for leakage.
Repair cylinder head (para. 4-12).
4-4
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