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 TM 55-1905-220-14-3
Table 3-3. Propulsion Engine - Abnormal Engine Operation
Troubleshooting (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
Detonation (Cont).
b. Inspect the blower oil seals by removing the air inlet housing and watching through the
blower inlet for oil radiating away from the blower rotor shaft oil seals while the engine is
running. If oil is passing through the seals, refer to Direct Support Maintenance.
c.
Check for a defective blower-to-block gasket.
Replace the gasket. Refer to paragraph 3-12.
Step 2.
Check for low coolant temperature.
Refer to MALFUNCTION 1.
Step 3.
Check for faulty injectors.
a. Check injector timing and the position of each injector rack. Refer to paragraphs 3-15
and 3-31. The erratic operation may be caused by an injector check valve leaking, spray tip
holes enlarged or a broken spray tip. Replace faulty injectors. Refer to paragraph 3-15.
3-37
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