TM 5-3805-280-24-1
Diagnostic Information
Symptom
Problem
Solution
Main and/or connecting rod bearing
Inspect main bearing cap screws
caps loose or worn
and connecting rod cap screws. See
Engine Repair chapter.
Piston scored
Replace piston. See Engine Repair
chapter.
Piston pin bushings worn
Replace pins and bushings. See
Engine Repair chapter.
9010
15
11
Rocker arm shafts worn
Check. See Engine Repair chapter.
Crankshaft end play excessive
Check, repair. See Engine Repair
chapter.
Balancer shafts out of time
Retime. See Engine Repair chapter.
Turbocharger Excessively Noisy
Bearings not lubricated
Insufficient oil pressure. Check for
or Vibrates
restricted turbocharger oil line.
Worn bearings
Replace. See Engine Repair
chapter.
Air leak in engine, intake or exhaust
Inspect and repair. See Engine
manifold
Repair chapter.
Improper clearance between turbine
Remove exhaust elbow and air inlet
wheel and turbine housing
hose. Inspect and repair. See
Engine Repair chapter.
Broken blades on turbine
Remove exhaust elbow and air inlet
hose. Inspect and repair. See
Engine Repair chapter.
Oil Dripping From Turbocharger
Damaged or worn bearings and/or
Inspect compressor and turbine
Adapter
worn seals
wheel for damaged blades. Check
for proper engine service intervals or
dirt entering engine. See Engine
Repair chapter.
Excessive crankcase pressure
Check for plugged oil drain line.
Clean.
Continued on next page
TX,9010,SB112 1929MAY9811/12
3-38
