TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Test or Inspection
18. EXCESSIVE ENGINE NOISES
Defective vibration damper.
a. Inspect vibration damper. If OK, do Step 2.
Excessive valve noise.
a. Inspect push rods and rocker levers for damage and
wear. If OK, do Step 3.
b. Replace push rods and/or rocker levers.
a. Remove and inspect turbocharger impeller and wheel for
If OK, do Step 4.
b. Replace turbocharger.
Gear train noise.
a. Inspect and measure gear backlash. (Refer to
b. Replace damaged gears as required.
a. Disassemble engine and in spect connecting rods and
b. Replace connecting rods and bearings as required.