Crankcase Gases (Blowby) - Excessive
Cause Corrections
----------
Crankcase Breather and/or Vent Tube
Restricted
OK
f
Check breather and/or vent tube
restriction. Refer to Procedure 2-05.
----------
Turbocharger Seals Leaking
OK
f
Check turbocharger seals. Refer to
Procedure 3-02. To rebuild or replace, refer
to Procedure 3-08.
----------
Air Compressor Malfunctioning
OK
f
Isolate air compressor; disconnect air inlet
and outlet lines. If blowby returns to normal
levels, rebuild or replace air compressor.
Refer to Procedure 4-07.
----------
Cylinder Head Intake or Exhaust Valve
Guides Excessively Worn
OK
f
Replace cylinder head(s). Refer to
Procedure 7-18.
----------
Piston, Piston Rings, or Cylinder Liner
Worn or Damaged
Check piston, piston rings and cylinder
liners. Refer to Procedure 7-25 and
7-27.
SectionT-Troubleshooting Troubleshooting Symptoms Charts
N14 Page T-21
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