Operation & Maintenance Manual for WP7 Euro
Ⅵ
Vehicle Diesel Engine
14
3.6 White or blue smoke emission
Causes
Troubleshooting
1. Poor quality fuel that contains too
much water
Change the fuel
2. Coolant water has low temperature
Check working temperature of the
thermostat or replace it when necessary
3. Wrong valve timing or injection
timing
Check and adjust
4. Injector nozzle poor atomization
Check and repair
5. Low
compression
pressure,
incomplete combustion or cylinder
scuffing
Check the piston ring, cylinder liner and
cylinder head gasket and repair them
6. Poor running-in between piston rings
and the cylinder liner
Running-in for more time
7. Openings of piston rings are not
staggered
Adjust or re-assemble
8. Piston oil ring failure
Replace
9. Excessive clearance between the
piston and cylinder liner
Repair or replace
10. Sealing ring of turbocharger is worn Repair or replace
11. Turbocharger thrust bearing is worn Check and replace
12. Turbocharger oil outlet pipe is
blocked
Wash or repair
