Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 3.6 White or blue smoke emission 14 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