Common faults of sinotruk howo WD615 motor

Posted by bruce zhu on December 30th, 2020

The WD615 is the main engine of the HOWO and Steyr mainstream models under the China National Heavy Duty Truck brand. There are many reasons for the failure of the WD615 engine. One reason can cause the diesel engine to show a variety of abnormal phenomena, and failure phenomenon This can be caused by a combination of several reasons. Inspecting and judging faults generally adopt methods such as looking, listening, touching and smelling, from simple to complex, from the outside to the inside. When troubleshooting, you should judge the nature of the fault based on the characteristics of the fault, perform a full analysis of the various phenomena and find out the relationship between them. For faults that cannot be immediately identified, assuming that no major accident will occur, You can observe and analyze the low speed operation of the diesel engine to find out the reason.

faults 1: idling is shock and Asthma

1. EGR valve cannot be fully closed, check and replace assembly.

2, an error code is displayed. (See the error code table for a solution).

faults 2: bad reinforcement

1. EGR valve cannot be fully closed, check and replace assembly.

2, an error code is displayed (check the error code table for a solution)

3, ECU calibration code (re-calibration)

4. The intake pressure sensor is defective (check or replace)

faults 3: insufficient power

1. EGR inlet and exhaust pipes are leaking, check and replace.

2, the error code is displayed (refer to the error code table to find the solution)

3, the intake pressure sensor is defective (check and replace)

faults 4: black smoke from the exhaust

1. EGR valve cannot be completely closed Check and update the assembly.

2, EGR inlet and exhaust pipes are leaking, check and replace.

faults 5: Idling Stop

1. EGR valve cannot be fully closed, check and replace assembly.

2, the error code is displayed (refer to the error code table to find the solution)

faults 6: Steam from exhaust pipe

1. EGR coolant pipe is leaking Check and replace EGR cooler.

faults 7: the oil level in the oil pan increases

1. The increase in the oil level is usually caused by diesel fuel entering the oil pan.

2. Improper installation of the fuel injector return pipe joint (replacement and installation)

As we all know, the motor is very important as the basic component of Sinotruk Howo. The engine should be regularly inspected and maintained. the howo truck parts most important parts is the motor.Take care of your truck, keep your truck in good condition, and create more wealth for you.