MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
III
Foreword
The GW4D20/GW4D20B turbocharged diesel engine is 4-cylinder in line, 4-stroke, 16-air valve, double
overhead camshaft (DOHC), turbocharged (VGT, WGT), air intake intercooled vehicle engine, and
adopts advanced technologies such as the electric control high-pressure common-rail system, electric
control EGR system, etc; it features good power performance, high economical efficiency, high reliability,
excellent performance at both high and low speeds, quick low-temperature startup, etc., and its emission
conforms to China IV Vehicle Exhaust Emission Standard.
The GW4D20/GW4D20B diesel engine is mainly carried various kinds of LCV, SUV/MPV, compact cars,
high-grade pickups produced by Great Wall Motor Company Limited and similar models from other auto
manufacturers.
AS a kind of power machinery reaching the modern advanced level, the GW4D20/GW4D20B
turbocharged diesel engine has complicated structures, and has strict requirements for the material,
technology and cooperation between parts, and correspondingly requires high levels of application,
maintenance and repair.
Maintenance Manual of GW4D20/GW4D20B Turbocharged Diesel Engines
is a comprehensive manual
for engine maintenance; it consists of the primary technical data, disassembly and assembly, adjustment,
examination and troubleshooting, etc of the GW4D20/GW4D20B turbocharged diesel engine; you
should carefully read and strictly follow the regulations in the manual and master malfunction diagnosis,
elimination and maintenance of the diesel engine so as to ensure the best working condition of the
engine after maintenance and make the engine reach the desirable power performance and economical
index.
As for the vehicle and mechanical chassis parts concerned in maintenance, repair and troubleshooting
of the diesel engine or the parts supplied by auto and machinery manufacturers, please refer to the
maintenance manual of the vehicle or machinery carrying the engine.
For your life and property security, please use and operate the engine in strict accordance with the safety
information described in this manual. The instructions to important issues should be complied strictly,
otherwise it may cause serious injury or machine, vehicle damage and even danger. The warning in this
manual refers to possible personal danger; caution refers to possible damage to the diesel engine and
attention is used for important information without danger.
Please note that the GW4D20/GW4D20B turbocharged diesel engine will be continuously improved
according to market demands and changes, and information on maintenance and repair of improved
parts will be amended or supplemented when the manual is reprinted.
Contents and technical information from this manual are effective as long as the printing is approved. But
the Great Wall Baoding Internal Combustion Engine Manufacturing Company Limited (called our
company for short thereafter) reserves the right to suspend using and change technical information and
the design at any time without previous notice, and the right to change the supply scope, equipment and
technology. Therefore, users cannot have any claim on the basis of the data, illustrations and
explanations described in this manual. Changes in the range of the product structure, equipment and
technology will not be noticed to users, and our company will not assume any relevant responsibility or
obligation.
We hope to get feedbacks concerning advices on the qualities, performances and structures,
experiences in operation, maintenance and repair of GW4D20/GW4D20B turbocharged diesel engines
from users and readers so as to help us improve our products and technologies of operation,
maintenance and repair. Please send your letter to: Sales and Services Department, Great Wall Baoding
Internal Combustion Engine Manufacturing Company Limited, Dingxing County Development Zone,
Hebei Province, China, Postal Code: 072650.
