Great Wall Model GW491QE petrol engine Service Manual
Based on the model GW491Q (4Y) carburetor petrol engine, the GW491QE petrol engine produced by our company is of one petrol engine able to electrically inject fuel at multiple points, and is developed from electrical control components made by Delphi company, USA, and Shanghai United Electronic Company. This model shows a predominant improvement in aspects of power and economical efficiency, and is in compliance with GB18352.2-2001 “Limits and measurement methods for exhausts of pollutants from light vehicles (II) ”(equivalent to European Class-II standard), and conforms to stipulations at phase III for GB18352.3-2005 “Limits and measurement methods for exhausts of pollutants from light vehicles (at phase III &IV in China)” (equivalent to European Class-III standard).
To meet the needs from numerous maintenance /technical / management personnel, we prepare this “GW491QE Petrol Engine Service Manual” based on the latest technical materials.
All contents, specifications, and data stated in this manual are the latest information before printing and this service manual will be subject to a supplemental, revision, and completion from time to time.
This manual may be used for the reference by mechanics, drivers, and technical / management personnel as the manual is complete in contents, definite in requirements, and simple in maintenance.
Constrained by the level of the writer, it’s unavoidable to have some defects in this manual, and your comments and suggestions are highly appreciated.
- Engine service &maintenance data
- United Electronic engine management system
- Delphi engine management system
- Engine body
- Cylinder head
- Valve mechanism
- Cooling system
- Lubrication system
- Ignition system
- Starting system
- Charge device