Daewoo G20E-3, G25E-3, G30E-3 — спецификация (EN)

SB2215E01 O c t . 2 0 0 1 Service Manual G424 Gasoline/LP Engine G424 LP Engine (Low Emission Version) G20E-3, G25E-3, G30E-3 GC20E-3, GC25E-3, GC30E-3

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Important Safety Information Most accidents involving product operation, maintenance and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills and tools to perform these functions properly. Read and understand all safety precautions and warnings before operating or performing lubrication, maintenance and repair on this product. Basic safety precautions are listed in the “Safety” section of the Service or Technical Manual.

Additional safety precautions are listed in the “Safety” section of the owner/operation/maintenance publication. Specific safety warnings for all these publications are provided in the description of operations where hazards exist. WARNING labels have also been put on the product to provide instructions and to identify specific hazards. If these hazard warnings are not heeded, bodily injury or death could occur to you or other persons. Warnings in this publication and on the product labels are identified by the following symbol. WARNING Improper operation, lubrication, maintenance or repair of this product can be dangerous and could result in injury or death.

Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair information. Operations that may cause product damage are identified by NOTICE labels on the product and in this publication. DAEWOO cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are therefore not all inclusive. If a tool, procedure, work method or operating technique not specifically recommended by DAEWOO is used, you must satisfy yourself that it is safe for you and others.

You should also ensure that the product will not be damaged or made unsafe by the operation, lubrication, maintenance or repair procedures you choose. The information, specifications, and illustrations in this publication are on the basis of information available at the time it was written. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service given to the product. Obtain the complete and most current information before starting any job. DAEWOO dealers have the most current information available. 1

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Index GENERAL INFORMATION ....................................... 4 How to Read This Manual .................................... 4 Precaution Before Service .................................... 6 General ................................................................. 8 Tightening Torque ................................................. 9 Sealant ................................................................ 12 Alternator ............................................................

47 IGNITION SYSTEM .................................................50 Breakerless Ignition System ...............................50 Distributor............................................................51 Removal and Installation .................................... 54 Distributor, disassembly and reassembly ...........56 SPECIFICATIONS ................................................... 13 General Specification .......................................... 13 Service Specification .......................................... 14 GASOLINE FUEL SYSTEM ....................................

58 General Description............................................58 Geasoline Carburetor, Operation........................59 Removal and Installation .................................... 64 Gasoline Carburetor Disassembly and Reassembly............................66 MAINTENANCE ...................................................... 17 Test Fuel System for Leaks ................................ 17 Check Engine Oil Level ...................................... 17 Inspect Engine for Fluid Leaks ........................... 17 Change Engine Oil and Filter .............................

17 Inspect Accessory Drive Belts ............................18 Inspect Electrical System .................................... 18 Inspect Vacuum lines and fitting ......................... 18 Check Coolant Level ........................................... 18 Inspect Coolant Hoses ........................................ 18 Inspect Ignition System.......................................18 Replace Spark Plug ............................................ 18 Replace LP fuel filter element ............................. 19 Test Fuelock (electric) ......................................... 19 Replace Gasoline Fuel filter ...............................

20 Inspect Gasoline Carburetor ............................... 20 Inspect Pressure Regulator/Vaporizer ................ 20 Inspect LP Mixer (Standard LP Truck) ................ 20 Inspect Variable Venturi Air/Fuel Mxer (Low Emission LP Truck)....................................20 Inspect Complete Exhaust System for Leaks,damage .................................................... 20 Engine Control Unit (ECU) and others (Low Emission LP Truck)....................................20 Maintenance Schedule .......................................21 LPG FUEL SYSTEM ...............................................73 General Description ............................................

73 Electric Fuelock Model .................................. 73 Converter ....................................................... 74 Fuel Tank ....................................................... 75 LP Relief Valve .............................................. 75 Carburetor ..................................................... 76 Tests or Adjustments ........................................... 77 Carburetor Adjustment .................................. 77 Fuel System Leak Check ..............................

79 Recommendation for LP Fuel System ..........80 LP Converter - Check, Clean ........................81 Disassembly and Assembly................................82 LPG Carburetor.............................................82 LP Gas Fuelock.............................................84 LP Gas Converter..........................................85 LPG FUEL SYSTEM (LOW EMISSION VERSION) ..87 General Description ............................................ 87 LP Carburetor ................................................ 89 Vacuum switch (MAP) ...................................

90 Vacuum switch ..............................................90 LP Converter .................................................91 Fuel Control Valve.........................................92 Fuelock Valve................................................92 Engine Control Unit (ECU)............................93 Oxygen Sensor..............................................94 Catalytic Muffler.............................................95 Tests or Adjustments...........................................96 LP Carburetor - Check, Clean.......................97 LP Converter-Check,Clean ...........................97 Inspection of Fuelock Valve ..........................97 Inspection of Fuel Control Valve ...................97 Inspection of Vacuum switch.........................97 Inspection of Vacuum switch (MAP)..............97 Inspection of Oxygen sensor.........................98 Disassembly and Assembly................................99 LPG Carburetor.............................................99 LP Gas Converter........................................101 ENGINE SYSTEM ...................................................

22 Engine Overview ................................................. 22 Timing System .................................................... 25 Silent Shaft Mechanism ...................................... 26 Auto Lash Adjuster .............................................. 27 Intake and Exhaust System ................................ 28 Electrical System ................................................ 30 STARTING SYSTEM ............................................... 32 General Description ............................................ 32 Start Relay Test .................................................. 35 Start Motor ..........................................................

36 Operation ....................................................... 36 Removal and Installation ............................... 39 Disassembly and Reassembly ...................... 42 CHARGING SYSTEM .............................................. 47 General Description ............................................ 47 G424 Service Manual Index 2

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DUAL FUEL SYSTEM ........................................... 102 General .................................................. 187 Engine .................................................... 189 Carburetor ..............................................190 Electrical Components ........................... 192 GOVERNING SYSTEM ......................................... 103 General Description .......................................... 103 Governor,Disassembly and Reassembly .......... 104 LUBRICATION SYSTEM ....................................... 106 General Description .......................................... 106 Testing and Adjusting ........................................

107 Engine Oil ............................................... 107 Lubrication System Problem .................. 107 Oil Pressure Check ................................ 109 SPECIAL TOOLS .................................................. 195 COOLING SYSTEM ............................................... 110 General Description .......................................... 110 Testing and Adjusting ........................................ 111 Cooling System Visual Inspection ............... 111 Cooling System Tests .................................. 111 Thermostat ................................................... 113 Cooling system Heat Problem .....................

114 Cooling System Recommendation ..............114 Belt Adjustment............................................116 V-belt Diagnosis ........................................... 116 Serivce Procedure ............................................ 117 Draining and Filling Cooling System ........... 117 Flushing the Cooling System ....................... 118 Radiator Service..........................................118 Removal & Install Water Temperature Sender .. 119 BASE ENGINE SERVICE PROCEDURE .............120 Timing Belt ........................................................ 120 Intake Manifold .................................................

129 Exhaust Manifold and Water Pump .................. 130 Rocker Arms and Camshaft .............................. 133 Cylinder Head and Valves ................................ 139 Front Case and Oil Pan .................................... 145 Piston and Connecting Rod .............................. 154 Crankshaft and Cylinder Block ......................... 162 ADJUSTMENT AND TROUBLESHOOTING ........ 169 Adjustment ........................................................ 169 Valve Clearnce Adjustment ......................... 169 Ignition Timing Adjustment .......................... 169 Idle Speed Adjustment ................................

171 Air Governor Adjustment .............................171 Anti-Hunting Adjustment .............................. 171 Troubleshooting ................................................ 172 Engine Performance....................................172 Engine Starting Problems ...........................172 Charging System Problems ........................ 173 Instrument Problems ................................... 173 Engine Noise ............................................... 174 Oil Pressure Diagnostics ............................. 176 Oil Pressure Problems ................................ 177 Water in Engine ...........................................

178 Engine Overheting ....................................... 179 LP Fuel System (Standard and/or Low Emission Version)....180 Troubleshooting Flow Chart ........................ 187 G424 Service Manual Index 3

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