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Isuzu 4BD1T User Manual

Isuzu 4BD1T
216 pages
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INDUSTRIAL
INDUSTRIAL
DIESEL ENGINE
DIESEL ENGINE
4B-6B SERIES
4B-6B SERIES
4BB1-4BD1-6BB1-6BD1-6BG1
4BB1-4BD1-6BB1-6BD1-6BG1
4BD1T-6BD1T-6BG1T
4BD1T-6BD1T-6BG1T
MODELS
MODELS
WORKSHOP MANUAL
ISUZU MOTORS LIMITED
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Table of Contents

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Isuzu 4BD1T Specifications

General IconGeneral
Bore x Stroke102 mm x 118 mm
Compression Ratio17.5:1
Fuel SystemDirect injection
Cooling SystemWater-cooled
Engine Type4-cylinder turbocharged diesel
Displacement3.9 liters
Weightapprox. 350 kg

Summary

General Information

General Repair Instructions

Essential guidelines for performing service operations on the engine, including safety precautions.

Tightening Torque Specifications

Lists the correct torque values for various nuts and bolts used in engine assembly and disassembly.

Maintenance

Valve Clearance Adjustment

Instructions for checking and adjusting valve clearance to ensure proper engine operation.

Injection Timing

Procedures for checking and adjusting the engine's injection timing for optimal performance.

Compression Pressure Measurement

Guide on how to measure engine compression pressure to diagnose potential issues.

Engine Assembly I (Disassembly)

Rocker Arm and Rocker Arm Shaft Disassembly Steps

Detailed procedure for disassembling the rocker arm and rocker arm shaft assembly.

Cylinder Head Disassembly Steps

Comprehensive guide for safely disassembling the cylinder head assembly.

Piston and Connecting Rod Disassembly Steps

Instructions for disassembling the piston and connecting rod sub-assemblies.

Engine Assembly II (Inspection & Repair)

Cylinder Head

Inspection and repair procedures for the cylinder head, including warpage and height checks.

Valve Guide

Methods for inspecting and measuring valve guide clearance and replacing valve guides.

Cylinder Body and Liner

Detailed inspection and measurement of cylinder bore and liner projection for wear and damage.

Crankshaft

Detailed inspection of crankshaft journals, crankpin outside diameter, and bearing clearances.

Engine Assembly III (Reassembly)

Cylinder Head Reassembly Steps

Detailed procedure for reassembling the cylinder head, including valve and spring installation.

Engine Tuning Operation

Steps for tuning the engine after reassembly, including starting, running, and adjustment procedures.

Fuel System

Injection Pump Calibration Data

Information and specifications required for adjusting and calibrating the fuel injection pump.

Troubleshooting

Starter Inoperative

Troubleshooting steps for when the starter motor is not functioning.

Starter Operates But Engine Does Not Turn Over

Diagnoses issues where the starter engages but the engine does not crank.

Engine Cranks But Does Not Start

Guides for troubleshooting when the engine cranks but fails to ignite and run.

Unstable Low Idling

Identifies causes and solutions for engines with unstable or rough idling performance.

Insufficient Power

Troubleshooting guide for diagnosing and resolving a loss of engine power.

Excessive Fuel Consumption

Lists potential causes and corrective actions for engines consuming too much fuel.

Excessive Oil Consumption

Troubleshooting guide for issues related to high engine oil consumption.

Overheating

Diagnoses and provides remedies for engine overheating problems.

White Exhaust Smoke

Troubleshooting steps for identifying the causes of white smoke from the exhaust.

Dark Exhaust Smoke

Guide to diagnosing and rectifying dark smoke emissions from the engine exhaust.

Oil Pressure Does Not Rise

Troubleshooting steps for low or absent engine oil pressure issues.

Abnormal Engine Noise

Troubleshooting guide for various types of abnormal engine noises and their sources.

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