Part of the Isuzu 6BG1 engine documentation.
This is the Isuzu Shop Manual (publication IDE-2041-00) for the B-series industrial diesel engines: the 4BD1, 4BB1, 6BB1, 6BD1, 6BG1 and their turbocharged 4BD1T, 6BD1T and 6BG1T variants. Across 221 pages it walks through general specifications, maintenance, full engine disassembly, inspection and repair, and step-by-step reassembly.
Dedicated sections cover the lubricating, cooling and fuel systems, the turbocharger, the air compressor and the engine electricals, plus a troubleshooting section and complete tightening-torque data. You get the numbers that matter, including valve clearance, compression pressure, injection starting pressure and cylinder head and flywheel bolt torque.
Whether you are rebuilding a tired long block, chasing hard starting, or setting injection timing, this PDF gives you the factory procedures and figures to do the job on any of the covered B-series engines.
What's Inside This Isuzu B-Series Diesel Engines Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 8-33 | General Repair Instructions, Main Data and Specifications, Design Features and General Outline, Tightening Torque Specifications, Major Parts Fixing Nuts and Bolts, Identifications |
| Maintenance | 34-53 | Lubricating System, Fuel System, Cooling System, Valve Clearance Adjustment, Injection Timing, Compression Pressure Measurement |
| Engine Assembly I (Disassembly) | 54-69 | External Parts Disassembly Steps, Major Components, Rocker Arm and Rocker Arm Shaft Disassembly Steps, Cylinder Head Disassembly Steps, Piston and Connecting Rod Disassembly Steps |
| Engine Assembly Ii (Inspection & Repair) | 70-101 | Cylinder Head, Valve Guide, Connecting Rod, Crankshaft, Flywheel and Flywheel Housing, Timing Gear Case Cover |
| Engine Assembly Iii (Reassembly) | 102-131 | Piston and Connecting Rod Reassembly Steps, Cylinder Head Reassembly Steps, Rocker Arm and Rocker Arm Shaft Reassembly Steps, Major Component Reassembly Steps I |
| Lubricating System | 132-139 | General Description, Oil Pump, Main Oil Filter, Oil Cooler |
| Cooling System | 140-147 | General Description, Water Pump, Thermostat |
| Fuel System | 148-159 | General Description, Fuel Filter, Injection Nozzle, Injection Pump Calibration Data |
| Turbocharger | 160-163 | General Description, Turbocharger Identification, Rotor Shaft Play Inspection |
| Air Compressor | 164-171 | General Description, Disassembly Steps, Inspection and Repairs, Reassembly Steps |
| Engine Electricals | 172-183 | Starter Motor Identification, Starter Main Data and Specifications, Starter Motor Sectional View, Alternator Identification, Alternator Main Data and Specifications |
| Troubleshooting | 184-207 | Hard Starting, Unstable Low Idling, Insufficient Power, Excessive Fuel Consumption, Excessive Oil Consumption, Overheating |
| Special Tool List | 208-211 | |
| Conversion Table | 212-221 | Length, Area, Volume, Mass, Pressure, Torque |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 6BB1 | ||
| Crankshaft Bearing Cap Bolt Torque | 24.0 ± 1 kg-m (173.5 ± 7.2 lb.ft) | p. 197 |
| All Models | ||
| Thermostat Valve Opening Temperature | 80 — 84 °C (176 — 193 °F) | p. 33 |
| Lubricating Oil Capacity | 13 L (3.44 US gal) | p. 13 |
| Valve Clearance (Cold) | 0.40 mm (0.016 in) | p. 13 |
| Compression Pressure (Standard) | 31.0 kg/cm² (441 psi) | p. 48 |
| Rocker Arm Screw Lock Nut Torque | 2.6 ± 0.5 kg-m (18.8 ± 3.6 lb.ft) | p. 42 |
| Cylinder Head Bolt Torque (Laminated Gasket, 2nd Step) | 9.0 +0.5/-0 kg-m (65.1 +3.6/-0 lb.ft) | p. 121 |
| Turbocharged models | ||
| Injection Starting Pressure (Turbocharged) | 185 kg/cm² (2631 psi) | p. 37 |
| Non-turbocharged models | ||
| Injection Starting Pressure (Non-Turbocharged) | 150 kg/cm² (2133 psi) | p. 37 |
| 4B Series | ||
| Flywheel Bolt Torque (4B Series) | 16 ± 1.5 kg-m (115.7 ± 10.8 lb.ft) | p. 26 |
| 6B Series | ||
| Flywheel Bolt Torque (6B Series) | 22.3 ± 2.2 kg-m (161.2 ± 15.9 lb.ft) | p. 26 |
| 4BD1T | ||
| Turbocharger Model | RHB6A | p. 13 |
