Cummins B3.9 & B5.9 Series Troubleshooting and Repair Manual
This manual provides instructions for troubleshooting and repairing the Cummins B3.9 and B5.9 Series Engines, covering engine identification, systems, and procedures. Bulletin No. 3666087-01.
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Cummins Models Covered & Key Technical Specifications
Models: B3.9, 4B3.9, 4BT3.9, 4BTA3.9, B5.9, 6B5.9, 6BT5.9, 6BTA5.9
Sub-models / Variants: Naturally Aspirated, Turbocharged, Aftercooled, Automotive, Nonautomotive
Build Years: 1999
Technical Data:
- Engine Displacement: 3.9 liters (B3.9 series), 5.9 liters (B5.9 series)
- Compression Ratio: 16.5:1 to 18.5:1 depending on model configuration
- Valve Clearance Intake: 0.25 mm [0.010 in]
- Valve Clearance Exhaust: 0.51 mm [0.020 in]
- Oil Pressure at Idle (min): 69 kPa [10 psi]
- Oil Pressure at Rated (min): 207 kPa [30 psi]
- Cooling System Capacity (B3.9 Automotive): 7 liters [7.4 qt]
- Cooling System Capacity (B5.9 Automotive): 10.5 liters [11.1 qt]
- Lubricating Oil Capacity (B5.9 Standard Pan): 14.2 liters [15 qt]
- Fuel Transfer Pump Minimum Pressure: 175 kPa [25 psi] at rated rpm
Cummins Manual Features & Content Preview
Inside the 1999 Cummins B3.9 & B5.9 Troubleshooting and Repair Manual
- This 928-page Cummins B3.9 & B5.9 Service Manual covers troubleshooting and repair for 4-cylinder and 6-cylinder diesel engines, including 4BT, 4BTA, 6BT, and 6BTA configurations.
- Official Cummins publication bulletin No. 3666087-01, printed October 1999.
- Contains 12 detailed engine system diagrams, 27 specific troubleshooting symptom charts, and comprehensive specifications for fuel, lubrication, and cooling systems.
- File link appears in your order confirmation straight away.
- Indexed PDF search covers every chapter and appendix.
- This 1999 edition documents the complete B3.9 & B5.9 architecture used in early automotive and non-automotive applications, including critical torque and pressure reference data.
Engine System Coverage
The 1999 Cummins B3.9 & B5.9 troubleshooting and repair manual provides extensive data for engine diagnostics and maintenance. The content spans critical groups including the cylinder block, cylinder head, rocker levers, fuel systems, and exhaust assemblies. Users find detailed logic trees for identifying symptoms related to air compressor performance, cooling system state, and combustion characteristics. Specialized sections define procedures for intake air management, electrical system integration, and turbocharger inspection criteria.
Specification Highlights
Technical data within the 1999 Cummins B3.9 & B5.9 publication includes precise reference values for shop-level assessment. The document contains cooling system capacities ranging from 7 liters for the B3.9 to 14.5 liters for the 6BTA5.9, while lubrication system data lists minimum oil pressure limits. Fuel system specs provide pressure drop constraints for filtering components to aid in performance analysis. Cylinder head bolt torque values are documented in a multi-stage sequence, with specific clearance and tolerance charts provided for engine reassembly. Valve clearance for the intake is listed at 0.25 mm in the cylinder head specification table. The lubricating oil pressure at rated speed for the Cummins B5.9 is specified at 207 kPa. Cooling system capacity for the B5.9 automotive application is documented at 10.5 liters. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. An official 928-page Cummins OEM service manual covering the 1999 B3.9 and B5.9 series, documenting engine, fuel, lubrication, and cooling system specifications for the B-series engine line.
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