1987 Isuzu UM4BB1 / UM4BD1 / UM4BD1-II / UM4BDIT / UM4BDIT-II / UM4BD1TC Marine Diesel Engine Workshop Manual
1987 Isuzu Marine Diesel Engine UM4B Series Workshop Manual: diagnostics, service, and parts for UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC. Publication IM-WE-4BD1-001.
Isuzu Models Covered & Key Technical Specifications
Models: UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC
Sub-models / Variants: 4-cylinder in-line, water cooled, over-head valve, turbocharged and naturally aspirated variants
Model Year: 1987
Serial Numbers: IM-WE-4BD1-001
Technical Data:
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Engine type: Water cooled, 4-cycle, in-line 4 cylinder
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Displacement: 3595cc (UM4BB1), 3856cc (all other models)
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Max continuous output: 70–110 ps depending on model
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Lubricating system capacity: Max 9.2L, Min 7.2L
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Injection nozzle pressure: 185 kg/cm²
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Valve clearance: 0.4 mm (cold condition)
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Cooling system capacity: Approx 13L
Isuzu Manual Features & Content Preview
1987 Isuzu 4B-Series Marine Diesel Engine Workshop Manual
This official 120-page technical reference (OEM publication IM-WE-4BD1-001) covers the complete 1987 Isuzu 4B-series marine diesel lineup. Built specifically for marine workshops and advanced DIY mechanics, it delivers the exact factory specifications needed for accurate servicing and diagnostics.
- Covers Models: UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, and UM4BD1TC.
- Instant Access: Downloads immediately to your account after checkout as a fully searchable PDF.
- Lifetime Availability: Keep the file forever. Easily print standard Letter or A4 pages for the workbench.
- Visual Diagnostics: Includes 16 exploded-view assembly diagrams and 5 detailed injection pump calibration tables.
Engine Assembly and Lubrication Specs
When overhauling these marine powerplants, precise data is critical. The documentation outlines rigorous clearance standards and wear limits for the rocker arm assembly, crankshaft, camshaft, and piston-connecting rod groups. Technicians will find step-by-step assembly parameters for the cylinder head alongside comprehensive cooling system maintenance requirements. For oil system diagnostics, the manual highlights lubricating circulation routes, oil pump inspection criteria, and relief valve adjustments.
Technical Specifications and Fuel System Calibration
Factory-correct settings make the difference between a reliable engine and a catastrophic failure. Always prioritize safety in the shop by adhering strictly to the multi-stage cylinder head bolt torque sequences and hardware lubrication guidelines detailed inside, as improper torque can lead to severe engine damage.
The guide provides essential tuning data, including specific valve clearance adjustments and injection timing settings. Mechanics will find comprehensive fuel system metrics for the Diesel Kiki injection pump, detailing calibration speeds and rod positions across the entire 4B range. Essential fluid parameters are also mapped out, establishing the cooling system capacity at 13 liters and the crankcase oil limit at 9.2 liters.
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