Part of the Isuzu 4JJ1 engine documentation.
This Isuzu 4JJ1XYSB02 Parts Catalog (publication P-T1160EAC) is the factory parts-identification reference for the 4JJ1 series industrial diesel engine. Across 80 pages it breaks the engine into 35 illustrated figures, from the Engine Gasket Kit and Cylinder Head through the Turbocharger System, Fuel Injection System, and the full electrical group.Each figure pairs an exploded diagram with reference numbers, part numbers, and quantities, so you can identify the exact component you need before ordering. It covers cooling, lubrication, air intake, exhaust, and wiring parts, plus fasteners and gaskets down to individual bolt and stud sizes.Use it to look up correct part numbers for a rebuild, order gasket sets by head-gasket thickness, and avoid buying the wrong turbocharger or injection hardware. It is a downloadable PDF you can search, zoom, and print on demand.
What's Inside This Isuzu 4JJ1XYSB02 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Fuel Injection System, Fuel Filter and Bracket | |
| Cooling System | Water Pump and Corrosion Resistor, Thermostat and Housing, Fan and Fan Belt, Oil Cooler and Oil Filter | |
| Engine | Engine Gasket Kit, Cylinder Head Cover, Cylinder Head, Cylinder Block, Oil Pan and Level Gauge, Camshaft and Valve, Crankshaft, Piston and Flywheel, Timing Gear Case and Flywheel Housing, Engine Mounting, Inlet Manifold, Exhaust Manifold, Water Piping; Engine, Turbocharger System, Oil Pump and Oil Strainer, Oil and Vacuum Piping; Engine, Engine Electrical Control Parts | |
| Electrical System | Starter, Generator, Wiring Harness and Fuse, Fixing Parts; Wiring Harness, Switch and Relay; Instrument Panel | |
| Hydraulics & 3-Point Hitch | Emission Piping |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Turbocharger Mounting Nut Size | M8 | p. 49 |
| Exhaust Pipe Mounting Nut Size | M8 | p. 49 |
| Cylinder Head Gasket Thickness (1-Notch) | 1.05 mm | p. 15 |
| Cylinder Head Gasket Thickness (2-Notch) | 1.10 mm | p. 15 |
| Glow Plug Voltage | 24V | p. 15 |
| Water Drain Plug Thread Size | PT1/4 | p. 19 |
| Oil Gallery Plug Thread Size | PT1/8 | p. 21 |
| Injection Pump Drive Gear Tooth Count | Z=44 | p. 27 |
| Flywheel Ring Gear Tooth Count | Z=122 | p. 29 |
| Thermostat Opening Temperature | 85°C | p. 43 |
Isuzu 4JJ1XYSB02 Common Problems This Manual Covers
Turbocharger loses power and smokes
Owners report power loss, heavy smoke, and a whining turbo, usually from oil contamination or worn seals. Use the exploded Turbocharger System figure to identify the correct assembly, adapters, and mounting hardware for replacement.
Manual Section: Turbocharger System p. 48Injector faults and rough idle
Clogged nozzles or worn injector seals cause rough idling, hard starting, and black smoke on 4JJ1 engines. The Fuel Injection System figure lists the injectors, pipes, and related parts by number for ordering.
Manual Section: Fuel Injection System p. 50Coolant loss with no visible leak
Some owners lose coolant during operation with no external drip, pointing to an internal cooling-system fault. The Water Pump and Corrosion Resistor figure covers the pump, gaskets, and pipe parts to inspect and replace.
Manual Section: Water Pump and Corrosion Resistor p. 40Sensor corrosion causes stalling
Water reaching the engine bay can corrode sensors and connectors, leading to stalling or a no-start. The Engine Electrical Control Parts figure identifies the sensors, relays, and wiring components involved.
Manual Section: Engine Electrical Control Parts p. 64Timing gear noise at high mileage
High-mileage engines can develop timing-related noise as gears and related parts wear. The Timing Gear Case and Flywheel Housing figure shows the case, housing, and fasteners for teardown and reassembly.
Manual Section: Timing Gear Case and Flywheel Housing p. 30Starter fails to crank
A worn or failed starter leaves the engine cranking slowly or not at all. The Starter figure breaks out the assembly and mounting parts so you can order the right unit or components.
Manual Section: Starter p. 68Frequently Asked Questions
Which engine does this parts catalog cover?
It is the Isuzu factory Parts Catalog for the 4JJ1XYSB02 industrial diesel engine, publication number P-T1160EAC. It identifies parts across 80 pages and 35 illustrated figures for this specific engine build.
Does it show turbocharger parts and mounting hardware?
Yes. The Turbocharger System figure lists the turbocharger assembly, adapters, pipes, and mounting studs and nuts with reference and part numbers, so you can order the correct components. p. 48
Can I find cylinder head and gasket parts?
Yes. The Cylinder Head figures cover the head assembly, valves, glow plugs, and head-gasket options by thickness, each with part numbers for ordering rebuild parts. p. 14
How do I get the file after buying?
After checkout you download the PDF directly. Nothing is shipped; the file is yours to keep, view offline, and reprint whenever you work on the engine.
What format is this manual in?
Instant PDF download. The full 80-page searchable Parts Catalog arrives immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Are there any print restrictions on this manual?
None. No DRM or copy protection. Print the entire manual or just the pages you need on any home or office printer.
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