Part of the Isuzu 4JJ1 engine documentation.
This is the factory Isuzu parts catalog for the P-TCR50EDC engine, built on the 4JJ1XYBB-01 turbocharged 4-cylinder diesel. Across 80 pages it breaks the engine down system by system with exploded diagrams and Isuzu part numbers, so you can identify and order the exact component instead of guessing.Coverage runs from the engine gasket kit and cylinder head through the cylinder block, camshaft and valve train, turbocharger, fuel injection, cooling, and lubrication, plus the starter, generator, and wiring harness. Each figure lists reference numbers, part numbers, quantities, and interchangeability marks tied to the effective machine serial ranges.Use it to match a worn or failed part to its correct number, confirm gasket grades and thicknesses before an overhaul, and check which components fit your serial range. It is an English-language parts catalog for identification and ordering, not a step-by-step repair manual.
What's Inside This Isuzu P-TCR50EDC, 4JJ1XYBB-01 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 | |
| Other Components | Ventilation System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Head Gasket Thickness | 1.05mm | p. 9 |
| Oil Filler Gasket Inner Diameter | 32mm | p. 13 |
| Oil Filler Gasket Outer Diameter | 40mm | p. 13 |
| Cylinder Head Sealing Cup Outer Diameter | 32mm | p. 15 |
| Glow Plug Voltage | 24V | p. 15 |
| Cylinder Block Water Drain Plug Thread Size | PT1/4 | p. 19 |
| Timing Gear Case Pin Length | 20mm | p. 19 |
| Timing Gear Case Pin Outer Diameter | 10mm | p. 19 |
| Crankshaft Pulley Outer Diameter | 147mm | p. 29 |
| Crankshaft Gear Teeth Count | 44 | p. 29 |
Isuzu P-TCR50EDC, 4JJ1XYBB-01 Common Problems This Manual Covers
Turbocharger loses power and smokes
Turbo failure is common on the 4JJ1 after high mileage or oil contamination, showing up as power loss, excessive smoke, and a whining noise. The Turbocharger System figure lays out every component so you can order the correct replacement parts.
Manual Section: Turbocharger System p. 48Injectors cause rough idle and misfire
Worn or clogged injectors lead to rough idling, poor economy, and hard starting on these engines. The Fuel Injection System section identifies the injectors and related fuel components by part number.
Manual Section: Fuel Injection System p. 50Head gasket failure and overheating
A failed head gasket causes overheating, coolant loss, and compression problems. The Engine Gasket Kit section lists the overhaul gasket sets in three head-gasket thickness grades so you order the right one for your block.
Manual Section: Engine Gasket Kit p. 8Coolant leak from water pump
A worn water pump seal weeps coolant and can trigger overheating on hard-working diesels. The Water Pump and Corrosion Resistor section shows the pump assembly and its parts for correct ordering.
Manual Section: Water Pump and Corrosion Resistor p. 40Hard starting from a worn starter
A tired starter motor cranks slowly and eventually fails to spin the engine over. The Starter section breaks the assembly down to component level so you can replace the failed part rather than the whole unit.
Manual Section: Starter p. 68Clogged fuel filter starves the engine
A blocked fuel filter restricts flow and causes power loss and stalling under load. The Fuel Filter and Bracket section identifies the filter and mounting parts for a clean replacement.
Manual Section: Fuel Filter and Bracket p. 54Frequently Asked Questions
Which engine does this catalog cover?
It covers the Isuzu P-TCR50EDC engine, based on the 4JJ1XYBB-01 turbocharged 4-cylinder diesel. Every figure and part number in the catalog is specific to this engine and its listed effective machine serial ranges.
Is this a repair manual or a parts catalog?
It is a parts catalog. It provides exploded diagrams, reference numbers, and Isuzu part numbers to identify and order components. It does not include step-by-step repair or torque procedures.
What head gasket thicknesses are listed?
The Engine Gasket Kit section lists overhaul gasket sets in three head-gasket thickness grades: 1.05mm, 1.10mm, and 1.15mm, each with its own part number so you can match the correct grade. p. 9
Does it show the turbocharger parts?
Yes. The Turbocharger System section provides an exploded view of the turbo and its related components with reference and part numbers for ordering replacements. p. 48
What format is this manual in?
It's an 80-page searchable PDF, available for immediate download. Opens on any device, including your phone at the workbench. No shipping, no waiting.
Can I print specific sections of this manual?
No restrictions. Print single pages, full chapters, or the entire catalog. The PDF is completely unlocked.
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