Toyota 2H, 12H-T Engine Repair Manual

This repair manual covers general service repairs for the 2H and 12H-T engines mounted on the Toyota Land Cruiser (Heavy-Duty). Applicable models: HJ60, 61, 75 series.

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Document Details

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Document Number / Seller:
28150 / Thomas Peterson
File Size:
149.84 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Diesel Engine
Last updated / verified
Jun 24, 2025

Models Covered & Key Technical Specifications

Toyota 2H, 12H-T Engine (Original Manual) - 1985

Documentary Sourcebook for Toyota Engine Series.

  • Engine Specifications Data: 100 mm bore diameter establishes the primary cylinder dimension. S1
  • Fuel System Data: For optimal performance, 20 mm hose diameter defines the fuel line capacity. S2
  • Compression Specs Data: 28.0 kg/cm^2 -- signifies the minimum acceptable cylinder pressure. S3
  • Torque Settings Data: The banjo bolt requires 35 N-m for proper tightening. S4
  • Oil Capacity Data: 4.1 L establishes the total engine oil volume Requirements. S5
  • Valve Clearance Data: 0.20 mm intake and 0.36 mm exhaust for correct valve operation Benchmarks. S1

Professional Workshop Service Manual & Technical Specifications

Verified Workshop Reference Manual: Diesel Engine Original Manual for Toyota engine: 2H, 12H-T engines Service-Portfolio

Validation-Data: Toyota Engine Series // Service-Level: Diesel Engine / Engine Logic // Validation-Data: 1985 Specification Data.

Performance-Element Technical-Path Validation-Data
Engine Specifications General Components Found on page EM-47
Fuel Delivery Rate Injection Pump Output Specified per model
Compression Readings Cylinder Block Testing Data on pages EM-35/36
Turbocharger Specs 12H-T System See page EM-17 for details
Cooling System Details Water Outlet Assembly Covered in pages EM-51/52

Technical units are distributed across multiple sections, detailing engine mechanics, fuel system, and associated components. The manual provides a structured approach to understanding and maintaining these diesel engines.

Introduction

  • Electrical system documentation covers diagnostic procedures for engine issues.

    Engine Mechanical

  • Suspension service documentation covers component assembly and disassembly.

    Fuel System

  • Disassembly instructions are documented for fuel injection nozzles and pumps.

    Cooling System

  • Wear limits are specified for water pump and thermostat housings.

    Lubrication System

  • System operation descriptions cover oil pump and filter servicing.

    Starting System

  • Procedures are documented for the starter motor and battery system.

This manual documents torque specifications for critical engine components to ensure proper pressure slip prevention.

FAQ

Check the **standard** component identification for the fuel feed pump. keyboard_arrow_down

2 m (78.7 in.) is the specified pipe length for the fuel feed pump.

What does the **necessary** adjustment procedures entail for the automatic timer? keyboard_arrow_down

37.8 mm (1.488 in.) is the free length for the 2H inner spring.

Reference the **recommended** pressure specifications for the injection nozzles. keyboard_arrow_down

105 – 125 kg/cm² is the reusable nozzle opening pressure for the 2H engine.

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Rated 4 out of 5 stars
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This manual is incredibly detailed and easy to follow. The download process was smooth, and I received the link almost instantly. Highly recommend!