Jeep 4.0 Engines: How To Rebuild And Modify by Larry ShepardJeep 4.0 Engines: How To Rebuild And Modify by Larry Shepard

Jeep 4.0 Engines: How To Rebuild And Modify

byLarry Shepard

Paperback | September 19, 2014

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The venerable Jeep 4.0L in-line 6 engine has powered millions of Jeeps, including CJs, Wranglers, Cherokees, and Wagoneers. The 4.0 delivers adequate horsepower from the factory, but many off-road drivers want more horsepower and torque to conquer challenging terrain, which means these engines are often built and modified. The Jeep 4.0, or 242-ci, is affordable, abundant, exceptionally durable, and many consider it one of the best 4x4 off-road engines.

In this Workbench title, veteran author and Chrysler/Jeep engine expert Larry Shepard covers the rebuild of an entire engine in exceptional detail. He also delves into popular high-performance modifications and build-ups. Step-by-step photos and captions cover each crucial step of the engine disassembly. He shows the inspection of all critical parts, including block, heads, rotating assembly, intake, and exhaust. Critical machining processes are covered, including decking the block, line boring, and overboring the block. The book provides exceptional detail during the step-by-step assembly so your engine is strong and reliable. Installing a larger-displacement rotating assembly (or stroker package) is one of the most cost-effective ways to increase performance, and the author covers a stroker package installation in detail.

With millions of Jeep 4.0 engines in the marketplace (which are subjected to extreme use), many of these engines require a rebuild. In addition, many owners want to extract more torque and horsepower from their 4.0 engines so these engine are also modified. Until now, there has not been a complete and authoritative guide that covers the engine rebuild and build-up process from beginning to end.Jeep 4.0 Enginesis the essential guide for an at-home mechanic to perform a professional-caliber rebuild or a high-performance build-up.

, won the Best of 2014 International Automotive Media Award. As a seasoned author and Mopar expert, he has written several high-performance Chrysler rebuild books.
Title:Jeep 4.0 Engines: How To Rebuild And ModifyFormat:PaperbackDimensions:144 pages, 11 × 8.5 × 0.38 inPublished:September 19, 2014Publisher:CartechLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:1613251386

ISBN - 13:9781613251386

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Table of Contents



What is a Workbench® Book? 

Chapter 1:

The Jeep 4.0 Engine
Parts Identification 
Tools and Procedures 
Engine Compartment

Chapter 2:

Engine Removal 
Engine Lift and Engine Stand 
Basic Tools 
Special Tools 
Basic Prep 
Engine Removal 

Chapter 3:

External Component Removal 
Verify Engine Timing 
Rotating Assembly Removal
Freeze Plug Removal 
Cylinder Head Disassembly 

Chapter 4:

Machine Shop 
Inspection Process
Engine Block 
Crank and Bearings 
Rods and Bearings 
Pistons and Pins 
Cam and Tappets 
Cylinder Head and Gasket 
Intake Manifold and Gasket 
Exhaust Manifold 

Chapter 5:

Parts Selection 
Dyno Simulation 
Component Replacement 
Rotating Assembly 
Vibration Dampener 
Flexplate and Flywheel 
Cylinder Head 
Camshaft and Valvetrain 
Intake Manifold and Throttle Body 
Oiling System 
Cooling System 
Ignition System 
Fuel System 
Exhaust System 

Chapter 6:

Building Stroker Engines 
Crank Offset 
Compression Ratio 
Dyno Numbers 
Crate Engines 

Chapter 7:

Machining and Prep 
Cylinder Block 
Dowel Pins 
Cam Bearing 
Rods and Pistons 
Cylinder Head 
Intake Manifold 

Chapter 8:

Preassembly and Final Cleaning 
Tools and Equipment 
Hydraulic Cam 
Cylinder Head Assembly 
Head CC&ing 
Preassembly Sequence 
Cylinder Head 
Valveguide Clearance 
Oiling System 
Intake Manifold  
Final Cleaning Process 

Chapter 9:

Short-Block Assembly 
Engine Final Assembly 
Piston and Rod Assembly 
Piston and Rod Installation 
Camshaft Installation 

Chapter 10:

Long-Block Assembly and Initial Start-Up 
Cylinder Head Assembly 
Mounting the Cylinder Head Assembly to the Short-Block 
Valvetrain Installation 
Accessory Installation 
Installing Engine in Vehicle 
Component Installation 
In-Car Hook-Up and Pre-Startup 
After the First Startup 
Engine Break-In 

Source Guide