Jeep 4.0 Engines: How to Rebuild and Modify
Jeep 4.0 Engines: How to Rebuild and Modify
ITEM 306TOT
By Larry Shepard
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 Engines is the essential guide for an at-home mechanic to perform a professional-caliber rebuild or a high-performance build-up.
Sftbd., 144 pgs., 8.5”x11”, 498 photos and charts
This book is obviously just the thing for those who want or need to rebuild or modify a Jeep 4.0-liter 6-cylinder engine. Part of CarTech’s “Workbench How-To Series,” this book represents the go-to guide for such efforts. As CarTech claims, it “is the only book of its kind on the market” that combines detailed, hands-on information with color photographs to guide the at-home mechanic or professional rebuilder. Helping you through all of this is author Larry Shepard, a former Chrysler engineer, who has worked for Mopar Performance and has extensive Jeep engine knowledge. The book’s 10 comprehensive chapters cover such topics as an introduction to the engine, engine removal, disassembly, complete engine inspection, parts selection, building stroker engines, machining and prep, pre-assembly and cleaning, short-block and long-block assembly, and initial startup. An appendix provides torque specifications for fasteners. Finally, Shepard provides a two-page “Source Guide,” offering contact information for 80 businesses. It would have been helpful if it had included information about the products and/or services each provides. Not a Jeep owner, but you intend to rebuild or modify the engine of your non-Jeep? Consider this as a how-to manual for general procedures and helpful tips for any engine rebuild.
Book Review by Robert Gabrick
