Jeep 232, 258 and 4.0L Inline Six and 2.5L Valve Adjustment

AMC/Jeep® Inline Six Hydraulic Lifters and Valve Adjustment      The subject of valve clearance on AMC/Jeep 2.5L fours and 232/258 and 4.0L inline six-cylinder engines is topical at the magazine’s forums—and across the internet!  In this vlog, Moses Ludel talks in depth about checking and setting valve clearance on 1964-2006 AMC-Jeep inline sixes.  Want […]

Moses Ludel’s 4WD Mechanix Magazine – Jeep CJ Inline Six Stroker Rebuild

Moses Ludel’s 4WD Mechanix Magazine – Jeep CJ Inline Six Stroker Rebuild

      Jeep 232/258 Inline Six Upgrade—4.5L to 4.7L Stroker Motor Buildup! (4.7L Long-Block Photo Courtesy of Mopar® Performance)      American Motors’ most significant and enduring contribution to Jeep® was the seven main bearing inline six. While most associate this engine design with ’72-up models, the architecture dates to 1964 and first appeared in 1965 Jeep J-trucks.  […]

Moses Ludel’s 4WD Mechanix Magazine – YJ & TJ Jeep Stroker Six Upgrade

Moses Ludel’s 4WD Mechanix Magazine – YJ & TJ Jeep Stroker Six Upgrade

Jeep Wrangler How-to: Upgrade 4.2L or 4.0L to a Stroker Inline Six (4.7L Long-Block Photo Courtesy of Mopar® Performance) See the exclusive HD video interview with Tony Hewes…Moses Ludel and Tony discuss the right way to build a 4.6L stroker for trail and street legal use. Click here!  American Motors’ most significant and enduring contribution […]

Moses Ludel’s 4WD Mechanix Magazine – Jeep XJ & MJ Engine Upgrades and Swaps

Moses Ludel’s 4WD Mechanix Magazine – Jeep XJ & MJ Engine Upgrades and Swaps

Q&A for Jeep XJ Cherokee and MJ Comanche: Engine Upgrades & Swaps      Enjoy the many detailed, traditional ‘Q&A’ exchanges in these article columns…’Q & A’ has now moved to open, interactive forum discussions. Visit the forums, you’ll want to join—for free!      Have technical questions about your Jeep 4×4,  popular 4WD truck, SUV, ATV, UTV or dirt motorcycle—or welding […]

Moses Ludel’s 4WD Mechanix Magazine – How-to: Tuning the Fuel Injected Jeep Inline Six Stroker Motor

Moses Ludel’s 4WD Mechanix Magazine – How-to: Tuning the Fuel Injected Jeep Inline Six Stroker Motor

Tuning Jeep Inline Six Stroker Motors with EFI or MPI Fuel Injection Converting a Jeep 4.2L/258 inline six from carburetion to multi-point fuel injection (MPI) gains an immediate 50 horsepower. For those building a stroker motor hybrid from 258 and 4.0L parts, the use of MPI or TBI is always a practical choice.  Mopar’s mid-’90s prototype MPI/EFI […]

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 4

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 4

<< Previous    1  2  3  [4]  5    Next >>   Our Installation Approach   258/4.2L AMC/Jeep inline six-cylinder engines date back to 1971, first used in 1971 J-trucks then offered in 1972-up CJ models and a handful of I-H Scout II applications. Two-barrel manifolds on 258 engines can be found as early as some 1976-79 models. Shown here is a Jeep YJ Wrangler […]

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 2

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 2

<< Previous    1  [2]  3  4  5    Next >> History of OEM EFI and Aftermarket Kits for the Jeep 4.2L Inline Six 1987 Jeep YJ Wrangler with 2.5L TBI four-cylinder engine. This engine package first appears in the 1984 Jeep XJ Cherokee.   AMC/Jeep 2.5L four-cylinder engines enjoyed the benefits of OEM throttle body injection (TBI) beginning with the 1984 XJ Cherokee. The […]

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 1

<< Previous    [1]  2  3  4  5    Next >> MSD Atomic EFI: Jeep 4.2L Inline Six ‘How-to’ Retrofit!   At the 2011 SEMA Show, 4WD Mechanix Magazine video cammed new products for Jeep 4WD and Ram truck viewers. We sought out the most innovative and useful products in the market.   Carburetion on Jeep 4.2L/258 inline sixes has been a concern since the 1980s. At […]

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 3

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 3

<< Previous    1  2  [3]  4  5    Next >> Installing the Atomic EFI Master Kit Carter BBD carburetor is a two-barrel design found on emission era AMC/Jeep inline 4.2L sixes. Its complexity reflects emission aims. The carburetor features a microprocessor-controlled fuel metering system, still short of true electronic fuel injection. BBD two-barrel bores and throttle plate are dramatically smaller area than the Atomic […]

Moses Ludel’s 4WD Mechanix Magazine – How-to: Tuning the Carbureted Jeep Inline Six Stroker Motor

Moses Ludel’s 4WD Mechanix Magazine – How-to: Tuning the Carbureted Jeep Inline Six Stroker Motor

How-to: Tuning the Jeep Carbureted Inline Six Stroker Motor! Important: Many 1972-90 Jeep inline six models still require periodic emission control inspection. To avoid failing an emission inspection, make sure that the carburetor and ignition system comply with local, state and federal requirements…. 1) The common stroker build uses a 4.0L block and 4.0L cylinder head (for fit […]

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 5

Moses Ludel’s 4WD Mechanix Magazine – MSD Atomic EFI for Jeep 4.2L Inline Six Part 5

<< Previous    1  2  3  4  [5]    Next >> Observations and Driving Impressions      As set up and intended, the ignition and Atomic EFI function separately. Performance synchronizes as well or better than a factory BBD carburetor and this conventional Motorcraft ignition distributor.      MSD indicates that a smoother idle might be possible when using the Atomic EFI spark timing control functions. Another […]

Moses Ludel’s 4WD Mechanix Magazine – Carburetion Versus EFI Conversion for the 4.2L Jeep Inline Six

Moses Ludel’s 4WD Mechanix Magazine – Carburetion Versus EFI Conversion for the 4.2L Jeep Inline Six

  Jeep 4.2L BBD Carter Carburetor Versus Mopar EFI Conversion Kit      I endorse the use of EFI/MPI systems like the well-conceived, 50-State emission-legal Mopar kit. For the Jeep CJ or YJ Wrangler owner expecting peak horsepower output, maximum fuel efficiency and optimal performance at all altitudes, EFI can be worth the cost! Many 258/4.2L Jeep […]

Moses Ludel’s 4WD Mechanix Magazine – Become a Better Jeep Mechanic

Moses Ludel’s 4WD Mechanix Magazine – Become a Better Jeep Mechanic

      Jeep 4WD How-to: Become a Better Mechanic!   Whether you work on your own Jeep 4×4, own a four-wheel drive specialty shop or plan to travel in rugged and isolated back country, you need mechanical savvy! The Jeep 4WD lifestyle includes roaming open country with a free spirit—the quality of that experience depends upon the reliability and safe function […]

Moses Ludel’s 4WD Mechanix Magazine – Jeep Grand Cherokee 4WD Workshop

Moses Ludel’s 4WD Mechanix Magazine – Jeep Grand Cherokee 4WD Workshop

  Jeep 4WD How-to: Grand Cherokee Workshop   The Grand Wagoneer had no rival when Chrysler’s ZJ Grand Cherokee emerged in 1992! A 5.2L V-8 option in 1993 sweetened the package as the ZJ became the Jeep 4WD luxury model. Want to do your own Jeep 4WD repairs, troubleshooting and upgrades? The workshops offer Jeep […]

Moses Ludel’s 4WD Mechanix Magazine – Stroker Six Upgrade for XJ Cherokee

Moses Ludel’s 4WD Mechanix Magazine – Stroker Six Upgrade for XJ Cherokee

How-to: Jeep 4.0L Inline Six Buildup to 4.5L, 4.6L or 4.7L Stroker (4.7L Long-Block Inline Six—Photo Courtesy of Mopar® Performance) For other details on the stroker six buildup and Mopar’s 4.7L long block, see the article at the “Jeep YJ and TJ Wrangler Workshop” section of the magazine. Click here for direct access to the […]