Xj 4.0 Performance Camshaft Swap: Unlock 20+ Hp for $1,200 in Parts and Labor

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The XJ 4.0 engine is well-known among automotive enthusiasts for its reliability and performance potential. One of the most effective ways to boost horsepower is by swapping in a performance camshaft. This article will guide you through the process of unlocking over 20 horsepower for around $1,200 in parts and labor.

Understanding the XJ 4.0 Engine

The XJ 4.0 engine, a staple in Jeep Cherokee models from the late 1980s to the early 2000s, is a robust inline-six engine. Known for its torque and durability, it can be further enhanced with aftermarket components. The camshaft plays a crucial role in engine performance, controlling the timing and duration of the valve openings.

Benefits of a Performance Camshaft

Upgrading to a performance camshaft can significantly improve engine performance. Here are some key benefits:

  • Increased Horsepower: A performance camshaft can unlock an additional 20+ horsepower.
  • Improved Torque: Enhanced torque delivery across the RPM range.
  • Better Throttle Response: Quicker engine response to accelerator input.
  • Enhanced Sound: A more aggressive engine note that enthusiasts love.

Choosing the Right Camshaft

When selecting a performance camshaft for the XJ 4.0, consider the following factors:

  • Lift and Duration: Higher lift and longer duration can improve airflow but may require additional modifications.
  • RPM Range: Choose a camshaft that matches your driving style and intended RPM range.
  • Compatibility: Ensure the camshaft is compatible with your engine’s other components.
  • Comp Cams 68-231-4
  • Hughes Engines 4.0L Performance Camshaft
  • Crane Cams 448-0010

Cost Breakdown for the Camshaft Swap

The total cost for a camshaft swap can be broken down into parts and labor. Here’s an estimate:

  • Performance Camshaft: $500 – $800
  • Gaskets and Seals: $100
  • Labor Costs: $600 – $700

Overall, expect to spend around $1,200 for a complete camshaft swap, depending on the specific parts chosen and labor rates in your area.

Installation Process

Installing a performance camshaft requires mechanical skill and the right tools. Here’s a general overview of the installation process:

  • Preparation: Gather tools and parts, and ensure the engine is cool.
  • Remove Components: Take off the intake manifold, valve cover, and timing cover.
  • Timing Chain/Belt: Remove the timing chain or belt to access the camshaft.
  • Swap Camshaft: Carefully remove the old camshaft and install the new one.
  • Reassemble: Reinstall all removed components and ensure proper torque specifications.

Tuning After Installation

After installing the performance camshaft, tuning is essential to maximize the benefits. Here are a few tuning options:

  • ECU Reflash: Update the engine control unit for optimal performance.
  • Dyno Tuning: Use a dynamometer to fine-tune the engine settings.
  • Air-Fuel Ratio Adjustment: Ensure the engine runs efficiently with the new camshaft.

Conclusion

The XJ 4.0 performance camshaft swap is a rewarding project that can significantly enhance your vehicle’s performance. With the right parts and a bit of mechanical know-how, you can unlock over 20 horsepower for approximately $1,200. Whether you’re an enthusiast or a casual driver, this upgrade is worth considering for your XJ 4.0 engine.