1998 Jeep Cherokee XJ 4.0L Engine for Sale | HO Era Inline-6 from 1998 XJ Donor

Classic 1998 Jeep Cherokee XJ 4.0L Engine, Year-Specific Donor

Experience the power and performance of the 1998 Jeep Cherokee Classic XJ 4×4 4.0L Engine at a budget-friendly price point. This robust engine is sourced from a 1998 XJ donor vehicle and is designed to deliver exceptional off-road capabilities, making it the perfect choice for adventure seekers, XJ restorers, and outdoor enthusiasts. With its 190 hp and 225 lb-ft of torque, this engine ensures a smooth and powerful ride for trail use, daily driving, and light hauling.

Important Note: This listing is for the engine only, not the complete 1998 Jeep Cherokee vehicle. The page title references the “1998 XJ” because the engine is sourced specifically from a 1998 XJ donor, providing the exact-year match desirable for 1998 XJ repower projects.

1998 Jeep Cherokee XJ 4.0L Engine Specifics

The 1998 Jeep Cherokee Classic XJ 4×4 4.0L Engine is a high-performance Inline-6 cylinder engine. It boasts a displacement of 4.0 liters (242 cu in) and 190 horsepower at 4,600 RPM. The engine features a cast iron block and cast iron cylinder head, with sequential multi-port fuel injection (MPFI). Originally paired with the AW4 4-speed automatic transmission in most 1998 XJ Cherokees, this engine spent its life in 4×4 service.

Why a 1998 Donor Specifically?

The 1998 model year of the Jeep Cherokee XJ falls within the “sweet spot” of HO 4.0 production:

• OBD-II compliant (1996+ engines required for OBD-II diagnostic compatibility)

• Pre-0331 head casting (the 0331 problematic head emerged in 2000-2001; 1998 used the earlier 7120 casting which is significantly more crack-resistant)

• Refined HO architecture (the HO platform had been mature since 1991, all early-issue refinements done by 1998)

• Pre-electronic-throttle (still uses simpler mechanical throttle linkage)

• Strong aftermarket support (1998 is in the heart of the XJ enthusiast era)

Compatible Vehicles

This 1998-sourced 4.0L Engine is specifically suited for the 1998 Jeep Cherokee Classic XJ, but cross-fits other applications with similar specifications:

• Jeep Cherokee XJ: 1996 to 2001 (OBD-II era, direct cross-fit)

• Jeep Wrangler TJ: 1997 to 2006 (different intake manifold orientation, easily swapped)

• Jeep Grand Cherokee ZJ: 1996 to 1998 (OBD-II era ZJ)

• Jeep Grand Cherokee WJ: 1999 to 2004 (with appropriate ECU calibration)

Please verify your year and model before purchasing. Cross-installation between Renix-era (1987-1990) and HO-era (1991+) requires harness and ECU changes; this 1998-sourced engine is HO-era and compatible with HO-era applications only.

Key Features

The 1998 Jeep Cherokee Classic XJ 4×4 4.0L Engine is renowned for its durability and reliability. Key features include:

1. High-Performance: With 190 horsepower and 225 lb-ft of torque, this engine delivers solid performance suitable for off-road driving, daily use, and light towing. The torque-rich character makes it ideal for low-speed crawling and trail work.

2. Fuel Efficiency: Despite its 4.0L displacement, the engine is designed to be reasonably fuel-efficient, making it a cost-effective choice for long-term ownership. 1998 XJ Cherokee with 4.0 typically delivers 16 to 19 mpg city / 20 to 23 mpg highway.

3. Durability: The cast iron block and cast iron cylinder head construction contribute to legendary durability. Properly maintained 4.0 engines routinely log 300,000+ miles. The 1998 vintage uses the earlier 7120 head casting that pre-dates the 0331 casting crack issue.

4. Off-Road Capabilities: Originally installed in a 4×4 1998 XJ Cherokee, this engine has the performance characteristics ideal for off-road adventures. The torque-rich Inline-6 character is exactly what’s needed for rock crawling, trail driving, and overland use.

5. Easy Installation: Designed to fit seamlessly into any 1996-2001 XJ Cherokee, with cross-fit potential to TJ Wrangler and ZJ Grand Cherokee with appropriate intake manifold orientation. This makes it a convenient choice for vehicle owners doing direct repower or modest swap projects.

6. Pre-0331 Head Casting Advantage: The 1998 vintage uses the earlier 7120 cylinder head casting, predating the 0331 casting that became known for cracking issues in 2000-2001 production. This is a meaningful selection criterion for buyers wanting reduced long-term head-crack risk.

Use Cases

This 1998 XJ 4.0 engine is ideal for:

• 1998 XJ Cherokee owners wanting an exact-year repower for their original Cherokee

• HO-era 4.0 builders seeking the 7120 head casting to avoid the 0331 crack issue

• Wrangler TJ / Grand Cherokee ZJ owners doing budget repowers with the cross-fit 1998 engine

• Off-road builders sourcing a known-good HO 4.0 starting point at a budget price

• Restoration projects requiring period-correct 1998-vintage hardware

Comparison: Year-Specific Donor vs Multi-Year Main Listing

Drive 1998 XJ Vintage Energy

Experience the thrill of off-road driving with the 1998 Jeep Cherokee Classic XJ 4×4 4.0L Engine Motor. Its power, performance, and durability make it a valuable addition to your XJ, ensuring an unforgettable driving experience characteristic of Jeep’s legendary “Immortal Six.”

FAQs

Is this a complete 1998 Jeep Cherokee vehicle or just the engine?