1999 Jeep Grand Cherokee Engine For Sale: A Comprehensive Buyer's Guide

1999 Jeep Grand Cherokee Engine For Sale: A Comprehensive Buyer’s Guide typestruckssale.com

The 1999 Jeep Grand Cherokee (WJ generation) holds a special place in the hearts of many automotive enthusiasts and off-road adventurers. Known for its robust capability, comfortable ride, and timeless design, it quickly became a favorite. Even decades later, countless WJs are still on the road, serving as reliable daily drivers, family haulers, or weekend trail rigs. However, like any vehicle approaching a quarter-century mark, the original engine may eventually reach the end of its serviceable life due to high mileage, inadequate maintenance, or unforeseen mechanical failures.

When faced with a failing engine in a beloved 1999 Grand Cherokee, owners often find themselves at a crossroads: scrap the vehicle, attempt a costly repair, or opt for a complete engine replacement. For many, replacing the engine is the most logical and cost-effective solution, breathing new life into a capable and otherwise sound vehicle. This comprehensive guide will navigate you through everything you need to know about finding, purchasing, and installing a 1999 Jeep Grand Cherokee engine for sale, ensuring your WJ continues its adventures for years to come.

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1999 Jeep Grand Cherokee Engine For Sale: A Comprehensive Buyer’s Guide

Understanding the 1999 Jeep Grand Cherokee Engine Options

Before embarking on your search, it’s crucial to identify which engine your 1999 Grand Cherokee originally came with. The WJ offered two primary engine choices, each with distinct characteristics:

4.0L PowerTech I6 (Inline-Six): This legendary engine, often dubbed the "bulletproof" 4.0L, is the most common and highly regarded for its simplicity, durability, and low-end torque. It’s a workhorse known for accumulating hundreds of thousands of miles with proper care. While generally reliable, common issues can include oil leaks (especially from the rear main seal), exhaust manifold cracks, and, in some later iterations (though less common for 1999 models), potential cylinder head cracking (specifically the 0331 casting) if overheated.
4.7L PowerTech V8: Offered as an upgrade for more power and refinement, the 4.7L V8 provides a significant boost in horsepower and torque, making it popular in Limited and Overland trims. While powerful, this engine has a reputation for being more sensitive to maintenance, particularly oil changes. Common issues include oil sludge buildup (if maintenance is neglected), dropped valve seats, and lifter problems, especially if overheating occurs.

Knowing your specific engine type (which can be found on your vehicle’s VIN sticker, under the hood, or in the owner’s manual) is the first and most critical step in finding a compatible replacement.

Why Consider a Replacement Engine?

Deciding to replace an engine is a significant undertaking, but it’s often the best path forward for a 1999 Grand Cherokee with a failing heart. Here are common scenarios that lead to an engine replacement:

Catastrophic Failure: This includes a thrown rod, a seized engine, a cracked block or cylinder head beyond repair, or severe internal damage from overheating.
Excessive Oil Consumption/Burning: While some oil consumption is normal for older engines, excessive burning indicates worn piston rings, valve guides, or other internal issues that are costly to repair.
Persistent Knocking/Ticking Noises: These often signify worn bearings, lifters, or other critical internal components nearing failure.
Low Compression: Indicative of worn rings, valves, or head gasket issues that severely impact performance.
Cost-Effectiveness: Often, the cost of rebuilding a severely damaged engine or repairing multiple complex issues can approach or exceed the cost of a good used or remanufactured engine. If the rest of your Grand Cherokee (transmission, transfer case, body, interior) is in good condition, an engine swap is a sensible investment to extend its life.

Types of Replacement Engines Available

When searching for a 1999 Jeep Grand Cherokee engine for sale, you’ll generally encounter three main categories:

Used Engines (Salvage/Junk Yards):
- Pros: Most affordable option. Readily available from various sources.
- Cons: Unknown history, mileage, and internal condition. "As-is" sales are common, offering little to no warranty. You’re essentially buying a gamble.
- Tips: If considering used, always ask for the donor vehicle’s mileage, VIN, and any proof the engine was running prior to removal (e.g., video). Purchase from reputable salvage yards that offer at least a basic start-up warranty. Perform a compression test if possible before installation.
Remanufactured/Rebuilt Engines:
- Pros: Best value for money. These engines have been disassembled, inspected, cleaned, and had all wear parts (pistons, rings, bearings, gaskets, seals, often cylinder heads) replaced with new or reconditioned components. They undergo rigorous testing and typically come with a substantial warranty (1-3 years).
- Cons: More expensive than used engines.
- Tips: Look for engines from reputable remanufacturers (e.g., Jasper Engines, ATK Engines, local certified engine builders). Verify the warranty terms carefully. This is often the recommended option for long-term reliability.
New Crate Engines:
- Pros: Brand new, zero miles, full factory warranty. Ultimate peace of mind.
- Cons: Most expensive option. For a 1999 model, new crate engines directly from Mopar might be extremely rare or discontinued, or only available through specialized performance builders at a premium.
- Tips: If you can find one and your budget allows, it’s the gold standard.

Where to Find a 1999 Jeep Grand Cherokee Engine for Sale

The market for used and remanufactured automotive parts is vast. Here are the most common places to source your replacement engine:

Online Marketplaces: Websites like eBay Motors, Craigslist, and Facebook Marketplace can list engines from individuals or smaller salvage yards. Exercise extreme caution and verify seller credibility.
Specialized Engine Suppliers: Companies like Jasper Engines & Transmissions, ATK Engines, Fraser Engines, and others specialize in remanufactured engines. They offer extensive inventories and solid warranties.
Auto Salvage Yards (Local & Online Networks): Local "U-Pull-It" yards or larger networks like LKQ often have a wide selection of used engines. Many salvage yards are connected through national databases, allowing them to locate parts across the country.
Used Parts Retailers: Websites like Car-Part.com aggregate inventory from thousands of salvage yards, allowing you to search for specific parts and compare prices.
Local Mechanics/Engine Rebuilders: Some independent shops or engine rebuilders might have access to suppliers or even have a rebuilt engine on hand.

Important Considerations Before Buying

Purchasing an engine is a significant investment. Keep these critical factors in mind:

Engine Code & Compatibility: Double-check that the engine you’re buying is the exact match for your vehicle’s year, model, and original engine type. Variations exist even within the same displacement (e.g., different accessory mounts, sensor locations, or flexplate bolt patterns for specific transmissions). Provide your VIN to the seller if possible for verification.
Mileage (for Used Engines): Lower mileage is always preferable for used engines. Ask for documentation like mileage statements or photos of the donor vehicle’s odometer.
Warranty: This is paramount. Understand what the warranty covers (parts only, labor, shipping), its duration, and any conditions (e.g., professional installation required, specific break-in procedures). Remanufactured engines offer the best warranties.
Core Charge: Most engine sellers require a "core charge" – a refundable deposit that ensures you return your old engine. This allows them to rebuild it for future sales. Factor this into your total cost.
What’s Included? Clarify whether you’re buying a "long block" (block, crank, pistons, rods, cylinder head(s), valvetrain), a "short block" (block, crank, pistons, rods only), or a "complete engine" (long block with intake manifold, exhaust manifolds, accessories like alternator, power steering pump, etc.). A long block is the most common and practical option.
Shipping Costs: Engines are heavy! Get a shipping quote upfront. Freight shipping can add hundreds of dollars to the total cost.
Seller Reputation: Check reviews, BBB ratings, and ask for references. A reputable seller is crucial, especially for used or remanufactured units.

The Installation Process: DIY vs. Professional

Once you’ve secured your replacement engine, the next step is installation.

DIY Installation:
- Pros: Saves significantly on labor costs.
- Cons: Requires advanced mechanical skills, specialized tools (engine hoist, engine stand, torque wrenches), and a significant amount of time. Mistakes can be costly.
- Tips: Obtain a factory service manual. Watch numerous video tutorials. Ensure you have proper lifting equipment and a safe working environment. Enlist the help of an experienced friend if possible.
Professional Installation:
- Pros: Expertise, efficiency, often includes a labor warranty from the shop, peace of mind.
- Cons: Can be expensive, with labor costs often matching or exceeding the engine’s price.
- Tips: Get multiple quotes from reputable shops experienced with Jeep Grand Cherokees. Ask about their labor warranty and whether they have experience installing replacement engines.

Post-Installation Tips and Maintenance

After the new engine is installed, a few steps are critical to ensure its longevity:

Break-in Period (for Remanufactured Engines): Follow the remanufacturer’s specific break-in instructions, which usually involve varying RPMs, avoiding heavy loads, and a specific first oil change interval.
Fluid Checks: Ensure all fluids (engine oil, coolant, transmission fluid, power steering fluid) are at the correct levels and are fresh. Consider replacing old radiator hoses, belts, and the thermostat during the swap.
Initial Start-up & Inspection: Monitor for leaks, unusual noises, and proper operation of all systems.
Regular Maintenance: Adhere to the manufacturer’s recommended maintenance schedule, especially regular oil changes with the correct type and viscosity of oil. This is key to maximizing the life of your "new" engine.

Estimated Price Table for 1999 Jeep Grand Cherokee Engines

Engine Type	Condition	Estimated Engine Price Range (USD)	Typical Core Charge (USD)	Typical Warranty	Notes
4.0L I6	Used (Low Miles)	$800 – $1,800	$200 – $400	30-90 Days	Prices vary wildly based on mileage, seller, and what’s included (long block, accessories). Always ask for video of it running or compression test. Expect to replace seals and gaskets.
4.0L I6	Remanufactured	$2,000 – $3,500	$300 – $600	1-3 Years	Best value for reliability and peace of mind. Thoroughly rebuilt with new wear parts. Often includes a comprehensive warranty covering parts and sometimes limited labor.
4.0L I6	New Crate	$4,000+ (if available)	N/A	3-5 Years	Very rare for this model year from OEM; more likely from specialized performance builders. Highest cost but ultimate new-engine reliability.
4.7L V8	Used (Low Miles)	$1,000 – $2,500	$250 – $500	30-90 Days	Similar caveats to used 4.0L engines. Be especially cautious with used 4.7L due to potential sludge issues; inquire about maintenance history or pre-purchase inspection.
4.7L V8	Remanufactured	$2,500 – $4,500	$400 – $700	1-3 Years	Recommended for the 4.7L due to its sensitivity to neglect. A remanufactured unit ensures all critical components are addressed. Often includes new cylinder heads to prevent common issues.
4.7L V8	New Crate	$5,000+ (if available)	N/A	3-5 Years	Similar to the 4.0L new crate, availability is limited and prices are premium.
Installation Labor	Professional	$1,000 – $2,500	N/A	Varies by Shop	This is an estimate for labor only. Prices depend on shop rates, complexity, and whether other components (e.g., transmission service) are performed concurrently. Get multiple quotes.

Note: Prices are estimates and can fluctuate significantly based on location, seller, specific engine condition, included accessories, and market demand. Always get a detailed quote.

Frequently Asked Questions (FAQ)

Q: How do I confirm which engine my 1999 Grand Cherokee has?
A: Check your vehicle’s VIN (Vehicle Identification Number). The 8th digit of the VIN typically indicates the engine type. Alternatively, look for an under-hood emissions sticker or consult your owner’s manual.

Q: What’s the difference between a "short block" and a "long block" engine?
A: A short block includes the engine block, crankshaft, pistons, and connecting rods. A long block includes everything in a short block, plus the cylinder head(s), camshaft(s), and valvetrain (valves, springs, lifters). Most replacement engines sold are long blocks.

Q: Can I upgrade my 4.0L Grand Cherokee to a 4.7L V8?
A: While technically possible, it’s an extremely complex and costly undertaking. It requires not only the V8 engine but also the V8-specific transmission, engine mounts, wiring harness, ECU (engine control unit), cooling system, exhaust, and potentially drive shafts. It is almost never a cost-effective swap for a daily driver.

Q: Why do I have to pay a "core charge"?
A: A core charge is a deposit required by the seller to ensure you return your old, failed engine. This allows them to rebuild it for future sales, promoting recycling and reducing waste. Once your old engine is returned, the core charge is refunded.

Q: How long does an engine replacement typically take?
A: For a professional shop, the labor time can range from 20 to 40 hours, depending on the engine type and any unforeseen complications. Factor in additional time for diagnostics, parts ordering, and post-installation testing.

Q: Are there any common issues I should address during the engine swap?
A: Absolutely! It’s an excellent time to replace items that are difficult to access later: engine mounts, transmission mounts, exhaust manifold bolts, oxygen sensors, spark plugs, ignition coils, thermostat, water pump, radiator hoses, and serpentine belt. Consider flushing the cooling system thoroughly.

Conclusion

Replacing the engine in your 1999 Jeep Grand Cherokee is a significant decision, but it’s often the most logical and rewarding way to extend the life of a vehicle you cherish. By understanding the engine options, knowing where to source reliable replacements, and carefully considering the various types and their associated costs and warranties, you can make an informed decision. Whether you opt for a budget-friendly used engine or a peace-of-mind remanufactured unit, the right approach will ensure your venerable WJ is ready for many more years of loyal service, continuing its legacy of adventure on and off the road.