JEEP 04621916 Cylinder Engine Crankshaft Crank 2.4

( Manufacturer Part Number: 04621916 ), ( Part Type: Cylinder Engine Crankshaft Crank ), ( Oe/oem Part Number: 04621917 )

Review JEEP 2.4 Cylinder Engine Crankshaft Crank Oem fits WRANGLER R6 TJ 2003–2006

The **Jeep 04621916 Crankshaft (R6, 2.4L Engine, TJ Wrangler Models 03-06)** is a precision-engineered, high-performance component designed exclusively for the iconic **2.4L inline-six (I6) gasoline engine** found in the **TJ-generation Jeep Wrangler (2003 through 2006)**. This crankshaft is a critical part of the engine s power delivery system, responsible for converting linear piston motion into rotational torque that drives the vehicle s drivetrain. Crafted from **high-grade forged steel**, this crankshaft is engineered to withstand the rigorous demands of off-road driving, daily commuting, and high-performance applications, ensuring durability, reliability, and optimal power output. The **six-bolt main bearing caps** and **counterweighted design** provide exceptional balance, reducing vibration and enhancing engine longevity, while the **precision-machined journals** ensure smooth operation and minimal wear over extended use. Whether installed in a stock or modified **TJ Wrangler**, this crankshaft delivers the structural integrity and performance required to handle everything from aggressive towing to extreme off-road conditions. Perfect for **restoration projects, engine rebuilds, or performance upgrades**, this part is a direct-fit replacement for the original equipment manufacturer (OEM) crankshaft, maintaining factory specifications while offering enhanced durability for those seeking a more robust powerplant. Built to meet Jeep s exacting standards, it is an essential component for anyone looking to restore or upgrade their **2.4L I6-powered TJ Wrangler** to peak condition.

### **Pros and Cons of Buying a 2004 2006 Jeep Wrangler TJ (Rubicon/Unlimited) with a 2.4L Cylinder Engine (Crankshaft Issue: R6)**

#### **Pros**

1. **Affordability** The 2.4L engine is significantly cheaper to purchase, repair, and maintain compared to the 4.0L or 4.7L/5.7L V8 options. This makes it a more accessible entry point for Jeep enthusiasts on a budget.

2. **Lightweight & Fuel Efficiency** The 2.4L engine is smaller and lighter than the V8 options, resulting in better fuel economy (around 15 18 MPG combined, depending on drivetrain). This is beneficial for daily driving and off-roading trips where fuel costs add up.

3. **Simpler Mechanics** The 2.4L engine has fewer moving parts than a V8, reducing long-term maintenance complexity. This includes fewer belts, fewer cylinders to balance, and less risk of major engine failure (though it s not immune to issues).

4. **Lower Insurance & Registration Costs** Due to its lower power output and smaller size, insurance premiums and annual fees are typically cheaper than for V8-equipped Wranglers.

5. **Good for Beginners or Light Off-Roading** If you re new to Jeep ownership or only plan to use the vehicle for light trails, daily driving, or occasional overlanding, the 2.4L can handle basic demands without excessive strain.

6. **Potential for Modifications** While not as powerful out of the box, the 2.4L can be tuned (e.g., with a turbocharger or supercharger) to improve performance, though this requires more investment than a stock V8.

7. **Availability of Parts** Since the 2.4L was used in the Jeep Liberty and other Chrysler vehicles, parts (especially for common failures like the crankshaft position sensor or timing chain) are widely available.

---

#### **Cons**

1. **Crankshaft Position Sensor (CPS) & Timing Chain Issues** The 2.4L engine is notorious for failing the **crankshaft position sensor** (commonly referred to as the "R6" issue due to its location near the crankshaft). This can cause misfires, rough idling, or even stalling. Replacement is relatively cheap ( $50 $150), but the sensor is prone to failure, especially in high-mileage examples.

- The **timing chain** can also stretch or jump, leading to timing issues and potential engine damage if ignored.

2. **Weak Power Delivery** The 2.4L produces only **148 160 horsepower** (depending on year and drivetrain), which is significantly less than the 4.0L (200 220 HP) or 5.7L Hemi (275 372 HP). This makes it underpowered for serious off-roading, towing, or high-speed driving.

3. **Poor Torque & Acceleration** The lack of torque means sluggish performance, especially when climbing steep hills or pulling heavy loads. The 4-speed automatic (common in these years) can feel sluggish compared to a V8 with a manual or 5-speed auto.

- **Head gasket failures** (less common but possible in high-mileage examples).

- **Rod bearing wear** (due to the engine s design, leading to catastrophic failure if ignored).

- **Oil leaks** from the valve cover gasket or oil filter housing.

5. **Limited Off-Road Capability** The 2.4L struggles with heavy-duty off-roading tasks like rock crawling, deep mud, or serious towing. While a 4x4 or locking differential helps, the engine lacks the power to push through tough terrain consistently.

6. **Resale Value** Jeep Wranglers with V8 engines hold their value far better than 2.4L models. If you plan to sell later, you ll likely get less for a 2.4L unless it s in excellent condition.

7. **No Redline Potential** Unlike V8 Wranglers, the 2.4L doesn t have the same aftermarket tuning potential for serious power gains. Turbocharging is possible but expensive and risky without proper modifications.

---

### **Key Considerations Before Buying**

1. **Mileage Matters** If the vehicle has **under 100,000 miles**, the 2.4L can be a decent daily driver with light off-roading. **Over 150,000 miles** increases the risk of crankshaft sensor failure, timing chain stretch, and other wear issues.

- **Timing chain adjustments** (if the chain has been replaced or adjusted).

- **Crankshaft sensor replacements** (ask if it s been done recently).

- **Rod bearing inspections** (some mechanics recommend checking these at 100K miles).

3. **Test Drive Focus**

- Listen for **ticking noises** (could indicate rod bearing wear or timing chain issues).

- Check for **rough idling or misfires** (sign of a failing CPS).

- Test acceleration if it feels weak or hesitates, the engine may be struggling.

4. **Budget for Repairs**

- **Crankshaft sensor replacement**: $100 $200 (parts labor).

- **Timing chain replacement**: $800 $1,500 (labor-intensive).

- **Rod bearing replacement**: $2,000 $4,000 (major overhaul).

5. **Alternative Options**

- If you want more power, consider a **2007 Wrangler JK with a 3.6L V6 or 5.7L Hemi** (better reliability and performance).

- If you re set on a TJ, a **4.0L or 5.7L V8** (even a used one) will handle off-roading far better.

---

### **Final Conclusion & Recommendation**

- You **prioritize affordability** and don t mind lower power.

- You **plan to use it primarily for daily driving, light trails, or occasional overlanding** (not heavy-duty off-roading).

- You **can afford potential crankshaft sensor and timing chain repairs** (budget at least $500 $1,000 for maintenance over 5 years).

- You **find a well-maintained example with low miles** (under 100K) and a clean service history.

- You re **okay with trading off power for simplicity and cost savings**.

- You **need serious off-roading capability** (rock crawling, heavy towing, deep mud).

- You **want a reliable, high-performance Jeep** for long-term use.

- You **can t afford unexpected engine repairs** (the 2.4L is cheap to buy but can be expensive to keep running).

- You **prefer a more modern Wrangler (JK or JL)** with better reliability and aftermarket support.

- If you re **set on a TJ**, consider a **4.0L or 5.7L V8** (even a used one) for better off-road performance and longevity.

- If you **must have a 2.4L**, buy from a **trusted seller with full service records**, budget for **crankshaft sensor replacements**, and **monitor the timing chain** closely.

- **Test drive thoroughly** and consider a **pre-purchase inspection** by a Jeep specialist to avoid hidden issues.

The 2004 2006 Jeep Wrangler TJ with a 2.4L engine is a **budget-friendly, low-maintenance option for light use**, but it s **not ideal for serious off-roaders or those seeking long-term reliability**. If you re willing to accept its limitations and budget for potential repairs, it can be a fun and affordable Jeep. However, if you want a more capable or modern alternative, a V8-equipped TJ or a newer JK/JL Wrangler is a better choice.

Details:

MAKING Tj GREAT AGAIN.

part #: 04621916 prices

• $156.00-$163.80

specifications cranshafengin:

• for models: R6, Tj, Wrangler
• for makes: Jeep
• for years: 2003-2006
• mpn: 04621916
• part type: Cylinder Engine Crankshaft Crank
• oe/oem part number: 04621917

shipping cranshafengin:

• service: UPS Ground, USPS Ground Advantage
• class: Standard
• transit: 2-6 Days
• cost: $0.00
• type: Fixed
• carrier: UPS, USPS

general cranshafengin:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

payments cranshafengin:

• credit card: Diners-club
• wallet: Google-pay
• other

seller cranshafengin:

• city: Burbank, Ohio
• # reviews: 7655
• rating: 98.8%

offer cranshafengin:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• best offers: True
• started: March 11, 2026
• sold: 0

returns cranshafengin:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

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