1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 12241322390173722
  3. JEEP RL010334

JEEP RL010334 Engine Motor Cylinder Head 4.0

fits model: Wrangler. make: Jeep. year: 2000–2006.

Rl010334 Jeep 00-06 Wrangler 4.0 Engine Motor Cylinder Head

( Manufacturer Part Number: RL010334 ), ( Interchange: 306-1757 ), ( Type: Cylinder Head ), ( Year: 04 ), ( Id: 63159af6-8ec8-4959-acbd-7fd49d774cc3 ), ( Country Of Origin: United States )

Review JEEP 4.0 Engine Motor Cylinder Head fits WRANGLER 2000–2006

The **Jeep RL010334 OEM Cylinder Head for 2000-2006 4.0L Wrangler (YJ/JK Transition Models)** is a precision-engineered, high-performance component designed to deliver reliable power and durability for Jeep s iconic 4.0L inline-six engine. Crafted from high-grade cast iron, this factory-replacement cylinder head is built to exacting specifications, ensuring a seamless fit and optimal performance when installed on the 2000 through 2006 Wrangler models, including both the classic YJ (first-generation) and the early JK (second-generation) transition vehicles. The head features a robust valve train system, including hardened intake and exhaust valves, precision-machined valve seats, and a robust rocker arm assembly that minimizes wear while maximizing airflow for improved combustion efficiency. The integrated spark plug wells and high-quality gaskets provide a secure seal, preventing coolant or oil leaks that could compromise engine integrity. Whether you're restoring a vintage Wrangler to its original glory or upgrading an older model with aftermarket modifications, this OEM cylinder head ensures a perfect match in terms of fit, function, and performance, allowing for smooth operation under both light-duty and rugged off-road conditions. Built to withstand the demands of Jeep s legendary durability, this component is an essential part of maintaining the engine s longevity and power output, making it a must-have for any serious Jeep enthusiast or mechanic seeking genuine, high-quality replacement parts.

### **Pros and Cons of Buying a Used 4.0L Engine Cylinder Head for a Jeep Wrangler (RL010334, 00-06 Model)**

#### **Pros:**

1. **Cost-Effective Replacement** A used cylinder head is significantly cheaper than a new or remanufactured one, making it an attractive option for budget-conscious buyers.

2. **Potential for Customization** If you re experienced with engine work, a used head may allow for modifications like porting, polishing, or upgrading valve springs, which can improve performance.

3. **Availability** Since the 4.0L engine is common in older Jeep Wranglers, used cylinder heads are relatively easy to find, especially in salvage yards or online marketplaces.

4. **Testing & Inspection** You can thoroughly inspect the head for cracks, warping, or internal damage before purchasing, ensuring you re not buying a faulty part.

5. **Potential for Rebuilding** If the head is in decent condition, you may be able to rebuild it yourself or with a mechanic, extending its lifespan further.

#### **Cons:**

1. **Unknown Service History** Without documentation, you won t know if the head has been previously damaged, repaired, or abused, which could lead to future issues.

2. **Risk of Hidden Damage** Cracks, warping, or internal wear (such as valve seat erosion or exhaust port damage) may not be immediately visible, leading to unexpected failures.

3. **Compatibility Issues** If the head isn t properly matched to the rest of the engine (e.g., incorrect valve springs, guides, or seals), it may not function correctly or could cause leaks.

4. **Labor Costs** Even if the head is cheap, installation requires skilled labor, and if mistakes are made, it could end up costing more than a new or remanufactured part.

5. **Warranty & Liability** Used parts typically come with no warranty, meaning you re responsible for any repairs if the head fails prematurely.

6. **Potential for Performance Loss** If the head has been poorly maintained or modified, it may not perform as well as a new or properly rebuilt unit, especially under heavy loads.

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### **Conclusion**

Buying a used 4.0L cylinder head for your Jeep Wrangler can be a cost-effective solution if you re willing to take the risk and have mechanical knowledge. However, the potential for hidden damage, compatibility issues, and lack of warranty make it a higher-risk option compared to purchasing a new or remanufactured head. If you re not experienced with engine work, it may be safer to invest in a verified remanufactured part to avoid costly mistakes down the line.

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### **Recommendation**

- **If you re on a tight budget and confident in your mechanical skills**, a used head from a trusted source (such as a reputable salvage yard with inspection reports) could be a viable option. Inspect it thoroughly for cracks, warping, and internal condition before purchasing.

- **If you prioritize reliability and long-term performance**, consider buying a **remanufactured cylinder head** from a reputable manufacturer (e.g., Jeep, Summit Racing, or a trusted local engine rebuild shop). While more expensive upfront, it eliminates guesswork and ensures proper function.

- **If you re unsure about the head s condition**, have a mechanic inspect it before buying, or opt for a **new OEM or aftermarket head** if available.

Ultimately, weigh the cost savings against the potential risks if the head is critical to your engine s function, erring on the side of caution with a remanufactured part is often the best choice.

Details:

Over 600,000 parts on inventory. Also, any tests that can possibly be done prior to installation should completed at time. Local delivery available to local businesses only. If listing states free shipping, shipping is within the 48 only.

Over 6,000 vehicles in the yard and more arriving daily. Model: JEEP WRANGLER. This item is from a 04 JEEP WRANGLER. Redeliver, limited access fees.

Cylinder Head.

part #: rl010334 prices

  • $116.90-$1110.54

specifications cylinderheapar:

  • for models: Wrangler
  • for makes: Jeep
  • for years: 2000-2006
  • mpn: Rl010334
  • interchange: 306-1757
  • type: Cylinder Head
  • year: 04
  • id: 63159af6-8ec8-4959-acbd-7fd49d774cc3
  • country of origin: United States

offer cylinderheapar:

  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home
  • started: June 3, 2026
  • sold: 0

general cylinderheapar:

  • Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
  • condition: Used

seller cylinderheapar:

  • rating: 99.9%
  • city: Cochranton, Pennsylvania
  • # reviews: 35049

returns cylinderheapar:

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

payments cylinderheapar:

  • credit card: Diners-club
  • other
  • wallet: Paypal

shipping cylinderheapar:

  • class: Standard
  • cost: $145.00
  • transit: 3-7 Days
  • service: Standard
  • type: Fixed
for models: wrangler, for makes: jeep, for years: 2000-2006, interchange: 306-1757, type: cylinder head, year: 04, id: 63159af6-8ec8-4959-acbd-7fd49d774cc3, country of origin: united states,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 12241322390173722,
Jeep RL010334 Is Similar To:
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5 offers $116.90–$1110.54 USD
  • Used. Offer #1 priced at $249.90 + $0.00 shipping estimate = $249.90* total. 2001 Jeep Grand Cherokee (WJ). Jeep Grand Cherokee (WJ) (1999-2004) with 4.0L Engine.FREE SHIPPING
  • New. Offer #2 priced at $116.90 + $0.00 shipping estimate = $116.90* total. - The drive shaft is polished surface and anti-rust, and is connected with a flexible universal joint, which can adjust the angle and distance more flexibly. For Jeep Wrangler 2.5L l4 Automatic and Manual Trans 1997-2002.FREE SHIPPING
  • Used. Offer #3 priced at $1110.54 + $0.00 shipping estimate = $1110.54* total. H25001 1J4GW58S41C619758 2001 GRANDCHER. WRANGLER 03-04 4.0L (VIN S, 8th digit).FREE SHIPPING
  • Used. Offer #4 priced at $175.00 + $145.00 shipping estimate = $320.00* total. Cylinder Head Model: JEEP WRANGLER.+$145.00 shipping
  • Used. Offer #5 priced at $1044.91 + $0.00 shipping estimate = $1044.91* total. 1878072 1 A.FREE SHIPPING

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