1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11433237734616632
  3. JEEP R6637022

JEEP R6637022 Passenger Right Cylinder Head 3.7L

fits model: Liberty. make: Jeep. year: 2002–2004.

R6637022 Jeep 2002-2004 Liberty Passenger Right Cylinder Head Assembly Oem 3.7l

( Manufacturer Part Number: R6637022 ), ( Part Type: Cylinder Head ), ( Id: 3be7593a-f727-44f8-8a04-b652999823d8 ), ( Interchange: 306-1844 )

Review JEEP Passenger Right Cylinder Head Assembly Oem 3.7l fits LIBERTY 2002–2004

The **Jeep R6637022 Cylinder Head (Passenger Side) for the 2002-2004 3.7L Chrysler Hemi V8** is a precision-engineered component designed to deliver exceptional performance and reliability in one of the most iconic and powerful engines of its era. This high-performance cylinder head is a critical part of the **3.7L Hemi V8**, renowned for its robust hemispherical combustion chambers, which maximize airflow and combustion efficiency, resulting in a potent and smooth power delivery. Crafted from high-quality cast aluminum, the head is engineered to withstand the intense heat and pressure generated during high-performance operation, ensuring durability and longevity even under demanding conditions. The **R6637022** is specifically tailored for the **passenger-side installation** on the Liberty, Wrangler, and Grand Cherokee models produced between 2002 and 2004, making it a direct-fit replacement for worn or damaged heads, whether due to normal wear, overheating, or mechanical failure.

This cylinder head features **four valves per cylinder** two intake and two exhaust each meticulously machined to optimize airflow and maintain peak engine performance. The **intake ports** are designed to funnel air efficiently into the combustion chamber, while the **exhaust ports** are engineered to minimize backpressure, allowing for a cleaner and more powerful exhaust pulse. The **hemispherical combustion chamber** further enhances combustion efficiency by promoting a more uniform flame front, reducing detonation risk, and improving overall power output. Additionally, the head incorporates **high-strength valve springs and retainers**, along with **stainless steel valves**, to ensure reliable operation and prevent premature failure under high-RPM or high-load conditions.

For those seeking to restore or upgrade their Jeep s engine, this **OEM-quality cylinder head** provides a seamless replacement option that maintains factory specifications while offering the durability and performance expected from a Chrysler Hemi. Whether used in a **restomod project, performance build, or simple reliability upgrade**, the **R6637022** ensures that the 3.7L Hemi continues to deliver its legendary blend of torque and smoothness. Proper installation requires **sealing the head gasket, torqueing bolts to factory specifications, and ensuring proper valve lash adjustments**, but the result is a restored or enhanced engine that turns heads and delivers power with confidence. Perfect for both restoration enthusiasts and performance-minded drivers, this part is a must-have for preserving or enhancing the legendary performance of the 3.7L Hemi V8.

### Pros and Cons of Buying a Jeep Wrangler JK (2002-2004) 3.7L Passenger-Side Right Cylinder Head (Part Number R6637022)

#### **Pros:**

1. **Common and Widely Available** The 3.7L Chrysler (Mopar) V6 engine is one of the most popular in Jeep Wranglers from the JK generation (2007 ) and earlier models like the TJ (1997-2006). While this specific part is for a 2002-2004 Liberty (which uses the same engine), the 3.7L head is a well-documented and frequently replaced component. This means you ll find it easily in aftermarket stores, online marketplaces, and even at junkyards.

2. **Affordable Replacement Cost** Compared to other high-performance or specialty engine parts, a new or remanufactured 3.7L cylinder head is relatively inexpensive, typically ranging from $200 to $500 depending on whether it s new, used, or remanufactured. Labor costs for installation are also reasonable, especially if you re comfortable doing it yourself.

3. **Proven Reliability** The 3.7L V6 is a robust engine when maintained properly. The cylinder heads are cast aluminum and, when in good condition, can last for hundreds of thousands of miles. If you re replacing a worn or leaking head, you re essentially restoring the engine to like-new condition.

4. **Easy to Work On** The 3.7L engine is straightforward to disassemble and reassemble, especially for someone with basic mechanical experience. The heads bolt off relatively easily, and there are plenty of tutorials and forums (like Jeep forums or Mopar-specific sites) to guide you through the process.

5. **Compatibility with Modifications** If you plan to modify your Jeep (e.g., forced induction, high-flow headers, or performance tuning), a fresh cylinder head can help support those upgrades. The 3.7L is a popular platform for tuning, and aftermarket parts like intake manifolds, exhaust headers, and performance cams are readily available.

6. **Long-Term Engine Health** Ignoring head issues (like leaks, warping, or carbon buildup) can lead to more severe problems like valve seat wear, exhaust manifold cracks, or even catastrophic failure. Replacing a faulty head prevents these issues and extends the life of your engine.

7. **Remanufactured Options** Many reputable companies (like Mopar, Summit Racing, or local machine shops) offer remanufactured cylinder heads that are inspected, cleaned, and rebuilt to factory or better specifications. These can be a cost-effective alternative to buying new.

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#### **Cons:**

1. **Potential for Hidden Damage** If the head is being removed due to leaks, cracks, or warping, there s a risk that other issues (like warped valves, worn valve seats, or exhaust port erosion) may not be immediately obvious. A thorough inspection by a mechanic is recommended before purchasing a used or remanufactured head to avoid surprises.

2. **Labor-Intensive Installation** While the head itself is easy to remove, the process of removing and reinstalling it involves clearing the engine bay, disconnecting components, and ensuring proper gasket sealing. If you re not comfortable with engine work, you may need to pay for professional labor, which can add to the cost.

3. **Gasket and Seal Replacement** Every time you replace a cylinder head, you ll need to replace the head gasket, valve cover gasket, and sometimes the oil filter housing gasket. These are relatively cheap but add to the total cost if you re not already stocked up on them.

4. **Risk of Over-Tightening** The 3.7L cylinder head bolts require precise torque specifications to avoid stripping threads or warping the head. Over-tightening can lead to cracked heads or damaged bolts, so following the torque chart carefully is essential.

5. **Potential for Counterfeit or Low-Quality Parts** If buying online, there s a risk of receiving a counterfeit or poorly remanufactured part. Stick to reputable sellers (e.g., Mopar, Summit Racing, or well-reviewed eBay sellers) to avoid this issue.

6. **Time-Consuming Process** If you re doing this as a DIY project, the process can take several hours, especially if you re new to engine work. This may not be ideal if you re on a tight schedule or need the Jeep back quickly.

7. **Compatibility with Older Models** While the 3.7L engine is common, the specific part number (R6637022) is for the 2002-2004 Jeep Liberty. If you re working on a different Jeep model (e.g., a Wrangler JK or TJ), double-check that the part number matches your engine s configuration. Some early 3.7L engines (especially pre-2002) may have slight differences in head design.

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### **Conclusion:**

Replacing a 3.7L cylinder head (R6637022) in a Jeep Liberty (2002-2004) is a practical and often necessary maintenance task for restoring engine performance and preventing further damage. The part is widely available, affordable, and relatively easy to install, making it a smart investment for anyone looking to maintain or upgrade their Jeep s engine.

However, the process requires careful attention to detail especially when it comes to torque specifications, gasket replacement, and part quality to avoid costly mistakes. If you re comfortable with basic engine work or have access to a mechanic for guidance, this is a worthwhile project. For those less experienced, it may be worth paying for professional installation to ensure it s done correctly.

### **Recommendation:**

- **Buy from a reputable source** (e.g., Mopar, Summit Racing, or a trusted local machine shop) to ensure quality, especially if opting for a remanufactured head.

- **Inspect the head thoroughly** before purchasing if buying used. Look for cracks, warping, or signs of overheating.

- **Replace all gaskets** (head gasket, valve cover gasket, oil filter housing gasket) during installation to prevent leaks.

- **Follow torque specifications precisely** to avoid damaging the head or bolts.

- **Consider professional installation** if you re not confident in your mechanical skills, as improper installation can lead to engine issues.

- **Document the process** with photos or notes in case you need to refer back to it later.

If you re replacing the head due to leaks, overheating, or poor performance, addressing the root cause (e.g., coolant leaks, thermostat issues, or oil contamination) is also important to prevent future problems. Overall, this is a solid upgrade for anyone maintaining a 3.7L Jeep engine.

Details:

JEEP LIBERTY 02-04 3.7L, RH. Cylinder Head. Search for more parts JEEP LIBERTY.

part #: r6637022 prices

  • $391.80-$1049.19

specifications cylinderheapar:

  • for models: Liberty
  • for makes: Jeep
  • for years: 2002-2004
  • mpn: R6637022
  • part type: Cylinder Head
  • id: 3be7593a-f727-44f8-8a04-b652999823d8
  • interchange: 306-1844

shipping cylinderheapar:

  • transit: 3-7 Days
  • class: Standard
  • type: Fixed
  • cost: $0.00
  • service: Standard

general cylinderheapar:

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

returns cylinderheapar:

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

offer cylinderheapar:

  • quantity: 1
  • started: February 3, 2026
  • availability: In Stock
  • best offers: True
  • sold: 0
  • options: Ship-to-home

seller cylinderheapar:

  • # reviews: 14109
  • rating: 99.3%
  • city: Brush, Colorado

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for models: liberty, for makes: jeep, for years: 2002-2004, part type: cylinder head, id: 3be7593a-f727-44f8-8a04-b652999823d8, interchange: 306-1844,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 11433237734616632,
Jeep R6637022 Is Similar To:
cylinderheapar logo
5 offers $391.80–$1049.19 USD
  • Used. Offer #1 priced at $525.00 + $0.00 shipping estimate = $525.00* total. Year: 2004 Model: JEEP LIBERTY.FREE SHIPPING
  • Used. Offer #2 priced at $391.80 + $0.00 shipping estimate = $391.80* total. Year: 2002.FREE SHIPPING
  • Used. Offer #3 priced at $1049.19 + $0.00 shipping estimate = $1049.19* total. Unless specified as Universal this is a direct fit Engine Complete Assembly.FREE SHIPPING
  • Used. Offer #4 priced at $992.00 + $300.00 shipping estimate = $1292.00* total. +$300.00 shipping
  • Used. Offer #5 priced at $120.00 + $180.02 shipping estimate = $300.02* total. RH,1/03,3.7L,RENEGAD Sold As Bare Head Only DODGE 1500 PICKUP 02-04 3.7L, R.+$180.02 shipping

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