1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 12260478878202723
  3. JEEP R6857034AC

JEEP R6857034AC Right Passenger Engine Motor Cylinder Head 5.7

fits model: Cherokee, Grand. make: Jeep. year: 2006–2008.

R6857034ac Jeep 06-08 Grand Cherokee 5.7 Right Passenger Side Engine Motor Cylinder Head

( Manufacturer Part Number: R6857034AC ), ( Interchange: 306-119 ), ( Type: Cylinder Head ), ( Id: 3b430e3e-6c18-43ea-92a6-cf02d249a112 ), ( Country Of Origin: United States )

Review JEEP 5.7 Right Passenger Side Engine Motor Cylinder Head fits CHEROKEE GRAND 2006–2008

The **Jeep R6857034AC 5.7L V8 Engine Cylinder Head (Right Passenger Side, Models: 2006 2008 Cherokee)** is a precision-engineered component designed to deliver reliable performance and durability for Jeep s iconic 5.7L Magnum V8 engine, commonly found in the 2006 through 2008 Cherokee models. Crafted from high-quality cast iron, this right-side cylinder head is meticulously machined to ensure optimal sealing, cooling, and combustion efficiency, contributing to the engine s robust power output and longevity. The head features a robust valve cover with integrated mounting points, allowing for secure attachment of the valve cover gasket and associated components, while its integrated rocker arm assembly ensures precise camshaft-to-valve operation. The design incorporates four intake and four exhaust valves per cylinder, arranged in a pushrod-actuated configuration, which enhances airflow and combustion dynamics for improved throttle response and fuel economy. This cylinder head is compatible with the **EFI (Electronic Fuel Injection)** system, supporting Jeep s fuel-optimized engine management, and is engineered to withstand the thermal and mechanical stresses of high-performance driving conditions. Whether used for routine maintenance, performance upgrades, or engine rebuilds, this replacement part ensures a seamless fit with the stock engine bay, maintaining the original vehicle s performance characteristics while offering the reliability of a direct OEM replacement. Proper installation requires careful attention to gasket alignment, torque specifications, and valve adjustment to guarantee optimal engine function and prevent potential leaks or misfires.

### Pros and Cons of Buying a Rebuilt Jeep 5.7L (R6857034AC) Cylinder Head for a 2006-2008 Cherokee

#### **Pros:**

1. **Cost-Effective Solution** Rebuilding or replacing a cylinder head is often cheaper than buying a complete engine or transmission. A rebuilt head can restore performance and reliability without the expense of a full engine swap.

2. **Restored Performance** A properly rebuilt head ensures proper sealing, cooling, and combustion efficiency. This can improve horsepower, torque, and overall engine performance, especially if the original head was worn or damaged.

3. **Prevents Further Damage** Ignoring head issues (such as leaks, warping, or valve problems) can lead to catastrophic engine failure. Addressing it early avoids costly repairs down the line.

4. **Compatibility** The R6857034AC is a known part number for the 5.7L Magnum engine used in the 2006-2008 Jeep Cherokee. It is widely available from Jeep dealers, aftermarket suppliers, and online marketplaces, ensuring easy sourcing.

5. **Warranty Coverage** If purchased from a reputable supplier or dealer, the rebuilt head may come with a warranty, providing peace of mind against premature failure.

6. **DIY-Friendly** While installation requires mechanical skill, many Jeep owners with basic tools and experience can replace a head themselves, saving labor costs.

7. **Improved Reliability** A fresh head reduces the risk of misfires, overheating, or oil consumption caused by worn valve seals or guides.

---

#### **Cons:**

1. **Labor-Intensive Installation** Removing and reinstalling a cylinder head requires disassembling the engine, which is time-consuming and may require specialized tools (e.g., head gasket removal tools, torque wrench).

2. **Potential for Hidden Issues** Even a rebuilt head may have underlying problems if not properly inspected. Issues like warping, cracked valves, or poor machining can persist if the rebuild was rushed or low-quality.

3. **Cost of Additional Parts** Beyond the head itself, you may need new gaskets, bolts, seals, and possibly valves or springs if they were damaged during removal. These add to the total cost.

4. **Risk of Overheating or Cooling Problems** If the cooling system was neglected before the head failure, addressing it now may require additional work (e.g., flushing the coolant, checking the water pump, or replacing the thermostat).

5. **Skill Dependency** If the installer lacks experience, improper torque, sealing, or alignment can lead to leaks, compression loss, or even engine damage.

6. **Time Commitment** The process can take several hours (or even days) depending on the owner s experience and available tools.

7. **Market Variability** Prices for rebuilt heads can vary widely. A low-cost option may not be as durable as a higher-end, professionally rebuilt part.

---

### **Conclusion:**

Buying a rebuilt Jeep 5.7L cylinder head (R6857034AC) for a 2006-2008 Cherokee is a pragmatic choice for restoring engine function without the expense of a full engine replacement. It offers significant performance and reliability benefits while preventing further damage. However, the process demands mechanical skill, patience, and attention to detail. The key to success lies in sourcing a high-quality rebuilt head, ensuring all related components (gaskets, bolts, etc.) are fresh, and following proper installation procedures.

If you lack confidence in your ability to perform the work, consulting a trusted mechanic may be worthwhile, despite the added labor cost. For DIY enthusiasts with the right tools and experience, this is a cost-effective way to extend the life of an otherwise sound engine.

### **Recommendation:**

- **Purchase from a reputable supplier** (e.g., Jeep dealership, RockAuto, or a trusted aftermarket parts seller) with a warranty.

- **Verify the rebuild quality** Ask for proof of machining, valve inspection, and gasket replacement.

- **Prepare for additional costs** Budget for new gaskets, bolts, and any necessary engine components (e.g., valves, springs).

- **Follow a step-by-step guide** Use resources like Chilton manuals or Jeep-specific repair guides to ensure proper installation.

- **Consider professional help if unsure** If the engine has other issues (e.g., worn bearings, rod damage), a mechanic may recommend a full rebuild or replacement.

Ultimately, this is a smart investment for keeping your Jeep running reliably, provided you approach it methodically.

Details:

This item is from a 08 JEEP GRAND CHEROKEE. If listing states free shipping, shipping is within the 48 only. Also, any tests that can possibly be done prior to installation should completed at time. Over 6,000 vehicles in the yard and more arriving daily.

Local delivery available to local businesses only. Redeliver, limited access fees. Model: JEEP GRAND CHEROKEE. Over 600,000 parts on inventory.

Cylinder Head.

part #: r6857034ac prices

  • $285.00-$648.00

specifications cylinderheapar:

  • for models: Cherokee, Grand
  • for makes: Jeep
  • for years: 2006-2008
  • mpn: R6857034ac
  • interchange: 306-119
  • type: Cylinder Head
  • id: 3b430e3e-6c18-43ea-92a6-cf02d249a112
  • country of origin: United States

payments cylinderheapar:

  • credit card: Visa
  • wallet: Apple-pay
  • other

returns cylinderheapar:

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

shipping cylinderheapar:

  • transit: 3-7 Days
  • service: Standard
  • type: Fixed
  • class: Standard
  • cost: $145.00

offer cylinderheapar:

  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • started: June 8, 2026
  • quantity: 1

general cylinderheapar:

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

seller cylinderheapar:

  • # reviews: 35216
  • rating: 100.0%
  • city: Cochranton, Pennsylvania
for models: cherokee, grand, for makes: jeep, for years: 2006-2008, interchange: 306-119, type: cylinder head, id: 3b430e3e-6c18-43ea-92a6-cf02d249a112, country of origin: united states,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 12260478878202723,
Jeep R6857034AC Is Similar To:
cylinderheapar logo
5 offers $285.00–$648.00 USD
  • Used. Offer #1 priced at $285.00 + $145.00 shipping estimate = $430.00* total. Cylinder Head Model: JEEP GRAND CHEROKEE.+$145.00 shipping
  • New. Offer #2 priced at $301.99 + $0.00 shipping estimate = $301.99* total. 2 High Quality & Brand New 3 Two Year Warranty FAST FREE SHIPPING.FREE SHIPPING
  • New. Offer #3 priced at $648.00 + $0.00 shipping estimate = $648.00* total. Dodge Ram 3500 5.7L Hemi 2003-2008. Dodge Jeep Chrysler Hemi Cylinder Heads.FREE SHIPPING
  • New. Offer #4 priced at $648.00 + $0.00 shipping estimate = $648.00* total. FREE SHIPPING
  • New. Offer #5 priced at $578.00 + $0.00 shipping estimate = $578.00* total. FREE SHIPPING

Copyright © cylinderheapar.com