JOHN DEERE R121402 Engine Cylinder Head Dkv Skidsteer 4045 Engine.

( Brand: John Deere ), ( Manufacturer Part Number: R121402 ), ( Type: Cylinder Head ), ( Manufacturer Warranty: 2 Years ), ( Items Included: Gasket, Gasket Kit ), ( Material: Cast Iron ), ( Finish: Unfinished ), ( Country Of Origin: United States )

Review JOHN DEERE Engine Cylinder Head Dkv Engine. Was Jd Skidsteer

The **Deere R121402 Engine Cylinder Head (4045 DKV)** is a precision-engineered, high-performance component designed exclusively for John Deere skid-steer loaders, ensuring optimal combustion efficiency and long-term reliability in demanding construction and industrial applications. Crafted from high-grade cast iron, this cylinder head is meticulously machined to exacting specifications, featuring a robust **4045 DKV combustion chamber design** that maximizes air-fuel mixture turbulence for superior power output and fuel economy. The head incorporates **four precision-bored valve seats** and **high-flow intake and exhaust ports**, engineered to minimize restriction and enhance airflow, which is critical for maintaining peak engine performance under heavy loads. The **integrated valve guide and retainer system** ensures smooth operation while reducing wear, while the **cast-in cooling passages** provide efficient heat dissipation, preventing overheating during extended use. This cylinder head is fully compatible with John Deere s **4045 diesel engine series**, including models like the **4045T, 4045D, and 4045DKV**, making it an essential replacement part for skid-steer operators who demand durability and efficiency. Whether used in compacting soil, lifting heavy materials, or operating in rugged terrain, this cylinder head delivers consistent performance, reducing downtime and extending the lifespan of the engine. Built to meet John Deere s stringent quality standards, it is a direct-fit replacement that restores factory specifications, ensuring seamless integration with the existing engine components. For operators who prioritize performance, longevity, and ease of maintenance, the **R121402 cylinder head** is an indispensable upgrade that keeps skid-steer loaders running at peak efficiency for years to come.

Buying a **Deere R121402 engine cylinder head (4045 DKV) for a JD (John Deere) skid steer** can be a practical solution for repairs, but it comes with several considerations. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a Used/Aftermarket Deere R121402 Cylinder Head (4045 DKV)**

1. **Cost-Effective Repair**

- Replacing a cylinder head can be significantly cheaper than buying a complete engine. A used or remanufactured head may cost a fraction of the price of a new engine, saving thousands of dollars.

2. **Availability of Parts**

- Deere engines are widely used, and parts like cylinder heads are relatively easy to source, especially from authorized dealers, remanufacturers, or online marketplaces. This reduces downtime for equipment.

3. **Remanufactured Quality**

- Many cylinder heads are remanufactured to OEM specifications, ensuring they meet performance and durability standards. Reputable remanufacturers perform inspections, machining, and testing to restore functionality.

4. **Compatibility with JD Skid Steers**

- The **4045 DKV** engine (common in JD skid steers like the 200-300 series) uses this cylinder head, so sourcing it is straightforward. Cross-reference the engine model to confirm compatibility.

5. **Long-Term Reliability**

- If properly installed and maintained, a remanufactured or high-quality used cylinder head can last as long as an original part, reducing future repair costs.

6. **Reduced Environmental Impact**

- Purchasing a used or remanufactured part instead of new reduces waste and supports recycling efforts in the heavy equipment industry.

7. **Warranty Options**

- Some remanufacturers offer warranties (e.g., 12-24 months), providing peace of mind against premature failure.

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### **Cons of Buying a Used/Aftermarket Deere R121402 Cylinder Head**

1. **Quality Variability**

- Not all used or aftermarket parts are equal. Some may have hidden damage (cracks, warping, or worn valves) that isn t immediately visible. Inspecting the part thoroughly or purchasing from a trusted source is critical.

2. **Potential for Mismatched Specifications**

- If the cylinder head is not properly matched to the engine s block or other components (e.g., incorrect valve sizes, gasket dimensions, or bolt patterns), it can lead to leaks, poor sealing, or even engine damage.

3. **Installation Complexity**

- Replacing a cylinder head requires specialized tools, expertise, and proper sealing (e.g., gaskets, torque specifications). Improper installation can cause coolant leaks, overheating, or compression loss.

4. **Hidden Costs**

- Gaskets and seals

- Valve springs and guides (if worn)

- Machining or reconditioning (if the block is not perfectly flat)

- Labor (if not doing the work yourself)

- These additional costs can offset the initial savings.

5. **Warranty Limitations**

- Used parts typically come with limited or no warranties, whereas new OEM parts often include full coverage. If the part fails shortly after installation, you may bear the full repair cost.

6. **Risk of Counterfeit or Low-Quality Parts**

- The aftermarket is flooded with knockoff or substandard parts that may fail prematurely or damage the engine. Always verify the seller s reputation and part authenticity.

7. **Downtime During Replacement**

- Even with a used part, the repair process can take time, especially if the engine needs disassembly, inspection, or additional repairs (e.g., block resurfacing).

8. **Depreciation of Used Parts**

- Used cylinder heads lose value over time, and if you later decide to sell the equipment, the repair may not add to its resale value.

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### **Key Considerations Before Purchasing**

- **Source Verification**: Buy from a reputable dealer, remanufacturer, or auction with a return policy. Avoid unknown sellers offering parts at suspiciously low prices.

- Cracks in the casting or around bolt holes.

- Uneven surfaces (use a straightedge to check for warping).

- Worn or damaged valve seats or guides.

- **Compatibility Check**: Confirm the part number matches your engine (e.g., **4045 DKV** for JD skid steers with the R121402 engine). Some engines use slightly different heads (e.g., **4045 DKV vs. 4045 DKV-2**).

- **Professional Installation**: Unless you have experience, have a certified mechanic perform the installation to avoid costly mistakes.

- **Budget for Extras**: Account for gaskets, seals, and potential additional repairs (e.g., resurfacing the block if needed).

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### **Conclusion**

Buying a **Deere R121402 cylinder head (4045 DKV)** for a JD skid steer can be a **cost-effective and practical solution** for repairing a damaged head, especially if the engine is otherwise sound. The part is widely available, and remanufactured options often restore performance to near-OEM levels. However, the decision requires careful consideration of **quality, compatibility, installation, and hidden costs**.

- Source the part from a trusted supplier.

- Verify its condition before purchase.

- Budget for additional repairs or labor.

- Ensure proper installation.

If the cylinder head is **severely damaged, cracked, or mismatched**, it may be more economical to consider a **remanufactured engine** or a **used engine swap** instead.

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### **Recommendation**

1. **Start with a Remanufactured Part**: Purchase from a **Deere-authorized remanufacturer** (e.g., **Deere & Company s official reman program**, **Caterpillar Reman**, or reputable third-party remanufacturers like **Power Systems Remanufacturing** or **John Deere Parts & Service**). These parts come with warranties and are inspected for quality.

- Example suppliers: Deere Parts Online (https://www.deereparts.com), Power Systems Reman (https://www.powersystemsreman.com), or local JD dealerships.

2. **Inspect Thoroughly**: If buying used, **inspect the part in person** or request detailed photos/videos from the seller. Look for signs of damage and confirm the part number matches your engine.

- New gaskets/seals.

- Block resurfacing (if needed).

- Professional labor (unless DIY is feasible).

4. **Consider a Used Engine as an Alternative**: If the cylinder head is beyond repair and the engine is otherwise functional, a **used Deere R121402 engine** (e.g., from a wrecked skid steer) may be cheaper than a new head labor.

5. **Avoid Cheap Knockoffs**: Steer clear of unbranded or suspiciously low-cost parts, as they risk damaging your engine or voiding warranties.

6. **Document the Repair**: Keep records of the part s origin, warranty details, and installation date for future reference.

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### **Final Verdict**

For most JD skid steer owners facing a **cylinder head failure**, buying a **remanufactured Deere R121402 head (4045 DKV)** is the **best balance of cost and reliability**. It saves money compared to a new engine while maintaining performance. However, **due diligence in sourcing and installation is critical** to avoid costly mistakes. If unsure, consult a **Deere-certified technician** to assess whether the part is worth the investment for your specific situation.

Details:

Never installed. Head is in good, no cracks. Needs a little cleaning. Valves are installed.

Engines were used in several JD equipment model's. Comes with gasket kit, sleeves, pistons, rings. Head was purchased for a JD skid steer engine model number 4045DKV50.

part #: r121402 prices

• $600.00-$1700.00

specifications cylinderheapar:

• for makes: John-deere
• brand: John Deere
• mpn: R121402
• type: Cylinder Head
• manufacturer warranty: 2 Years
• items included: Gasket, Gasket Kit
• material: Cast Iron
• finish: Unfinished
• country of origin: United States

payments cylinderheapar:

• other
• credit card: Visa
• wallet: Paypal

returns cylinderheapar:

• policy: No Returns

general cylinderheapar:

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

shipping cylinderheapar:

• type: Fixed
• carrier: UPS
• class: Standard
• transit: 2-6 Days
• cost: $150.00
• service: UPS Ground

offer cylinderheapar:

• options: Ship-to-home
• started: March 19, 2026
• availability: In Stock
• best offers: True
• quantity: 1
• sold: 0

seller cylinderheapar:

• rating: 100.0%
• city: Weldona, Colorado
• # reviews: 683

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