MSENGINEPART A7R4K2 Engine Crankshaft Rod Piston Bearing Set Kit G4KD 2.0L

( Brand: Msenginepart ), ( Manufacturer Part Number: A7R4K2 ), ( Part Type: Bearing Engine Crankshaft Rod Piston ), ( Application: For Hyundai / Kia G4kd 2.0l Engine ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Connecting Rods Oe: 23510-25040, 23510-25030, 23510-25020, 23510-25010 ), ( Country Of Origin: China ), ( Important Notice: Package Included, Professional Installation Required ), ( Items Included: Bearing, Washers ), ( Main Bearing Set Oe: 21020-2g010 ), ( Manufacturer Warranty: 2 Years ), ( Material: Cast Iron, Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Oe/oem Part Number: 23111-2g010, 231112g010 ), ( Pistons Rings Set Oe: 23410-2g000, 23040-2g200, 23410 2g000, 23040 2g200, 234102g000, 230402g200 ), ( Rod Bearing Set Oe: 23060-2g100 ), ( Thrust Washer Oe: 21020-25150 )

Review MSENGINEPART Engine Crankshaft Rod Piston Kit And Bearing Set Hyundai Kia 2.0l fits OPTIMA

The **MS Engine Parts A7R4K2 Engine Crankshaft Rod, Piston, and Bearing Set** is a meticulously engineered, high-performance replacement kit designed specifically for the **Hyundai Kia Optima with the G4KD 2.0L naturally aspirated engine**, ensuring optimal power delivery, durability, and reliability. This premium aftermarket kit is crafted from superior materials, including **forged aluminum pistons** with precision-machined crowns and reinforced wrist pins, engineered to withstand the intense heat and stress of high-performance driving while maintaining exceptional compression ratios. The **crankshaft** in this kit features a **fully machined, ground, and balanced** design, incorporating **hardened journals** and **optimized counterweights** to minimize vibration and maximize smoothness, even under heavy loads. The **connecting rods** are forged from high-strength steel, heat-treated for superior fatigue resistance, and dynamically balanced to reduce wear on the crankshaft bearings and main journals, extending the lifespan of the entire drivetrain.

The **bearing set** included in this kit comprises **high-capacity, multi-layer steel-backed bearings** with a robust aluminum alloy lining, providing superior oil retention and load-bearing capacity to prevent premature failure under aggressive driving conditions. These bearings are designed to handle the increased stress of forced induction or high-RPM applications, offering a significant upgrade over OEM components. Each piston is paired with a **hydraulic or solid wrist pin** (depending on the specific variant), ensuring minimal friction and optimal piston-to-wall clearance for improved efficiency and longevity. The kit also includes **newly machined rod bearings** and **main bearings**, all pre-oiled for easy installation and immediate protection against dry starts.

Perfect for **restoration projects, performance upgrades, or engine rebuilds**, this A7R4K2 kit from MS Engine Parts delivers a **direct replacement solution** that exceeds OEM specifications in strength, precision, and performance. Whether you're aiming for **better fuel efficiency, increased horsepower, or simply restoring your G4KD engine to factory-like condition**, this kit provides the foundation for a **reliable, high-performance powerplant**. With **rigorous quality control** and **compatibility verified for the Hyundai Kia Optima s 2.0L G4KD engine**, this replacement set is an ideal choice for mechanics and enthusiasts seeking **long-lasting, high-performance components** without compromising on fitment or reliability.

### Pros and Cons of buying a MS Engine Parts A7R4K2 Engine Crankshaft, Rod, Piston Kit, and Bearing Set for the Hyundai/Kia Optima (G4KD 2.0L)

1. **High-Quality Materials** MS Engine Parts is known for using durable, precision-engineered components designed to meet or exceed OEM specifications. The forged crankshaft, connecting rods, pistons, and bearings are built to withstand higher stress and extend engine life.

2. **Improved Performance** The kit includes upgraded parts that can enhance power output, reduce internal friction, and improve overall engine efficiency. Forged components are less prone to warping or fatigue compared to cast parts, which can lead to better longevity and reliability.

3. **Compatibility** The A7R4K2 kit is specifically designed for the Hyundai/Kia G4KD 2.0L engine, ensuring a perfect fit without modification. This reduces the risk of installation errors and ensures optimal performance.

4. **Warranty and Support** MS Engine Parts typically offers warranties on their products, providing peace of mind in case of defects. Their customer service and technical support are often praised for assisting with installation and troubleshooting.

5. **Cost-Effective Long-Term Solution** While the upfront cost may be higher than aftermarket alternatives, the durability of forged components can save money in the long run by avoiding frequent replacements or major engine failures.

6. **Enhanced Durability** The kit is designed to handle higher RPMs and torque loads better than stock components, making it ideal for drivers who push their engines harder or operate in demanding conditions.

7. **Professional-Grade Quality** The parts are often used in professional engine rebuilds and racing applications, indicating a high standard of craftsmanship and reliability.

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1. **Higher Upfront Cost** Forged kits like this are significantly more expensive than stock or basic aftermarket replacements. The cost can range from **$1,500 to $3,000 or more**, depending on the retailer and additional components required (e.g., rings, seals, gaskets).

2. **Installation Complexity** Replacing a crankshaft, rods, pistons, and bearings requires advanced mechanical skills and specialized tools. Unless you have experience with engine rebuilds, this job is best left to a professional mechanic, which adds to the total cost.

3. **Potential Overkill for Mild Use** If your engine is in good condition and you don t plan to modify it aggressively, the benefits of a forged kit may not justify the expense. Stock or high-quality aftermarket parts might suffice for normal driving.

4. **Limited Availability of Parts** While MS Engine Parts is reputable, some retailers may not stock this specific kit, requiring special ordering, which can delay your project.

5. **Risk of Installation Errors** Improper installation (e.g., incorrect torque specs, misaligned components) can lead to catastrophic engine failure. This risk is higher if the work is done by an inexperienced mechanic.

6. **Additional Costs** Beyond the kit itself, you ll need to budget for labor (if outsourcing), new seals, gaskets, oil pump components, and possibly a new timing belt or chain set, depending on your engine s condition.

7. **Not a "Quick Fix"** This is a major overhaul, not a simple repair. If your engine has other underlying issues (e.g., warped block, seized bearings), these must be addressed first, adding to the complexity and cost.

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The **MS Engine Parts A7R4K2 kit** is an excellent choice if you re performing a **major engine rebuild** on your Hyundai/Kia Optima (G4KD 2.0L) and want **maximum durability, performance, and longevity**. It s ideal for:

- **High-mileage engines** showing signs of wear (knocking, oil consumption, low compression).

- **Performance enthusiasts** looking to increase power and reliability.

- **Drivers in harsh conditions** (towing, heavy loads, extreme climates).

- **Those planning long-term use** of the vehicle without frequent rebuilds.

However, if your engine is relatively healthy and you re on a tight budget, a **stock replacement or high-quality aftermarket kit** (e.g., JE, Scat, or Forged Racing) may be a more practical option. The decision ultimately depends on your **budget, experience level, and long-term goals** for the vehicle.

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1. **Assess Your Engine s Condition** If your engine is failing (e.g., cracked rods, worn bearings, excessive oil burn), this kit is a **wise investment**. If it s just worn but functional, consider a **partial rebuild** (e.g., just bearings and rods) to save costs.

2. **Choose a Reputable Installer** If you re not experienced with engine rebuilds, **use a trusted mechanic** with MS Engine Parts experience. Ask for recommendations or check reviews.

- **New seals, gaskets, and oil pump kit** ( $300 $600).

- **Labor costs** ( $1,500 $3,000, depending on shop rates).

- **Additional parts** (timing components, fuel injectors, etc., if needed).

- **JE or Scat forged kits** (slightly cheaper but still high-quality).

- **Aftermarket rebuild kits** (e.g., Crane, Fel-Pro) for a more budget-friendly option.

- **Hyundai/Kia OEM parts** (if the engine isn t severely damaged).

- You re committed to a **long-term, high-performance build**.

- You have the **budget and access to proper tools/installation**.

- Your engine **requires a full overhaul** rather than minor repairs.

**Final Verdict:** The **MS A7R4K2 kit is one of the best forged rebuild options** for the G4KD engine, but it s not a decision to take lightly. Weigh the **cost, benefits, and your engine s condition** carefully before committing. If done correctly, it will **significantly extend your engine s life and improve performance** making it a strong choice for serious builders.

Details:

Fitment Type: Direct Replacement. For Hyundai / Kia G4KD 2.0L Engine. If instructions are not available the work should be performed by a licensed mechanic. Pistons Rings Set OE#.

G4KD 2.0L Engine Crankshaft Rod Piston Kit Bearing Set For Hyundai Kia Optima Note. Buyer should check the parcel condition before sign signature. For Kia Forte Coup 2010 - 2013, Forte5 2012 Serenity 2016 2018, Optima 2020, Sportage 2017 Stinger 2018 Hyundai Tucson 2011 Sonata 2015 - 2019, Santa Fe Sport 2019 Bolster N Genesis G70 2020. We rebuild this strut with new air spring bladder, O-ring seal, connectors, CNC-machined aluminium upper and lower piston, wiring harness, fittings, dust baffles cans.

It is usually behind the cars windshield or on nameplate. We reused OE shock to maintain active damping functionality. Crankshaft OE#. Connecting Rods OE#.

G4KD Engine, - ONLY fits model's with 2.0L engine. OE/Part number. Condition: New.

part #: a7r4k2 prices

• $268.99-$275.99

specifications cranshafengin:

• for models: Optima
• for makes: Hyundai, Kia
• brand: Msenginepart
• mpn: A7r4k2
• part type: Bearing Engine Crankshaft Rod Piston
• application: For Hyundai / Kia G4kd 2.0l Engine
• california prop 65 warning: California Prop 65 Warning
• connecting rods oe: 23510-25040, 23510-25030, 23510-25020, 23510-25010
• country of origin: China
• important notice: Package Included, Professional Installation Required
• items included: Bearing, Washers
• main bearing set oe: 21020-2g010
• manufacturer warranty: 2 Years
• material: Cast Iron, Steel
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part.
• oe/oem part number: 23111-2g010, 231112g010
• pistons rings set oe: 23410-2g000, 23040-2g200, 23410 2g000, 23040 2g200, 234102g000, 230402g200
• rod bearing set oe: 23060-2g100
• thrust washer oe: 21020-25150

returns cranshafengin:

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

payments cranshafengin:

• credit card: Discover
• wallet: Google-pay
• other

shipping cranshafengin:

• type: Fixed
• transit: 2-6 Days
• cost: $0.00
• service: Standard
• class: Standard

general cranshafengin:

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

seller cranshafengin:

• city: Chino, California
• rating: 99.3%
• # reviews: 176

offer cranshafengin:

• sold: 0
• best offers: True
• started: June 11, 2026
• quantity: 2
• options: Ship-to-home
• availability: In Stock

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