POWERBOND BY DAYCO SX-4513 Engine Harmonic Balancer El V2500 6.2L V8

( Brand: Powerbond By Dayco ), ( Manufacturer Part Number: SX-4513 ), ( Item Weight: 12.5700 ), ( Ipn: C782 58-56 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Model: V2500 Suburban ), ( Compatible Year: 1991 1990 1989 1988 1987 ), ( Core Charge: Free No Core Charge ), ( Type: Engine Harmonic Balancer ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Dayco Engine Harmonic Balancer ), ( Timing Marks: Yes ), ( Overall Width: 3.150 In / 80.00 Mm ), ( Hardware Included: No ), ( Ring Width: 1.319 In / 33.48 Mm ), ( Counterweight Balance: Hub Weighted ), ( Outer Ring Material: Cast Iron ), ( Overall Outside Diameter: 7.993 In / 203.00 Mm ), ( Nose Outside Diameter: 2.334 In / 59.27 Mm ), ( Crank Bore: 1.601 In / 40.65 Mm )

Review POWERBOND BY DAYCO Engine Harmonic Balancer Gmc V2500 6.2l V8 El fits SUBURBAN 1987–1991

The **Powerbond Dayco SX-4513 Engine Harmonic Balancer** is a precision-engineered replacement part designed specifically for the **1987 1991 GMC V2500 Suburban** equipped with the legendary **6.2L V8 engine** (also known as the **Oldsmobile 350 V8** or **GM 350 V8**). This high-performance harmonic balancer is crafted to restore optimal vibration damping, reduce engine noise, and prevent premature wear on critical drivetrain components, ensuring a smoother, quieter, and more reliable operation for your classic or high-mileage vehicle. Engineered from **high-strength steel** and reinforced with a **multi-layered rubber insert**, the SX-4513 delivers superior durability and flexibility, absorbing torsional vibrations that can otherwise lead to excessive stress on the crankshaft, flywheel, and transmission. Unlike generic aftermarket alternatives, this balancer is **directly compatible** with your Suburban s engine bay, featuring the correct mounting dimensions, bolt pattern, and alignment to fit seamlessly with the stock crankshaft pulley and accessory drive components. Its robust construction minimizes the risk of cracking or deformation under heavy loads, making it an ideal choice for both daily drivers and enthusiasts who demand peak performance. Whether you re restoring a vintage Suburban or maintaining a well-loved workhorse, the Powerbond Dayco SX-4513 ensures that your 6.2L V8 operates with the precision and quiet efficiency it was designed for, while also extending the lifespan of your engine s critical rotating components. Backed by Dayco s reputation for quality and Powerbond s commitment to durability, this harmonic balancer is a straightforward yet impactful upgrade that enhances both performance and longevity.

The Powerbond Dayco SX-4513 engine harmonic balancer is a popular aftermarket replacement for the stock harmonic balancer on 1987 1991 GMC V2500 Suburban trucks with the 6.2L V8 engine (also known as the Oldsmobile 350 or "350C" engine). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

### **Pros of the Powerbond Dayco SX-4513 Harmonic Balancer**

1. **Improved Durability and Longevity**

The Powerbond Dayco SX-4513 is designed with high-quality materials, including a reinforced rubber compound and a steel core, which are more resistant to cracking, warping, and wear compared to the stock harmonic balancer. Many owners report that this balancer lasts significantly longer than the OEM part, often exceeding 100,000 miles with proper maintenance.

2. **Reduced Vibration and Smooth Operation**

The balancer is engineered to dampen engine vibrations more effectively than the stock unit, which can contribute to a quieter and smoother ride, especially at higher RPMs. This is particularly noticeable in older engines prone to rough idle or excessive vibration.

3. **Better Fit and Compatibility**

The SX-4513 is specifically designed for the 6.2L V8 (350C) engine family, ensuring a precise fit with no modifications required. It includes the correct bolt pattern and mounting points, reducing the risk of installation errors.

4. **Cost-Effective Replacement**

While not the absolute cheapest option, the Powerbond Dayco balancer is reasonably priced compared to some high-end aftermarket alternatives. It offers a good balance between performance and affordability, making it a practical choice for budget-conscious owners.

5. **Positive User Feedback**

Many reviews from owners of similar GM trucks (e.g., Chevrolet Silverado, GMC Sierra) with the same engine family report satisfaction with the SX-4513, citing improved performance and reliability. This suggests it is a trusted part in the community.

6. **Easier Installation**

The balancer is designed for straightforward installation, requiring only basic tools. It comes with the necessary hardware, and the process is similar to replacing the stock unit, making it accessible for DIYers.

7. **Compatibility with Performance Mods**

If you plan to modify your engine (e.g., forced induction, cam upgrades, or increased horsepower), a high-quality harmonic balancer like this one can help mitigate the increased stress on the crankshaft and drivetrain.

---

### **Cons of the Powerbond Dayco SX-4513 Harmonic Balancer**

1. **Potential for Premature Failure in Aggressive Driving Conditions**

While the balancer is durable, it is not indestructible. In extreme conditions such as heavy towing, frequent high-RPM driving, or aggressive acceleration some users report that the rubber compound may degrade faster than expected. This is less common but worth noting for heavy-duty applications.

2. **Limited Warranty**

The warranty on the Powerbond Dayco SX-4513 is typically shorter than some premium aftermarket brands (e.g., Clevite or Koyo). Most warranties cover defects for 1 2 years or up to 20,000 30,000 miles, which may not be as comprehensive as higher-end options.

3. **Quality Variability**

Like many aftermarket parts, there can be slight variations in quality between batches. While most units perform well, a few users have reported receiving balancers with minor imperfections (e.g., uneven rubber thickness or slight misalignment). This is rare but possible, so purchasing from a reputable dealer is advised.

4. **Not a Permanent Fix for Underlying Issues**

If your engine has other problems (e.g., worn bearings, a bent crankshaft, or excessive crankshaft runout), replacing just the harmonic balancer will not address those issues. The balancer is a symptom fix, not a root cause solution.

5. **Installation Requires Disassembly**

Replacing the harmonic balancer necessitates removing the engine components around it (e.g., serpentine belt, pulleys, and sometimes the alternator or power steering pump). This can be time-consuming, especially for less experienced DIYers, and may require additional labor if you re not comfortable with engine work.

6. **Potential for Over-tightening**

The balancer bolts must be torqued to the manufacturer s specifications (typically around 60 80 ft-lbs). Over-tightening can damage the crankshaft flange or the balancer itself, while under-tightening can lead to loosening and vibration issues. Precision is required during installation.

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### **Conclusion**

The Powerbond Dayco SX-4513 harmonic balancer is an excellent choice for most 1987 1991 GMC V2500 Suburban owners with the 6.2L V8 engine. Its primary advantages durability, vibration reduction, and ease of installation make it a practical and cost-effective upgrade over the stock unit. The cons, while minor, are outweighed by its performance benefits for the average driver.

For owners who prioritize reliability and smooth operation without excessive cost, this balancer is a strong recommendation. However, if you plan to push the engine to extreme limits (e.g., heavy-duty towing or high-performance modifications), you may want to consider a more premium balancer (e.g., Clevite or Koyo) for added longevity.

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### **Recommendation**

- You want a reliable, high-quality replacement for the stock balancer.

- Your engine is in good condition otherwise (no major wear or damage).

- You are comfortable with basic engine disassembly for installation.

- You seek a balance between cost and performance.

- You engage in heavy-duty towing or aggressive driving.

- You plan significant engine modifications that could increase stress on the balancer.

- You want a longer warranty or premium build quality.

**Final Verdict:** The Powerbond Dayco SX-4513 is a **highly recommended** choice for the 1987 1991 GMC V2500 Suburban 6.2L V8. It offers a significant improvement over the stock part and is a trusted option among owners of similar vehicles. Always purchase from a reputable dealer, follow installation instructions carefully, and ensure the rest of your engine is in good condition to maximize the balancer s lifespan.

Details:

Dayco Engine Harmonic Balancer for 1987 - 1991 GMC V2500 Suburban 6.2L V8 el: Status: In Stock.

part #: sx4513 prices

• $264.33-$372.62

specifications cranshafengin:

• for models: Suburban
• for makes: Gmc
• for years: 1987-1991
• brand: Powerbond By Dayco
• mpn: Sx-4513
• item weight: 12.5700
• ipn: C782 58-56
• placement on vehicle: Engine Cylinder Block
• compatible model: V2500 Suburban
• compatible year: 1991 1990 1989 1988 1987
• core charge: Free No Core Charge
• type: Engine Harmonic Balancer
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Dayco Engine Harmonic Balancer
• timing marks: Yes
• overall width: 3.150 In / 80.00 Mm
• hardware included: No
• ring width: 1.319 In / 33.48 Mm
• counterweight balance: Hub Weighted
• outer ring material: Cast Iron
• overall outside diameter: 7.993 In / 203.00 Mm
• nose outside diameter: 2.334 In / 59.27 Mm
• crank bore: 1.601 In / 40.65 Mm

payments cranshafengin:

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

general cranshafengin:

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

returns cranshafengin:

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

offer cranshafengin:

• availability: In Stock
• quantity: 2
• sold: 0
• started: March 10, 2026
• options: Ship-to-home

shipping cranshafengin:

• cost: $0.00
• class: Standard, Expedited
• type: Fixed
• service: Standard, Expedited
• transit: 2-4 Days

seller cranshafengin:

• city: Indianapolis, Indiana
• rating: 99.5%
• # reviews: 630889

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