1. Engine Crankshafts Products
  2. sku: 19255217850418603
  3. POWERBOND DAYCO SX-3504

POWERBOND BY DAYCO SX-3504 Engine Harmonic Balancer Mn 6.2L V8

fits model: C1500, Suburban. make: Gmc. year: 1982–1986.

Sx-3504 Powerbond By Dayco Engine Harmonic Balancer For 1982-1986 Gmc C1500 Suburban 6.2l V8 Mn

( Brand: Powerbond By Dayco ), ( Manufacturer Part Number: SX-3504 ), ( Item Weight: 12.5700 ), ( Ipn: C308 11-64 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Model: C1500 Suburban ), ( Compatible Year: 1986 1985 1984 1983 1982 ), ( 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 6.2l V8 Mn fits SUBURBAN C1500 1982–1986

The **Powerbond Dayco SX-3504 Engine Harmonic Balancer** is a premium, high-performance replacement part designed specifically for the **1982 1986 GMC C1500 Suburban** equipped with the legendary **6.2L V8 engine**, originally produced under the **Oldsmobile Rocket V8** designation (also known as the **M23** or **M23E** engine in some configurations). This harmonic balancer is engineered to restore smooth operation, eliminate excessive vibration, and enhance overall drivability in your classic or restored vehicle, ensuring it runs with the same refined power and reliability it was built for.

Crafted from **high-strength, precision-machined steel**, the Powerbond SX-3504 harmonic balancer features a **rubberized elastomer insert** that is formulated to withstand the demanding torque and RPM ranges of the 6.2L V8, providing superior damping and vibration suppression. Unlike generic or aftermarket alternatives, this balancer is **directly compatible** with the crankshaft pulley interface of your GMC Suburban, ensuring a perfect fit without the need for additional spacers or modifications. Its **robust construction** minimizes flex and torsional vibration, which is critical for maintaining smooth power delivery especially under heavy loads or during spirited driving.

One of the standout features of the Powerbond SX-3504 is its **durability and longevity**, thanks to the **high-quality rubber compound** used in its core. This material is resistant to cracking, hardening, and premature wear, even in extreme temperature conditions, making it ideal for both daily driving and high-performance applications. The balancer is also **easily installable**, requiring only basic tools and a bit of patience no special equipment is needed, and it can be fitted during routine maintenance or as part of a more extensive engine rebuild.

For enthusiasts who appreciate the **authentic performance** of their classic GMC Suburban, the Powerbond harmonic balancer is an excellent choice to complement other high-quality upgrades, such as performance camshafts, intake manifolds, or exhaust systems. By restoring the original vibration characteristics of the 6.2L V8, this balancer helps preserve the engine s **smooth, linear power curve**, ensuring that every rev and acceleration feels as refined as it did when the vehicle was new. Whether you re restoring a daily driver, a weekend cruiser, or a showpiece, the Powerbond SX-3504 harmonic balancer is a **reliable, high-performance solution** that delivers both function and fitment precision.

The Powerbond Dayco SX-3504 engine harmonic balancer is a popular aftermarket replacement for the stock harmonic balancer on 1982 1986 GMC C1500 Suburban trucks equipped with the 6.2L V8 (also known as the Oldsmobile 350 or "Rocket V8"). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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**Pros:**

1. **Improved Durability and Longevity** The Powerbond/Dayco SX-3504 is designed with a heavier-duty rubber compound and reinforced construction compared to the stock balancer. This reduces the risk of cracking, splitting, or premature failure, which is a common issue with the original harmonic balancer on these engines. 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 Smoothness** The upgraded rubber compound and design help dampen engine vibrations more effectively than the stock balancer, contributing to a smoother driveline feel. This is particularly noticeable in vehicles with high-performance modifications or heavy loads, where the stock balancer may struggle to handle the increased stress.

3. **Compatibility and Fit** The SX-3504 is specifically engineered as a direct replacement for the 6.2L V8 harmonic balancer, ensuring an exact fit without requiring modifications. It is widely available and commonly used in the aftermarket, which means parts and installation guidance are readily accessible.

4. **Cost-Effective Upgrade** While not the cheapest balancer on the market, the Powerbond/Dayco SX-3504 offers a balance between price and performance. It is generally more affordable than premium brands like Clevite or Koyo while still providing noticeable improvements over the stock part. Prices typically range between $50 and $80, depending on the retailer.

5. **Positive User Feedback** Many owners of 1982 1986 GMC Suburans with the 6.2L V8 report satisfaction with the SX-3504, citing reduced rattles, fewer vibration complaints, and longer service life compared to the OEM balancer. Online forums and reviews often highlight its reliability, especially for daily drivers and light-duty applications.

6. **Easy Installation** The balancer is designed for straightforward installation, requiring only basic tools. Most mechanics or experienced DIYers can replace it in under an hour, especially if the engine is already warmed up for other maintenance tasks (e.g., timing belt or water pump replacement).

7. **Warranty Coverage** Powerbond and Dayco typically offer warranties on their harmonic balancers, which can provide peace of mind in case of premature failure. The exact warranty terms may vary, but they often cover defects in materials and workmanship for a period of 12 24 months.

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**Cons:**

1. **Not a Permanent Fix for All Vibration Issues** While the SX-3504 improves vibration dampening, it is not a cure-all for driveline or suspension-related rattles. If your vehicle has worn-out driveshaft yokes, U-joints, or other components, these issues may persist or worsen after replacing the harmonic balancer. A thorough inspection of the entire driveline is recommended before attributing vibration problems solely to the balancer.

2. **Limited Performance for High-Performance Applications** For heavily modified engines (e.g., forced induction, high RPM tuning, or significant power increases), the SX-3504 may still struggle to handle the extreme stresses placed on the balancer. In such cases, aftermarket brands like Clevite or Koyo, which use more advanced materials (e.g., steel-reinforced rubber or composite designs), may be more appropriate.

3. **Potential for Overheating or Degradation** Like all rubber components, the harmonic balancer can degrade over time if exposed to excessive heat, oil contamination, or improper installation (e.g., overtightening). While the SX-3504 is more durable than the stock part, it is not immune to failure, especially in high-heat environments or with poor maintenance practices.

4. **Quality Variability** As with many aftermarket parts, the quality of the SX-3504 can vary depending on the retailer or batch. Counterfeit or low-quality knockoffs may lack the durability of the genuine Powerbond/Dayco product. Purchasing from reputable suppliers (e.g., RockAuto, Summit Racing, or authorized dealers) helps mitigate this risk.

5. **Requires Professional Installation for Optimal Results** While the balancer is easy to install, improper handling (e.g., overtightening the bolt, misalignment, or using the wrong torque specification) can lead to premature failure or damage to the crankshaft pulley. Some owners opt to have it installed by a professional to ensure proper fitment and torque settings.

6. **Not a Sound Deadening Solution** The harmonic balancer primarily addresses vibration dampening, not engine or exhaust noise. If your vehicle has excessive engine noise (e.g., rattling valves, exhaust leaks, or intake issues), replacing the balancer will not resolve those problems.

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**Conclusion:**

The Powerbond Dayco SX-3504 harmonic balancer is a solid, cost-effective upgrade for the 1982 1986 GMC C1500 Suburban s 6.2L V8. It addresses the most common issues with the stock balancer cracking, splitting, and vibration while offering a noticeable improvement in driveline smoothness. For daily drivers, light-duty applications, and vehicles with stock or mildly modified engines, this balancer is an excellent choice. However, it is not a universal fix for all vibration or noise issues, and owners should ensure the rest of the driveline is in good condition before installation.

If your vehicle experiences excessive vibration, rattles, or if the stock balancer has already failed, the SX-3504 is a reliable and well-regarded replacement. For high-performance or heavily modified engines, consider exploring premium brands like Clevite or Koyo for enhanced durability.

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**Recommendation:**

For the 1982 1986 GMC C1500 Suburban with a 6.2L V8, I recommend the Powerbond Dayco SX-3504 harmonic balancer as a practical and effective upgrade. Purchase it from a trusted retailer to avoid counterfeit products, and ensure the rest of the driveline (driveshafts, U-joints, etc.) is inspected for wear. If you are planning significant engine modifications or notice persistent vibration issues beyond the balancer s scope, consult with a mechanic to address those concerns concurrently.

Installation should be done carefully, following the manufacturer s torque specifications (typically around 80 100 ft-lbs for the crankshaft bolt). If you are uncomfortable with the process, have a professional perform the replacement. With proper installation and maintenance, the SX-3504 will likely outlast the stock balancer and provide a smoother, quieter ride.

Details:

Dayco Engine Harmonic Balancer for 1982 - 1986 GMC C1500 Suburban 6.2L V8 mn: Status: In Stock.

part #: sx3504 price

  • $202.70

specifications cranshafengin:

  • for models: C1500, Suburban
  • for makes: Gmc
  • for years: 1982-1986
  • brand: Powerbond By Dayco
  • mpn: Sx-3504
  • item weight: 12.5700
  • ipn: C308 11-64
  • placement on vehicle: Engine Cylinder Block
  • compatible model: C1500 Suburban
  • compatible year: 1986 1985 1984 1983 1982
  • 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

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  • quantity: 2
  • started: March 10, 2026
  • availability: In Stock

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for models: c1500, suburban, for makes: gmc, for years: 1982-1986, item weight: 12.5700, placement on vehicle: engine cylinder block, compatible model: c1500 suburban, compatible year: 1986 1985 1984 1983 1982, 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,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19255217850418603,
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