1. Engine Crankshafts Products
  2. sku: 20263268027829603
  3. POWERBOND DAYCO SX-0691

POWERBOND BY DAYCO SX-0691 Engine Harmonic Balancer 5.7L V8

fits model: C2500. make: Chevrolet. year: 1988–1995.

Sx-0691 Powerbond By Dayco Engine Harmonic Balancer For 1988-1995 Chevrolet C2500 5.7l V8 Yr

( Brand: Powerbond By Dayco ), ( Manufacturer Part Number: SX-0691 ), ( Item Weight: 11.1100 ), ( Ipn: C553 56-31 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Year: 1995 1994 1993 1992 1991 1990 1989 1988 ), ( 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: 2.343 In / 59.50 Mm ), ( Hardware Included: No ), ( Ring Width: 1.319 In / 33.48 Mm ), ( Counterweight Balance: Neutral, No Counterweight ), ( Outer Ring Material: Grey Iron ), ( Overall Outside Diameter: 7.993 In / 203.00 Mm ), ( Nose Outside Diameter: 1.763 In / 44.78 Mm ), ( Crank Bore: 1.245 In / 31.60 Mm )

Review POWERBOND BY DAYCO Engine Harmonic Balancer Chevrolet 5.7l V8 Yr fits C2500 1988–1995

The **Powerbond Dayco SX-0691 Engine Harmonic Balancer** is a premium, high-performance replacement part meticulously engineered to restore optimal vibration damping and smooth operation to the **1988 1995 Chevrolet C2500** equipped with the legendary **5.7L (350 cubic inch) V8 engine**. Designed to address the inherent challenges of high-performance and heavy-duty applications, this harmonic balancer combines cutting-edge rubber technology with a robust steel core to deliver superior durability, precision balancing, and reduced engine noise critical for maintaining both drivability and longevity in this iconic truck.

Crafted from **high-grade, oil-resistant rubber compounds**, the SX-0691 is formulated to withstand extreme temperatures, constant vibration, and the demanding stresses of towing, hauling, or high-RPM driving, which are common in the C2500 s rugged workloads. The **precision-machined steel core** ensures minimal runout and concentricity, preventing excessive wear on the crankshaft and associated components while enhancing overall engine smoothness. Unlike generic aftermarket alternatives, this balancer is **OEM-toleranced** to fit seamlessly with the original crankshaft pulley interface, reducing the risk of misalignment and ensuring a secure, vibration-free connection.

For truck owners seeking to eliminate the telltale hum and shudder associated with worn harmonic balancers often exacerbated by heavy loads or aggressive driving the SX-0691 offers a **long-lasting, reliable solution**. Its robust construction minimizes the risk of rubber degradation or cracking, even under prolonged exposure to heat and stress, making it an ideal choice for both daily drivers and performance enthusiasts. Additionally, the **easy installation** requiring only basic tools and minimal disassembly ensures a straightforward upgrade that can be completed in a single afternoon, saving time and hassle compared to more complex engine modifications.

Whether restoring stock performance, preparing for a heavy-duty towing application, or simply addressing a persistent vibration issue, the **Powerbond Dayco SX-0691** delivers the performance and durability expected from a trusted brand. Built to exceed factory specifications, this harmonic balancer is a **cost-effective investment** that helps preserve the integrity of the 5.7L V8 s drivetrain, extending its lifespan and ensuring a quieter, more responsive ride for years to come.

### Pros and Cons of buying a Powerbond Dayco SX-0691 Engine Harmonic Balancer for a 1988-1995 Chevrolet C2500 5.7L V8

#### **Pros:**

The Powerbond Dayco SX-0691 harmonic balancer is a well-regarded aftermarket replacement part for the 5.7L V8 engines found in the 1988-1995 Chevrolet C2500 trucks. Here are the key advantages:

1. **Compatibility and Fitment** This part is specifically designed for the 5.7L V8 engines in your truck, ensuring a proper fit without modifications. It replaces the stock harmonic balancer, which can wear out over time, leading to vibrations, rattles, or even catastrophic failure.

2. **Durability and Quality** Powerbond and Dayco are reputable brands known for manufacturing high-quality engine components. The SX-0691 is made with durable materials, including a reinforced rubber or polyurethane core and a steel outer shell, which should last significantly longer than the stock balancer.

3. **Reduced Vibrations** A worn harmonic balancer can cause excessive vibrations, especially at higher RPMs. The new balancer dampens these vibrations, improving smoothness and reducing wear on connected components like the crankshaft and engine mounts.

4. **Prevents Damage to Other Components** If the harmonic balancer fails completely, it can cause severe damage to the crankshaft pulley, timing belt, or even the engine block due to the sudden release of stored rotational energy. Replacing it proactively avoids costly repairs.

5. **Ease of Installation** The SX-0691 is designed for straightforward installation. It typically requires removing the serpentine belt, disconnecting the crankshaft pulley bolts, and replacing the old balancer with the new one. No major disassembly is needed unless other components (like the belt tensioner or idlers) are also being serviced.

6. **Cost-Effective Solution** Replacing the harmonic balancer is a relatively inexpensive repair compared to the potential damage caused by a failed balancer. The cost is a fraction of what you might spend on a cracked crankshaft or damaged timing components.

7. **Warranty Coverage** Both Powerbond and Dayco offer warranties on their harmonic balancers, providing peace of mind against premature failure due to defects in materials or workmanship.

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#### **Cons:** While the Powerbond Dayco SX-0691 is a solid choice, there are a few potential drawbacks to consider:

1. **Limited Lifespan Compared to Some High-End Parts** While the SX-0691 is durable, it may not last as long as premium aftermarket or OEM-grade balancers in extreme conditions (e.g., high-performance applications, heavy-duty towing, or extreme heat). The rubber or polyurethane core can degrade over time, especially if the engine runs hot or is subjected to frequent high-stress conditions.

2. **Potential for Vibration Issues in Some Engines** In rare cases, aftermarket harmonic balancers may not dampen vibrations as effectively as the stock unit, particularly if the engine has been modified or if the balancer is not perfectly balanced. This is more likely if the balancer is not installed correctly or if the engine has other underlying issues (e.g., worn crankshaft bearings).

3. **Installation Challenges for DIYers** While the installation is generally straightforward, some users may find it tricky if they lack experience with engine work. Misalignment or improper torque on the crankshaft pulley bolts can lead to vibrations or premature failure. Using a torque wrench and following the manufacturer s specifications is critical.

4. **Compatibility with Aftermarket Mods** If your truck has been modified with a performance camshaft, turbocharger, or other high-stress components, the stock or aftermarket harmonic balancer may not be sufficient. In such cases, a heavier-duty balancer (e.g., a forged steel or high-performance unit) might be more appropriate.

5. **Quality Variability** While Powerbond and Dayco are generally reliable, there have been occasional reports of counterfeit or low-quality units entering the market. Purchasing from a reputable dealer or directly from the manufacturer s website can help mitigate this risk.

6. **Noisy Operation in Some Cases** Some users report that the new balancer can be slightly noisier than the stock unit, particularly at idle or low RPMs. This is usually due to the balancer s design and is not necessarily a sign of failure, but it can be noticeable to some drivers.

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### **Conclusion:**

The Powerbond Dayco SX-0691 harmonic balancer is an excellent choice for replacing the stock unit in your 1988-1995 Chevrolet C2500 5.7L V8. It offers a balance of quality, durability, and affordability, making it a practical solution for reducing vibrations and preventing potential engine damage. The pros far outweigh the cons for most applications, especially for daily driving, light towing, or general use.

However, if your truck is used for heavy-duty towing, high-performance driving, or has been extensively modified, you may want to consider a heavier-duty balancer or consult with a mechanic to ensure the best fit for your specific needs. Always purchase from a trusted source to avoid counterfeit parts, and follow proper installation procedures to maximize longevity.

### **Recommendation:**

For the average owner of a 1988-1995 Chevrolet C2500 with a 5.7L V8, the **Powerbond Dayco SX-0691 harmonic balancer is highly recommended**. It is a reliable, cost-effective replacement that will improve engine smoothness and reduce the risk of catastrophic failure. If you are comfortable with basic engine maintenance, installing it yourself is a manageable DIY project. If you are unsure about the installation process, consulting a mechanic to perform the replacement is a wise investment to ensure it is done correctly.

If your truck sees heavy use or has been modified, consider upgrading to a more robust balancer, but the SX-0691 remains a solid starting point for most owners. Always pair this replacement with a thorough inspection of the serpentine belt, tensioner, and idlers to ensure the entire drivetrain is in good condition.

Details:

Dayco Engine Harmonic Balancer for 1988 - 1995 Chevrolet C2500 5.7L V8 yr: Status: In Stock.

specifications cranshafengin:

  • for models: C2500
  • for makes: Chevrolet
  • for years: 1988-1995
  • brand: Powerbond By Dayco
  • mpn: Sx-0691
  • item weight: 11.1100
  • ipn: C553 56-31
  • placement on vehicle: Engine Cylinder Block
  • compatible year: 1995 1994 1993 1992 1991 1990 1989 1988
  • 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: 2.343 In / 59.50 Mm
  • hardware included: No
  • ring width: 1.319 In / 33.48 Mm
  • counterweight balance: Neutral, No Counterweight
  • outer ring material: Grey Iron
  • overall outside diameter: 7.993 In / 203.00 Mm
  • nose outside diameter: 1.763 In / 44.78 Mm
  • crank bore: 1.245 In / 31.60 Mm

general cranshafengin:

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

payments cranshafengin:

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shipping cranshafengin:

  • service: Standard, Expedited
  • type: Fixed
  • class: Standard, Expedited
  • cost: $0.00
  • transit: 4-7 Days

offer cranshafengin:

  • quantity: 2
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • started: May 9, 2026

returns cranshafengin:

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

seller cranshafengin:

  • rating: 99.6%
  • city: Indianapolis, Indiana
  • # reviews: 655098
for models: c2500, for makes: chevrolet, for years: 1988-1995, item weight: 11.1100, placement on vehicle: engine cylinder block, compatible year: 1995 1994 1993 1992 1991 1990 1989 1988, 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: 2.343 in / 59.50 mm, hardware included: no, ring width: 1.319 in / 33.48 mm, counterweight balance: neutral, no counterweight, outer ring material: grey iron, overall outside diameter: 7.993 in / 203.00 mm, nose outside diameter: 1.763 in / 44.78 mm, crank bore: 1.245 in / 31.60 mm,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 20263268027829603,
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