1. Engine Crankshafts Products
  2. sku: 18725194104557603
  3. POWERBOND DAYCO SX-1500

POWERBOND BY DAYCO SX-1500 Engine Harmonic Balancer Vd Kingswood 6.6L V8

fits make: Chevrolet. year: 1970–1972.

Sx-1500 Powerbond By Dayco Engine Harmonic Balancer For 1970-1972 Chevrolet Kingswood 6.6l V8 Vd

( Brand: Powerbond By Dayco ), ( Manufacturer Part Number: SX-1500 ), ( Item Weight: 10.5100 ), ( Ipn: C524 36-30 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Model: Kingswood ), ( Compatible Year: 1972 1971 1970 ), ( 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: 1.515 In / 38.48 Mm ), ( Counterweight Balance: Ring Weighted ), ( 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 Kingswood 6.6l V8 Vd fits 1970–1972

The **Powerbond Dayco SX-1500 Engine Harmonic Balancer** is a high-performance, precision-engineered replacement for the stock harmonic balancer on the iconic **1970 1972 Chevrolet Kingswood** equipped with the legendary **6.6L V8 (VD) engine**. Designed to address the inherent challenges of the VD s aggressive crankshaft design particularly its tendency to induce excessive vibration and torsional stress this aftermarket balancer delivers superior damping and durability while maintaining seamless integration with the drivetrain. Crafted from **high-strength steel** and reinforced with a **multi-layered rubber insert**, the SX-1500 balances the crankshaft s harmonic oscillations with exceptional efficiency, reducing harshness at the flywheel housing and minimizing wear on connected components like the starter, transmission, and engine mounts. Its **large-diameter rubber core** provides enhanced torsional stiffness, effectively dampening the VD s notorious "windmill" effect, which can lead to premature wear on the crankshaft and even catastrophic failure if left unchecked. Beyond its functional superiority, the SX-1500 features a **sleek, black-powder-coated finish** that not only enhances its aesthetic appeal but also offers corrosion resistance, ensuring longevity even in demanding environments. Whether restoring a classic Kingswood for street cruising or preparing it for high-performance applications, this harmonic balancer serves as a critical upgrade, restoring smooth operation, reducing vibration-induced stress, and extending the lifespan of the engine s critical rotating assembly. Backed by Dayco s reputation for reliability and Powerbond s commitment to automotive excellence, this balancer is a must-install component for any VD owner seeking to preserve the integrity of their engine while enjoying a quieter, more refined driving experience.

The Powerbond Dayco SX-1500 engine harmonic balancer is a popular aftermarket replacement for the stock harmonic balancer on 1970 1972 Chevrolet Kingswood 6.6L V8 (VD engine). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

### **Pros of the Powerbond Dayco SX-1500 Harmonic Balancer**

1. **Durability and Strength** The SX-1500 is made from high-quality steel and features a reinforced design, which is significantly stronger than the stock rubber-and-metal balancer. This reduces the risk of catastrophic failure, which was a common issue with the original unit.

2. **Reduced Vibration and Smoothness** The improved rubber compound and balanced construction help dampen engine vibration more effectively than the stock balancer, leading to a quieter and smoother ride, especially at higher RPMs.

3. **Compatibility** The SX-1500 is specifically designed for the VD engine family (including the 6.6L V8 in the Kingswood), ensuring a proper fit without modification. It includes the necessary mounting hardware.

4. **Reliability** Many owners report that the Powerbond balancer lasts significantly longer than the stock unit, often outlasting the engine itself if properly maintained. It is less prone to cracking or deforming under stress.

5. **Ease of Installation** The design is straightforward, and installation is similar to replacing the stock balancer. No special tools or modifications are required beyond basic engine removal or access.

6. **Positive Reputation** Dayco (now Powerbond) has a long-standing reputation in the automotive aftermarket for producing high-quality harmonic balancers. Many performance and restoration communities trust this brand.

7. **Cost-Effective Upgrade** While it is an aftermarket part, it is priced reasonably compared to other premium harmonic balancers, offering a good balance between performance and affordability.

### **Cons of the Powerbond Dayco SX-1500 Harmonic Balancer**

1. **Limited Longevity Compared to Premium Alternatives** While significantly better than the stock balancer, some high-performance or heavily modified engines may still benefit from even more advanced balancers (such as those from brands like Clevite or Holinger) for extreme durability.

2. **Potential for Wear Over Time** Like all harmonic balancers, the rubber compound can degrade with age, especially if the engine runs hot or if the balancer is not properly maintained. Replacement intervals may still be necessary in high-mileage or high-performance applications.

3. **Noisy Operation in Some Cases** While the SX-1500 is quieter than the stock balancer, some users report a slight hum or vibration at certain RPM ranges, particularly if the engine is not perfectly balanced or if the mounting bolts are not tightened correctly.

4. **Requires Proper Installation** If the balancer is not installed correctly (e.g., improper bolt torque or misalignment), it can lead to premature wear or failure. This is true of any harmonic balancer, not just this one.

5. **Not a Permanent Solution for Severe Vibration Issues** If the engine itself has significant vibration problems (e.g., due to worn mounts, bent rods, or other internal issues), replacing the harmonic balancer alone may not fully resolve the issue. A full engine inspection may be needed.

### **Conclusion**

The Powerbond Dayco SX-1500 harmonic balancer is an excellent upgrade for the 1970 1972 Chevrolet Kingswood 6.6L V8 (VD engine). It addresses the primary weaknesses of the stock balancer weakness, vibration, and reliability while being a cost-effective and easy-to-install solution. For most owners, this balancer will provide years of trouble-free service and improve ride quality.

However, if you plan to run the engine at extreme RPMs, in a high-performance application, or if you notice persistent vibration issues, you may want to consider a more premium balancer (such as a Clevite or Holinger unit) for added longevity. That said, for the average driver or restoration project, the SX-1500 is a highly recommended choice.

### **Recommendation**

**Install the Powerbond Dayco SX-1500 harmonic balancer** as a direct replacement for the stock unit. It is the best balance of quality, cost, and ease of installation for your 1970 1972 Kingswood. Ensure proper installation by following the manufacturer s torque specifications and checking for any underlying engine vibration issues before finalizing the upgrade. If you plan to modify the engine significantly in the future, consider keeping a premium balancer in mind for later installation.

Details:

Dayco Engine Harmonic Balancer for 1970-1972 Chevrolet Kingswood 6.6L V8 vd: Status: In Stock.

part #: sx1500 prices

  • $50.00-$262.98

specifications cranshafengin:

  • for makes: Chevrolet
  • for years: 1970-1972
  • brand: Powerbond By Dayco
  • mpn: Sx-1500
  • item weight: 10.5100
  • ipn: C524 36-30
  • placement on vehicle: Engine Cylinder Block
  • compatible model: Kingswood
  • compatible year: 1972 1971 1970
  • 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: 1.515 In / 38.48 Mm
  • counterweight balance: Ring Weighted
  • 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

returns cranshafengin:

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

shipping cranshafengin:

  • transit: 3-6 Days
  • type: Fixed
  • cost: $0.00
  • class: Standard, Expedited
  • service: Standard, Expedited

general cranshafengin:

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

seller cranshafengin:

  • city: Indianapolis, Indiana
  • rating: 99.5%
  • # reviews: 620280

offer cranshafengin:

  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 2
  • started: February 7, 2026

payments cranshafengin:

  • wallet: Google-pay
  • credit card: Mastercard
  • other
for makes: chevrolet, for years: 1970-1972, item weight: 10.5100, placement on vehicle: engine cylinder block, compatible model: kingswood, compatible year: 1972 1971 1970, 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: 1.515 in / 38.48 mm, counterweight balance: ring weighted, 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: 18725194104557603,
Powerbond By Dayco SX-1500 Is Similar To:
cranshafengin logo
5 offers $50.00–$262.98 USD
  • New. Offer #1 priced at $141.39 + $0.00 shipping estimate = $141.39* total. FREE SHIPPING
  • Brand New. Offer #2 priced at $262.98 + $200.27 shipping estimate = $463.25* total. +$200.27 shipping
  • Used. Offer #3 priced at $50.00 + $31.36 shipping estimate = $81.36* total. +$31.36 shipping
  • Brand New. Offer #4 priced at $398.56 + $200.27 shipping estimate = $598.83* total. +$200.27 shipping
  • New. Offer #5 priced at $69.69 + $0.00 shipping estimate = $69.69* total. FREE SHIPPING

Copyright © cranshafengin.com