1. Engine Crankshafts Products
  2. sku: 19025398737207721
  3. POWERBOND DAYCO SX-5070

POWERBOND BY DAYCO SX-5070 Engine Harmonic Balancer Colony Cylinder

fits model: Park. make: Mercury. year: 1987–1991.

Sx-5070 Powerbond By Dayco Engine Harmonic Balancer For 1987-1991 Mercury Colony Park Cylinder Ri

( Brand: Powerbond By Dayco ), ( Manufacturer Part Number: SX-5070 ), ( Item Weight: 10.9800 ), ( Ipn: C207 71-10 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Model: Colony Park ), ( 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: 4.134 In / 105.00 Mm ), ( Hardware Included: No ), ( Ring Width: 1.595 In / 40.49 Mm ), ( Counterweight Balance: Ring Weighted ), ( Outer Ring Material: Steel ), ( Overall Outside Diameter: 6.359 In / 161.50 Mm ), ( Nose Outside Diameter: 1.878 In / 47.70 Mm ), ( Crank Bore: 1.374 In / 34.89 Mm )

Review POWERBOND BY DAYCO Engine Harmonic Balancer Mercury Colony Cylinder Ri fits PARK 1987–1991

The **Powerbond Dayco SX-5070 Engine Harmonic Balancer** is a high-performance, precision-engineered replacement part designed specifically for the 1987 through 1991 Mercury Colony Park cylinder engines, ensuring optimal vibration control and long-term reliability. Crafted from a durable, high-strength steel core, this harmonic balancer is engineered to withstand the demanding forces of high-performance applications while maintaining smooth operation and minimizing engine shake. The SX-5070 features a robust rubber insert that is precision-molded to the exact specifications of the original equipment, providing superior damping capabilities to absorb engine vibrations and reduce torsional stress on critical components like the crankshaft and connecting rods. This balancer is built to meet or exceed OEM standards, offering enhanced durability and longevity compared to standard aftermarket alternatives, making it an ideal choice for both stock and modified engines seeking improved drivability and reduced wear. Whether installed in a daily driver, a performance-oriented vehicle, or a classic restoration project, the Powerbond Dayco SX-5070 delivers the strength and precision needed to keep your Mercury Colony Park engine running smoothly, ensuring a quieter, more stable operation and protecting internal components from excessive strain. Its compatibility with the 1987 1991 model range guarantees a seamless fit, while its robust construction ensures it can handle the rigors of daily use, extended mileage, or even light tuning without compromising performance.

**Pros and Cons of Buying a Powerbond Dayco SX-5070 Engine Harmonic Balancer for a 1987 1991 Mercury Colony Park (Cylinder) Engine**

### **Pros:**

1. **Compatibility** The Powerbond Dayco SX-5070 is specifically designed for the 5.0L (302 cubic inch) Ford HO (High Output) engine, which powers the Mercury Colony Park from 1987 to 1991. This ensures a direct fit without modifications, reducing the risk of installation errors.

2. **Durability and Quality** Powerbond and Dayco are well-regarded brands in the aftermarket automotive parts industry. Their harmonic balancers are often constructed with high-quality materials, including reinforced rubber and steel components, which can improve longevity compared to OEM parts that may wear out prematurely.

3. **Reduced Vibration and Smooth Operation** A worn or failing harmonic balancer can cause excessive vibration, rattling noises, and uneven engine operation. Replacing it with a new SX-5070 can restore smooth power delivery and reduce stress on the engine mounts and drivetrain.

4. **Preventative Maintenance** If the original balancer is cracked, leaking, or showing signs of wear (e.g., oil leaks, visible damage), replacing it proactively can prevent more costly damage, such as damage to the crankshaft pulley or surrounding components.

5. **Ease of Installation** The SX-5070 is designed for straightforward installation, requiring only basic tools (socket set, torque wrench, and possibly a puller if the old balancer is seized). Many mechanics and DIYers find it a manageable repair, especially with the right instructions.

6. **Cost-Effective Upgrade** While the price may be slightly higher than an OEM replacement, the SX-5070 often provides better performance and durability, making it a cost-effective choice in the long run. It may also be more affordable than a full engine rebuild if the balancer failure is causing secondary issues.

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

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### **Cons:**

1. **Higher Upfront Cost** Compared to an OEM replacement part, the SX-5070 may cost more, though the difference is often justified by its quality. Prices can vary depending on the seller (eBay, Amazon, specialty auto parts stores, or direct from the manufacturer).

2. **Potential for Counterfeit Parts** As with many aftermarket parts, there is a risk of purchasing a counterfeit or low-quality knockoff, especially when buying from third-party sellers. Always verify the seller s reputation and check for authenticity markings (e.g., holograms, serial numbers, or manufacturer seals).

3. **Installation Challenges** While generally straightforward, removing a seized harmonic balancer can be difficult, requiring a crankshaft pulley removal tool or a specialized balancer puller. If the engine has been neglected, the bolts may be corroded or stripped, complicating the process.

4. **Limited Lifespan Compared to Some OEM Parts** While the SX-5070 is durable, harmonic balancers are still subject to wear over time, especially in high-performance or heavily modified engines. Under extreme conditions (e.g., aggressive driving, high RPMs, or lack of maintenance), it may not last as long as some OEM parts in less demanding applications.

5. **Compatibility with Modifications** If the engine has been modified (e.g., forced induction, high-performance camshafts, or custom crankshafts), the SX-5070 may not be ideal. Some aftermarket balancers are designed for stock or mild performance builds. In such cases, a performance-specific balancer (e.g., from Clevite or a high-end brand) might be more suitable.

6. **Risk of Over-Torquing** Improper torque on the bolts securing the balancer can lead to stripping or loosening over time. Following the manufacturer s torque specifications (typically around 80 100 ft-lbs) is critical to avoid this issue.

7. **Limited Availability of Parts** If the balancer fails again, finding an exact replacement may be easier with a well-known brand like Powerbond/Dayco, but some specialty or older parts can still be difficult to source compared to more common OEM components.

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### **Conclusion:**

The Powerbond Dayco SX-5070 harmonic balancer is a strong choice for a 1987 1991 Mercury Colony Park with a 5.0L HO engine. Its compatibility, durability, and reputation for quality outweigh the minor drawbacks, such as the higher upfront cost or potential installation challenges. For most owners, this balancer offers a reliable replacement that improves engine smoothness and prevents further damage.

If the original balancer is visibly damaged or leaking, replacing it with the SX-5070 is a practical and cost-effective solution. However, if the engine is heavily modified or subjected to extreme stress, consider consulting with a performance specialist to ensure the balancer is appropriate for your specific setup.

### **Recommendation:**

Purchase the **Powerbond Dayco SX-5070 harmonic balancer** from a reputable seller (preferably the manufacturer s website, a trusted auto parts store, or a well-reviewed online retailer). Verify the part number and compatibility before buying to avoid counterfeit items. If unsure about installation, seek assistance from a mechanic experienced with Ford HO engines. Regularly inspect the balancer for signs of wear, and replace it if it shows cracks, oil leaks, or excessive play. This will help maintain optimal engine performance and longevity.

Details:

Dayco Engine Harmonic Balancer for 1987 - 1991 Mercury Colony Park Cylinder ri: Status: In Stock.

specifications cranshafengin:

  • for models: Park
  • for makes: Mercury
  • for years: 1987-1991
  • brand: Powerbond By Dayco
  • mpn: Sx-5070
  • item weight: 10.9800
  • ipn: C207 71-10
  • placement on vehicle: Engine Cylinder Block
  • compatible model: Colony Park
  • 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: 4.134 In / 105.00 Mm
  • hardware included: No
  • ring width: 1.595 In / 40.49 Mm
  • counterweight balance: Ring Weighted
  • outer ring material: Steel
  • overall outside diameter: 6.359 In / 161.50 Mm
  • nose outside diameter: 1.878 In / 47.70 Mm
  • crank bore: 1.374 In / 34.89 Mm

offer cranshafengin:

  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • quantity: 4
  • started: February 24, 2026

general cranshafengin:

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

shipping cranshafengin:

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

returns cranshafengin:

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

seller cranshafengin:

  • rating: 99.5%
  • # reviews: 625306
  • city: Indianapolis, Indiana

payments cranshafengin:

  • credit card: Discover
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  • wallet: Google-pay
for models: park, for makes: mercury, for years: 1987-1991, item weight: 10.9800, placement on vehicle: engine cylinder block, compatible model: colony park, 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: 4.134 in / 105.00 mm, hardware included: no, ring width: 1.595 in / 40.49 mm, counterweight balance: ring weighted, outer ring material: steel, overall outside diameter: 6.359 in / 161.50 mm, nose outside diameter: 1.878 in / 47.70 mm, crank bore: 1.374 in / 34.89 mm,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19025398737207721,
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