1. Engine Crankshafts Products
  2. sku: 18738822735276721
  3. POWERBOND DAYCO SX-1919

POWERBOND BY DAYCO SX-1919 Engine Harmonic Balancer Townsman 6.6L V8

fits make: Chevrolet. year: 1970–1972.

Sx-1919 Powerbond By Dayco Engine Harmonic Balancer For 1970-1972 Chevrolet Townsman 6.6l V8 Lm

( Brand: Powerbond By Dayco ), ( Manufacturer Part Number: SX-1919 ), ( Item Weight: 10.5100 ), ( Ipn: C259 45-25 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Model: Townsman ), ( 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 Townsman 6.6l V8 Lm fits 1970–1972

The **Powerbond Dayco SX-1919 Engine Harmonic Balancer** is a high-performance, precision-engineered replacement part designed specifically for the **1970 1972 Chevrolet Townsman** equipped with the legendary **6.6L (405 cubic inch) V8 engine**. This balancer is a direct drop-in upgrade that addresses common issues associated with the stock harmonic balancer, including excessive vibration, premature wear, and the dreaded "whining" noise that can plague older big-block Chevy applications. Crafted from **high-strength steel and reinforced with a durable rubber insert**, the SX-1919 is built to withstand the torque and RPM demands of this powerful engine while maintaining smooth operation and longevity. Unlike generic aftermarket alternatives, this balancer features **optimized weight distribution and a balanced design** to minimize torsional vibrations, ensuring a quieter, more refined power delivery especially under heavy loads or at higher speeds. The **Dayco SX series** is renowned for its durability and reliability, making this balancer an ideal choice for both restoration projects and high-mileage vehicles looking to eliminate annoying harmonic issues. Whether you're restoring a classic Townsman to showroom condition or simply maintaining a well-loved muscle car, the Powerbond Dayco SX-1919 provides a seamless fit, enhanced performance, and peace of mind, allowing you to focus on the driving experience rather than persistent mechanical annoyances.

### **Pros and Cons of Buying a Powerbond Dayco SX-1919 Engine Harmonic Balancer for a 1970 1972 Chevrolet Townsman 6.6L V8**

#### **Pros:**

1. **Compatibility and Fitment** The SX-1919 is specifically designed for the 6.6L V8 engine found in the 1970 1972 Chevrolet Townsman, ensuring a proper fit without modification.

2. **Durability and Quality** Powerbond and Dayco are well-regarded manufacturers known for producing high-quality harmonic balancers. These units are typically made with reinforced rubber and steel components, reducing the risk of premature failure.

3. **Reduced Vibration and Smooth Operation** A harmonic balancer dampens engine vibrations, improving drivability and reducing wear on related components like the crankshaft and mounts.

4. **Prevents Cracking and Damage** The 6.6L V8 (also known as the "Big Block" in some contexts) can be prone to harmonic balancer failure over time, leading to cracked casings or rubber separation. Replacing it with an OEM-quality or aftermarket unit prevents costly internal engine damage.

5. **Easier Installation** The SX-1919 is a direct replacement, meaning it should bolt on without requiring machining or alignment adjustments, assuming the crankshaft keyway is intact.

6. **Cost-Effective Maintenance** Replacing a worn harmonic balancer is far cheaper than dealing with the consequences of a failed unit, such as bent rods, cracked blocks, or damaged accessory drives.

7. **Extended Engine Life** By maintaining proper vibration control, the harmonic balancer helps reduce stress on the entire drivetrain, potentially extending the engine s lifespan.

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#### **Cons:**

1. **Potential for Counterfeit or Low-Quality Units** While Powerbond and Dayco are reputable, counterfeit or subpar aftermarket parts can sometimes enter the market. Purchasing from a trusted dealer or verified seller (e.g., RockAuto, Summit Racing, or a local auto parts store with return policies) mitigates this risk.

2. **Installation Difficulty (If DIY)** If the engine has been previously modified or if the balancer is seized, removal and installation may require special tools (e.g., a balancer puller) and mechanical skill. Improper handling could damage the crankshaft keyway or the balancer itself.

3. **Cost Relative to OEM** While still affordable, the SX-1919 may be slightly more expensive than a generic aftermarket balancer. However, the trade-off in quality is usually worth it for a critical component like this.

4. **Limited Availability of OEM Parts** Original equipment balancers for these older Chevy engines are rare and often expensive. The SX-1919 is a reliable alternative, but some buyers may prefer an OEM-style part if available.

5. **Risk of Reinstallation Issues** If the engine mounts or crankshaft alignment is compromised during removal, the new balancer may not function correctly. Ensuring the engine is properly supported and aligned during installation is crucial.

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### **Conclusion:**

The **Powerbond Dayco SX-1919 harmonic balancer** is an excellent choice for a 1970 1972 Chevrolet Townsman with a 6.6L V8 engine. Its compatibility, durability, and role in preventing catastrophic engine damage outweigh the minor drawbacks, such as potential counterfeit risks or installation challenges. For most owners, this is a straightforward and cost-effective upgrade that enhances engine reliability and smoothness.

### **Recommendation:**

- **Purchase from a reputable seller** (e.g., RockAuto, Summit Racing, or a local parts store with return policies) to avoid counterfeit units.

- **Follow proper installation procedures**, including ensuring the crankshaft keyway is intact and the balancer is securely bolted. If unsure, consult a mechanic.

- **Consider replacing related components** (e.g., serpentine belt tensioner, idler pulleys) if they show signs of wear, as they are often replaced during this service.

- **Monitor for leaks or unusual vibrations** after installation. If issues persist, recheck the installation or consult a professional.

For the average owner with a 1970 1972 Townsman, the SX-1919 is a **strong, practical, and recommended choice** for maintaining engine health and performance.

Details:

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

part #: sx1919 prices

  • $69.69-$264.33

specifications cranshafengin:

  • for makes: Chevrolet
  • for years: 1970-1972
  • brand: Powerbond By Dayco
  • mpn: Sx-1919
  • item weight: 10.5100
  • ipn: C259 45-25
  • placement on vehicle: Engine Cylinder Block
  • compatible model: Townsman
  • 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

offer cranshafengin:

  • quantity: 2
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • started: February 8, 2026

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  • rating: 99.5%
  • city: Indianapolis, Indiana
  • # reviews: 620526

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

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  • transit: 4-6 Days
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  • cost: $0.00
  • type: Fixed
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general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
  • condition: New
for makes: chevrolet, for years: 1970-1972, item weight: 10.5100, placement on vehicle: engine cylinder block, compatible model: townsman, 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: 18738822735276721,
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