DORMAN OE SOLUTIONS SX-8746 Engine Harmonic Balancer Gj 7.4L V8 Cylinder

( Brand: Dorman Oe Solutions ), ( Manufacturer Part Number: SX-8746 ), ( Manufacturer Warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part ), ( Item Weight: 15.9100 ), ( Ipn: C152 80-47 ), ( Placement On Vehicle: Engine Cylinder Block ), ( Compatible Year: 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 ), ( Core Charge: Free No Core Charge ), ( Type: Engine Harmonic Balancer ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Dorman Engine Harmonic Balancer )

Review DORMAN OE SOLUTIONS Engine Harmonic Balancer Chevrolet 7.4l V8 Cylinder Gj fits C20 1975–1986

The **Dorman SX-8746 Engine Harmonic Balancer** is a precision-engineered replacement part designed specifically for the robust **1975 1986 Chevrolet C20** pickup trucks equipped with the legendary **7.4L (454 cubic inch) V8 engine**, featuring the iconic **GJ block**. This heavy-duty harmonic balancer is meticulously crafted to restore optimal vibration dampening, ensuring smooth operation and longevity for your high-performance or daily-drive vehicle. Engineered from high-quality materials, including a reinforced steel core and a durable rubber insert, the Dorman SX-8746 is built to withstand the relentless torque and RPM demands of this powerful V8, reducing harmful engine vibrations that can lead to premature wear on critical components like the crankshaft, timing belt, and drivetrain. Its precise fitment ensures seamless installation, aligning perfectly with the crankshaft pulley and flywheel housing of the GJ engine, while its robust construction minimizes flex and resonance, enhancing both drivability and engine protection. Whether you're restoring a classic muscle truck, upgrading a workhorse, or maintaining a well-loved classic, this harmonic balancer delivers the reliability and performance you expect from Dorman a brand synonymous with quality and compatibility. With its straightforward bolt-on installation and long-lasting durability, the SX-8746 is an essential component for preserving the integrity of your 7.4L V8, ensuring it runs as smoothly as the day it left the factory.

### **Pros and Cons of Buying a Dorman SX-8746 Engine Harmonic Balancer for a 1975 1986 Chevrolet C20 7.4L V8 (GJ Series)**

1. **Direct Fitment** The Dorman SX-8746 is specifically designed for the GM 7.4L V8 (GJ series), ensuring compatibility with your 1975 1986 Chevrolet C20 without modifications.

2. **High-Quality Construction** Dorman is a trusted brand known for durable, precision-engineered parts. The harmonic balancer is made from high-strength steel and features a rubber insert for vibration dampening.

3. **Reliability** A properly functioning harmonic balancer prevents excessive engine vibration, reducing strain on the crankshaft and related components, which can extend engine life.

4. **Easy Installation** The part is designed for straightforward replacement, requiring only basic tools. No major disassembly is needed beyond removing the timing cover and old balancer.

5. **Cost-Effective Solution** Replacing a worn harmonic balancer is significantly cheaper than dealing with potential engine damage caused by excessive vibration (e.g., cracked crankshaft, bent rods, or timing issues).

6. **Prevents Further Damage** A failing harmonic balancer can lead to catastrophic engine failure if the rubber insert cracks or the steel shell fractures, sending debris into the engine. Replacing it proactively avoids costly repairs.

7. **Warranty Coverage** Dorman parts often come with a warranty (typically 1 2 years), providing peace of mind against premature failure.

---

1. **Labor Costs** While the part itself is reasonably priced, labor to replace it can be time-consuming, especially if the engine bay is tight or if other components (e.g., timing belt, water pump) need attention during the process.

2. **Potential for Counterfeit Parts** Some aftermarket parts, including harmonic balancers, may be counterfeit or low-quality knockoffs. Purchasing from a reputable dealer (e.g., RockAuto, Summit Racing, or a local auto parts store with return policies) mitigates this risk.

3. **Rubber Insert Wear** Over time, the rubber insert in the harmonic balancer can dry out or crack, even if the steel shell remains intact. This may require replacement sooner than expected, depending on driving conditions (e.g., extreme heat, off-roading).

4. **Limited Lifespan** While a harmonic balancer can last the life of the engine, it is not a "forever" part. In high-mileage or heavily used engines, it may need replacement every 100,000 150,000 miles.

5. **Misalignment Risk** If not installed correctly, the balancer can cause vibration issues or even damage the crankshaft pulley or timing components. Proper alignment with the crankshaft is critical.

6. **Compatibility with Modifications** If your engine has been modified (e.g., forced induction, high-performance camshafts), the stock harmonic balancer may not handle the increased stress. In such cases, a performance balancer (e.g., from Clevite or a specialist like **Crankshaft Technologies**) may be warranted.

---

The **Dorman SX-8746 harmonic balancer** is a **reliable, cost-effective, and direct-fit solution** for your 1975 1986 Chevrolet C20 7.4L V8. It addresses a common wear item that, if neglected, can lead to severe engine damage. The pros far outweigh the cons, especially for stock or lightly modified engines. However, if your vehicle is heavily modified or used in extreme conditions, consider a higher-quality or performance-oriented balancer.

- **Buy the Dorman SX-8746** if you need a **budget-friendly, stock-fit replacement** and your engine is not heavily modified.

- **Verify the part number** when purchasing to avoid counterfeit items look for a **Dorman-branded package** or a seller with a good return policy.

- **Replace it as part of a routine maintenance check** (e.g., during a timing belt or water pump replacement) to avoid unexpected failures.

- **If your engine is modified or high-performance**, research a **performance harmonic balancer** (e.g., Clevite or aftermarket high-torque models) to ensure it can handle increased stress.

- **Follow installation instructions carefully** to ensure proper alignment and torque specifications.

For most owners of a stock or mildly modified 7.4L V8, the Dorman part is a **smart, practical choice** that will prevent costly repairs down the road.

Details:

Dorman Engine Harmonic Balancer for 1975 1986 Chevrolet C20 7.4L V8 Cylinder gj: Status: In Stock.

part #: sx8746 prices

• $14.45-$112.65

specifications cranshafengin:

• for models: C20
• for makes: Chevrolet
• for years: 1975-1986
• brand: Dorman Oe Solutions
• mpn: Sx-8746
• manufacturer warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part
• item weight: 15.9100
• ipn: C152 80-47
• placement on vehicle: Engine Cylinder Block
• compatible year: 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975
• core charge: Free No Core Charge
• type: Engine Harmonic Balancer
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Dorman Engine Harmonic Balancer

payments cranshafengin:

• wallet: Paypal
• credit card: Discover
• other

shipping cranshafengin:

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

seller cranshafengin:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 638196

returns cranshafengin:

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

offer cranshafengin:

• quantity: 2
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: March 27, 2026

general cranshafengin:

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

Dorman Oe Solutions SX-8746 Is Similar To:

• 0019495149439 0019495149439 Dorman 594-113s Harmonic Balancer (31.9% similar) The ductile steel construction allows for improved tensile and impact strength, safeguarding engine maintaining fuel efficiency year after. Dorman harmonic balances undergo detailed dimensional checks of the full assembly and critical components to ensure strength integrity part. Search by year. ...(February 10th, 2017)
• 0019495149484 0019495149484 Dorman 594-081s Harmonic Balancer (31.9% similar) Search by make. The ductile steel construction allows for improved tensile and impact strength, safeguarding engine maintaining fuel efficiency year after. Search by year. Search by model...(February 10th, 2017)
• 0019495250999 0019495250999 Dorman 594309 Harmonic Balancer (32.3% similar) Search by year. Search by model. Search by make...(February 9th, 2017)
• 0019495489443 0019495489443 Dorman 594-355 Harmonic Balancer (32.1% similar) Dorman harmonic balances undergo detailed dimensional checks of the full assembly and critical components to ensure strength integrity part. Search by year. Search by make. Search by model...(January 18th, 2017)
• 054 01001 602 Wd Express Dorman Engine Crankshaft Pulley Fits Honda Odyssey Accord (28.3% similar) Price is for 1 - adjust quantity in cart...(July 6th, 2018)
• 054 21017 602 Wd Express Dorman Engine Crankshaft Pulley Fits Honda Civic Del (24.6% similar) All products are covered by manufacturers warranty. Listing data is catalog provider. 24X7 online...(July 26th, 2018)
• 054 21018 602 Wd Express Dorman Engine Crankshaft Pulley Fits Honda (29.6% similar) 24X7 online. Listing data is catalog provider. All products are covered by manufacturers warranty...(July 26th, 2018)
• 054 21019 602 Wd Express Dorman Engine Crankshaft Pulley Fits Honda Accord (29.5% similar) Listing data is catalog provider. 24X7 online. All products are covered by manufacturers warranty...(September 13th, 2018)
• 054 38001 602 Wd Express Dorman Engine Crankshaft Pulley Fits Nissan Frontier Xterra (24.7% similar) All products are covered by manufacturers warranty. 24X7 online. Listing data is catalog provider...(July 26th, 2018)
• 054 38005 602 Wd Express Dorman Engine Crankshaft Pulley Fits Nissan Altima (27.1% similar) All products are covered by manufacturers warranty. 24X7 online. Listing data is catalog provider...(July 26th, 2018)
• 054 38006 602 Wd Express Dorman Engine Crankshaft Pulley Fits Nissan Quest Maxima (26.2% similar) 24X7 online. This part fits vehicles made in the following years 2003 , 2004 , 2005 , 2006 , 2007 , 2008 , listing data is catalog provider. All products are covered by manufacturers warranty...(July 26th, 2018)