CHEVROLET 85S-1212 Big Block Harmonic Balancer

( Brand: Chevrolet ), ( Manufacturer Part Number: 85S-1212 ), ( Part Type: Block Balancer ), ( Manufacturer Warranty: 1 Year ), ( Material: Steel ), ( Finish: Painted ), ( Performance Part: Yes )

Review CHEVROLET Inch Big Block Chevy Harmonic Balancer

Chevrolet 85S-1212 Big Block Harmonic Balancer

The Chevrolet 85S-1212 Big Block Harmonic Balancer is a crucial component of the engine's rotating assembly. This part is specifically designed for Chevrolet Big Block engines, providing a perfect fit and optimal performance.

This harmonic balancer, also known as a vibration damper, is a heavy-duty component engineered to absorb engine harmonics and reduce unwanted vibrations. It is cast from high-strength materials, ensuring durability and reliability even under the most demanding driving conditions. The balancer features a smooth, ribbed design that enhances its ability to distribute engine forces evenly, thereby reducing vibrations and promoting a smoother engine operation.

The 85S-1212 Big Block Harmonic Balancer comes with a pulley, which is essential for driving various engine accessories such as the water pump, alternator, and power steering pump. This pulley is securely bolted to the balancer, ensuring proper alignment and transmission of power. The balancer's diameter is specifically designed to accommodate the necessary size of the drive belts that connect the pulley to these accessories.

Additionally, this harmonic balancer is equipped with a damper, which contains a viscous fluid that absorbs engine harmonics. The damper ensures that the engine runs at a consistent speed, minimizing vibrations and promoting a quieter, more comfortable driving experience.

When it comes to maintenance, the Chevrolet 85S-1212 Big Block Harmonic Balancer is a breeze to install. The balancer is designed with easy-to-access bolt holes that make removal and installation straightforward. Moreover, its ribbed design allows for quick alignment of the engine accessories, saving time and effort during installation.

In summary, the Chevrolet 85S-1212 Big Block Harmonic Balancer is a crucial engine component that helps reduce engine vibrations, absorb harmonics, and ensure optimal performance. Its heavy-duty design, smooth ribbed surface, and integrated pulley make it an essential upgrade for any Chevrolet Big Block engine, delivering a smoother, quieter, and more reliable driving experience.

Buying a Chevrolet 85-1212 big block Harmonic Balancer: Pros and Cons

The Chevrolet 85-1212 big block Harmonic Balancer is a crucial component of a Chevrolet big block engine, responsible for reducing engine vibrations. Replacing a worn-out or damaged balancer can help improve engine performance and prevent potential damage. Here are some pros and cons of buying this specific part.

1. Improved Engine Performance: A new harmonic balancer can help reduce engine vibrations, resulting in improved engine performance.

2. Smoother Idle: A worn-out balancer can cause the engine to run rough, leading to a bumpy ride. A new balancer can help provide a smoother idle and overall driving experience.

3. Prevents Damage: A failing harmonic balancer can cause damage to other engine components, such as the crankshaft or timing gears. Replacing the balancer can help prevent these costly repairs.

4. OEM Part: This balancer is a direct replacement for Chevrolet big block engines, ensuring a proper fit and function.

1. Cost: The Chevrolet 85-1212 big block Harmonic Balancer can be an expensive replacement, especially for those on a tight budget.

2. Labor Costs: Installing the balancer may require professional assistance, adding to the overall cost of the repair.

3. Availability: This specific part may not be readily available at all auto parts stores, requiring a special order.

The Chevrolet 85-1212 big block Harmonic Balancer is an essential component of a Chevrolet big block engine, and replacing it can help improve engine performance, prevent damage, and provide a smoother driving experience. However, the cost of the part and installation may be a significant investment for some. Ultimately, the decision to buy this part depends on the importance placed on engine performance and the budget available for the repair.

If the engine is running rough, experiencing vibrations, or exhibiting other symptoms of a failing harmonic balancer, it is recommended to replace the part as soon as possible to prevent potential damage to other engine components. For those on a tight budget, exploring alternative options, such as used or remanufactured parts, may be worth considering. Additionally, checking with multiple auto parts suppliers for pricing and availability can help ensure the best deal is obtained.

Details:

Used 8 Harmonic Balancer for Big Block Chevy's, - Freshly sand blasted with fresh paint, Came off a Gen V 454 BBC, No issues Chevy's paint BBC.

part #: 85s1212 price

• $60.00

specifications tensionpull:

• for makes: Chevy, Chevrolet
• brand: Chevrolet
• mpn: 85s-1212
• part type: Block Balancer
• manufacturer warranty: 1 Year
• material: Steel
• finish: Painted
• performance part: Yes

payments tensionpull:

• credit card: Visa
• wallet: Apple-pay
• other

general tensionpull:

• Engines Engine Parts > Timing Components Kits > Tensioners Pulleys
• condition: Used

offer tensionpull:

• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: May 2, 2026

returns tensionpull:

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

seller tensionpull:

• # reviews: 140
• rating: 100.0%
• city: Crouse, North Carolina

shipping tensionpull:

• service: USPS Ground Advantage
• transit: 4-9 Days
• cost: $0.00
• carrier: USPS
• type: Calculated
• class: Standard

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