1. Engine Crankshafts Products
  2. sku: 20036756720588793
  3. COMETIC C5980-70

COMETIC C5980-70 Ati Ring Balancer Viton Oring Rebuild Kit 918980-70

918980-70 Cometic C5980-70 New Ati 6 Inch 3 Ring Balancer Viton Oring Rebuild Kit

( Brand: Cometic ), ( Manufacturer Part Number: C5980-70 ), ( Part Type: Ring Balancer ), ( Core Charges: This Product Has No Core Charge. ), ( Manufacturer Warranty: Unspecified Length ), ( Country Of Origin: United States )

Review COMETIC New Ati Inch Ring Balancer Viton Oring Rebuild Kit

The **Cosmetic C5980-70 ATI Ring Balancer 918980-70 Viton O-Ring Rebuild Kit** is a meticulously engineered aftermarket solution designed to restore peak performance and longevity to the original ATI (Automatic Transmission Interlock) ring balancer assembly found in select Ford vehicles, particularly those equipped with the 4R75E, 4R70W, or 4R100 automatic transmissions. This high-quality rebuild kit is crafted to address common wear issues associated with the balancer s O-ring seals, which are critical for maintaining proper hydraulic pressure and preventing fluid leaks that can compromise shifting efficiency and transmission health. The kit features a **Viton O-ring**, a synthetic elastomer renowned for its superior resistance to heat, oil, and chemical degradation, ensuring reliable sealing under the demanding conditions of a high-performance transmission. Beyond the O-ring, the rebuild kit includes precision-machined components such as the balancer s internal piston, springs, and snap rings, all of which are designed to fit seamlessly with the original balancer housing, minimizing clearance gaps and reducing the risk of premature failure. Whether addressing symptoms like delayed shifts, erratic clutch engagement, or fluid leaks often signaled by a noticeable drop in transmission fluid or a whining noise during operation this kit provides a cost-effective alternative to a full balancer replacement. Ideal for mechanics and DIY enthusiasts alike, the Cosmetic rebuild kit simplifies the rebuild process with clear instructions and compatible parts, allowing for a straightforward yet thorough restoration of the balancer s functionality. By upgrading to Viton O-rings and ensuring all internal components are in optimal condition, this kit not only extends the life of the transmission but also enhances overall drivability, making it an indispensable upgrade for those seeking to maintain or revive the performance of their Ford vehicle s automatic transmission.

The **Cosmetic C5980-70 ATI Ring Balancer (918980-70 with Viton O-ring Rebuild Kit)** is a popular aftermarket upgrade for the **C5980** (and compatible models like the **C5981** and **C5982**) to improve performance and longevity. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the ATI Ring Balancer Kit**

1. **Improved Engine Performance**

The ATI ring balancer kit replaces the stock piston rings with **low-friction, high-quality aftermarket rings** designed to reduce compression leaks and improve sealing. This leads to better compression, smoother power delivery, and improved throttle response, especially noticeable in older or worn engines.

2. **Extended Engine Life**

Stock piston rings on the C5980 are known to wear out over time, leading to oil consumption, reduced compression, and potential engine damage. The ATI rings are made from **high-quality materials** (often **cast iron or chrome-plated steel**) that resist wear better than OEM rings, helping the engine last longer before requiring a full rebuild.

3. **Reduced Oil Consumption**

One of the most common issues with the C5980 is **oil burning** due to worn piston rings. The ATI kit includes **oil control rings** that help minimize oil leakage into the combustion chamber, reducing oil consumption and smoke from the exhaust.

4. **Better Fuel Efficiency**

With improved compression and reduced internal friction, the engine runs more efficiently, leading to **slightly better fuel economy** compared to a worn-out stock setup.

5. **Easier Installation (Compared to Full Rebuild)**

While a full engine rebuild is a major undertaking, replacing just the piston rings is a **less invasive procedure** that can be done by a skilled mechanic or even a DIYer with proper tools. The ATI kit comes with **clear instructions and often includes gaskets, seals, and o-rings** to simplify the process.

6. **Compatibility with Modifications**

If you ve already modified your C5980 (e.g., **turbocharging, forced induction, or high-performance tuning**), the ATI rings are a **cost-effective way to support the engine** without requiring a full rebuild. They work well under increased stress.

7. **Warranty on Aftermarket Parts**

Many reputable sellers (like **ATI, Cosmetic, or eBay trusted shops**) offer **warranties on their piston ring kits**, providing some peace of mind against premature failure.

8. **Cost-Effective Upgrade**

Compared to a full engine rebuild (which can cost **$3,000 $6,000 **), the ATI ring balancer kit is a **relatively inexpensive upgrade** (typically **$200 $400** for the full kit). It s a **proactive maintenance step** that can prevent costly engine damage later.

9. **Viton O-Ring Advantage**

The inclusion of a **Viton O-ring** (instead of a standard nitrile) ensures better sealing against **high temperatures and fuel additives**, reducing the risk of leaks and improving reliability in long-term use.

10. **Positive Community Feedback**

Many **C5980 owners** report noticeable improvements in power, reliability, and longevity after installing the ATI kit. Online forums (e.g., **Honda forums, Turbo Forums, or C5980-specific groups**) frequently highlight success stories with this upgrade.

---

### **Cons of the ATI Ring Balancer Kit**

1. **Not a Cure for Major Engine Issues**

If the engine has **severe internal damage** (e.g., **scored cylinders, bent rods, or cracked pistons**), replacing just the rings will **not fix the underlying problem**. A **full engine rebuild or replacement** may still be necessary.

2. **Requires Professional Installation (Recommended)**

While the installation is **less complex than a full rebuild**, it still requires **precision and experience** to avoid mistakes like:

- **Incorrect ring gap settings** (too tight or too loose can cause performance issues or damage).

- **Improper torque specs** on bolts or gaskets (leading to leaks or warping).

- **Contamination** from old carbon buildup or debris during installation.

A **mechanic with Honda experience** is strongly recommended to ensure proper installation.

3. **Potential for Increased Oil Consumption (Temporarily)**

After installation, some users report a **brief increase in oil consumption** as the new rings **bed in** (usually lasts **50 100 hours**). This is normal and should stabilize afterward.

4. **Limited Longevity Compared to a Full Rebuild**

While the ATI rings are **better than stock**, they are not **indestructible**. In a **high-mileage or heavily modified engine**, they may still wear out over **50,000 100,000 miles**, requiring eventual replacement or a full rebuild.

5. **Not a Power Increase (Just Efficiency Gains)**

Unlike **turbocharging or forced induction**, the ATI kit does **not add horsepower** it simply **restores efficiency and reduces losses** from worn rings. If you're looking for **big power gains**, other mods (e.g., **turbo, supercharger, or cylinder heads**) will be more effective.

6. **Risk of Voiding Warranty (If Applicable)**

If your C5980 is **still under manufacturer warranty**, installing aftermarket piston rings **may void the warranty** on the engine block or cylinder head. Check your warranty terms before proceeding.

7. **Additional Costs May Arise**

Beyond the cost of the kit, you may need to budget for:

- **Labor costs** (if not doing it yourself).

- **Replacement of other worn components** (e.g., **valve seals, oil pump, or timing chain** if they re failing).

- **Specialized tools** (e.g., **ring compressor, torque wrench, or cylinder bore gauge**).

8. **Mixed Results in Some Cases**

While most users see **noticeable improvements**, a **small percentage** report **minimal changes**, especially if the engine was **already in good condition** before installation. Expectations should be **realistic** this is a **maintenance upgrade**, not a performance miracle.

9. **Potential for Installation Errors**

If not installed correctly, the rings could **stick, cause scoring, or fail to seat properly**, leading to **poor compression, oil leaks, or even engine damage**. This risk is why **professional installation is highly recommended**.

10. **Not a Permanent Solution for Aging Engines**

If the engine has **high mileage (150,000 miles) or signs of wear** (e.g., **blue smoke, excessive oil consumption, or knocking**), the ATI kit may **buy you some time**, but a **full engine rebuild or replacement** may still be the best long-term solution.

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### **Conclusion**

The **ATI Ring Balancer Kit (918980-70 with Viton O-ring) for the C5980** is a **highly beneficial upgrade** for owners looking to **restore engine efficiency, reduce oil consumption, and extend the life of their Honda engine**. It is particularly valuable for:

- **Older engines** showing signs of **ring wear** (oil burning, poor compression).

- **Modified engines** (turbocharged, tuned) that need **better support**.

- **Owners who want to avoid a full rebuild** but still improve performance.

However, it is **not a magic fix** it requires **proper installation** and may still need **eventual replacement** as the engine ages. If the engine has **severe internal damage**, other repairs will be necessary alongside (or instead of) the ring upgrade.

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### **Final Recommendation**

**Yes, install the ATI Ring Balancer Kit if:**

Your engine is **showing signs of ring wear** (oil consumption, rough idle, loss of power).

You want to **prevent costly engine damage** before it gets worse.

You re **not planning a full rebuild** but want to **extend the engine s life**.

You have a **skilled mechanic** (or are willing to learn) to install it correctly.

Your engine is **otherwise in decent condition** (no cracked pistons, scored cylinders, etc.).

**Avoid or reconsider if:**

Your engine has **major internal damage** (requires a full rebuild).

You re **not willing to pay for professional installation** (DIY risks errors).

You re looking for **big power gains** (this is an efficiency upgrade, not a performance boost).

Your engine is **still under warranty** (check terms before modifying).

**Best Approach:**

1. **Diagnose the engine** (check for oil consumption, compression, and overall health).

2. **Get a professional opinion** before committing (some mechanics may recommend a full rebuild instead).

3. **Install with care** (follow ATI s instructions or use a Honda-specialized mechanic).

4. **Monitor performance** after installation (oil consumption should decrease, power should stabilize).

**Final Verdict:**

For the **average C5980 owner** with a **

Details:

New Cometic C5980-70 Viton oring rebuild kit for the ATI Super Dampers, 6/3 ring. This is equivalent to ATI part# 918980-70, 70-70-70 Douro viton oring, oring.

specifications cranshafengin:

  • brand: Cometic
  • mpn: C5980-70
  • part type: Ring Balancer
  • core charges: This Product Has No Core Charge.
  • manufacturer warranty: Unspecified Length
  • country of origin: United States

general cranshafengin:

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

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  • city: Wilson, North Carolina
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  • quantity: 1
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  • started: April 27, 2026
part type: ring balancer, core charges: this product has no core charge., manufacturer warranty: unspecified length, country of origin: united states,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 20036756720588793,
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