GATES SX-2778 Fuel Tank Cap Monaco 3.0L 3.7L 5.2L 5.9L 6.6L 7.2L

( Brand: Gates ), ( Manufacturer Part Number: SX-2778 ), ( Type: Fuel Tank Cap ), ( Placement On Vehicle: Air Fuel Delivery Hardware Fasteners Fittings ), ( Item Width: 3.630 ), ( Item Height: 3.000 ), ( Manufacturer Warranty: Recommended Service Interval ), ( Ipn: C705 65-24 ), ( Compatible Model: Monaco ), ( Compatible Year: 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Dodge Monaco 3.0l 3.7l 5.2l 5.9l 6.6l 7.2l fits EX 1978–1992

The **Gates SX-2778 Fuel Tank Cap** is a meticulously engineered, high-performance replacement part designed specifically for the iconic 1978 through 1992 Dodge Monaco lineup, catering to a wide range of powerful V8 and V6 engines, including the 3.0L, 3.7L, 5.2L, 5.9L, 6.6L, and the legendary 7.2L Magnum. Crafted with precision and built to exacting standards, this fuel tank cap is not merely a functional component but a critical element in maintaining the integrity and efficiency of your vehicle s fuel system. The cap features a robust, durable construction, utilizing high-grade materials that resist corrosion, warping, and degradation over time, ensuring long-term reliability even under the demanding conditions of high-performance driving. Its secure, leak-proof design incorporates a reliable sealing mechanism that prevents fuel vapors from escaping, reducing emissions and preserving fuel efficiency while also safeguarding against potential spills or leaks that could compromise safety or performance. The cap s sleek, aerodynamic shape is engineered to minimize drag and turbulence, contributing to a smoother airflow during refueling and reducing the risk of fuel splashing or spillage. For enthusiasts and restorers seeking to restore their Monaco to its original glory or upgrade it with modern performance enhancements, this Gates part offers a perfect blend of authenticity and durability. Whether installed on a classic muscle car, a daily driver, or a high-mileage vehicle, the SX-2778 ensures a tight, secure fit that aligns with the original equipment manufacturer s specifications, providing peace of mind and confidence in every drive.

### Pros and Cons of buying a Gates SX-2778 Fuel Tank Cap for a 1978 1992 Dodge Monaco (3.0L 7.2L)

#### **Pros**

1. **OEM Fitment and Compatibility** The Gates SX-2778 is designed as an exact replacement for the original fuel cap on the specified Dodge Monaco models, ensuring a proper seal and preventing fuel evaporation or contamination.

2. **Durable Construction** Gates is a reputable manufacturer known for high-quality automotive parts. This cap is likely made from sturdy plastic and metal components, resistant to cracking or warping over time.

3. **Prevents Fuel Loss and Evaporation** A properly sealed fuel cap reduces fuel vapor emissions, which can improve fuel efficiency and comply with emissions regulations.

4. **Easy Installation** Since it s a direct replacement, installation is straightforward no modifications are typically required, and it should fit securely without additional tools.

5. **Compatibility with Multiple Engines** The cap fits across a wide range of engine sizes (3.0L 7.2L), making it a versatile choice for Monaco owners regardless of their vehicle s configuration.

6. **Potential Cost Savings** If the original cap is damaged or missing, replacing it with this Gates part may be more affordable than purchasing an aftermarket alternative or waiting for an OEM replacement.

7. **May Improve Fuel System Reliability** A well-sealed cap helps maintain proper fuel pressure and prevents debris or moisture from entering the tank, reducing the risk of fuel system issues.

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#### **Cons**

1. **Potential for Counterfeit Parts** Gates parts can sometimes be counterfeited, especially if purchased from untrusted sellers. Ensure the part is genuine by checking the packaging, serial numbers, or purchasing from a reputable dealer.

2. **Limited Availability in Some Regions** Depending on where you shop, this specific part may not be as widely stocked as more common aftermarket alternatives, requiring online ordering or special ordering.

3. **Price May Be Higher Than Aftermarket Options** While Gates is a quality brand, some aftermarket fuel caps may offer similar performance at a lower cost. However, these may not always be as durable or precisely fitted.

4. **Possible Styling Differences** If the original cap was custom or non-standard (e.g., chrome, unique shape), the Gates replacement may not match the exact appearance, though functionality remains the same.

5. **Installation Challenges on Older Vehicles** Some older Dodges may have rusted or corroded fuel tank openings, making installation difficult even with an exact-fit part. Cleaning or minor repairs to the tank opening may be necessary.

6. **No Additional Features** Unlike some aftermarket caps, this Gates part does not include extra features like built-in fuel level indicators or special seals, which may be desirable for some owners.

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### **Conclusion**

The Gates SX-2778 fuel tank cap is a reliable and high-quality choice for restoring or replacing the original fuel cap on a 1978 1992 Dodge Monaco across the listed engine sizes. Its OEM fitment, durability, and compatibility make it a strong option for those prioritizing performance and longevity. However, buyers should verify authenticity to avoid counterfeit parts and be prepared for potential installation challenges if the fuel tank opening is damaged. For most owners, the benefits outweigh the drawbacks, especially if they value a direct replacement with minimal risk of fuel system issues.

### **Recommendation**

If you need a replacement fuel cap for your Dodge Monaco and want a part that matches the original specifications, the **Gates SX-2778 is highly recommended**. Purchase it from a trusted automotive parts supplier (such as RockAuto, Summit Racing, or a local dealership) to ensure authenticity. If budget is a concern, compare it with other OEM or high-quality aftermarket alternatives, but be cautious of parts that may not seal properly. Always inspect the fuel tank opening for corrosion before installation to ensure a secure fit. For most users, this cap will provide a reliable, long-term solution without issues.

Details:

part #: sx2778 prices

• $20.09-$29.18

specifications fueltanksysteme:

• for models: Ex
• for makes: Dodge
• for years: 1978-1992
• brand: Gates
• mpn: Sx-2778
• type: Fuel Tank Cap
• placement on vehicle: Air Fuel Delivery Hardware Fasteners Fittings
• item width: 3.630
• item height: 3.000
• manufacturer warranty: Recommended Service Interval
• ipn: C705 65-24
• compatible model: Monaco
• compatible year: 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

returns fueltanksysteme:

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

offer fueltanksysteme:

• options: Ship-to-home
• started: May 11, 2026
• availability: In Stock
• quantity: 10
• sold: 0

shipping fueltanksysteme:

• class: Standard, Expedited
• type: Fixed
• cost: $0.00
• service: Standard, Expedited
• transit: 3-7 Days

payments fueltanksysteme:

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

general fueltanksysteme:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

seller fueltanksysteme:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 655830

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