GATES SX-2831 Fuel Tank Cap 3.0L 3.8L 4.1L 4.3L 4.9L

( Brand: Gates ), ( Manufacturer Part Number: SX-2831 ), ( 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: C619 55-38 ), ( Compatible Year: 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Buick 3.0l 3.8l 4.1l 4.3l 4.9l Bx fits ELECTRA 1975–1990

The **Gates SX-2831 Fuel Tank Cap** is a meticulously engineered, high-performance replacement part designed specifically for 1975 through 1990 Buick Electra models equipped with 3.0L, 3.8L, 4.1L, 4.3L, and 4.9L V8 engines. Crafted from durable, corrosion-resistant materials, this fuel cap is built to withstand the harshest driving conditions while ensuring a secure, leak-proof seal that maintains optimal fuel system integrity. The cap features a robust, threaded design that aligns perfectly with the original equipment manufacturer (OEM) specifications, guaranteeing a snug fit that prevents fuel vapors from escaping while also blocking contaminants from entering the tank. Its smooth, ergonomic grip allows for easy installation and removal, even in tight spaces, while the integrated venting system helps regulate internal pressure, reducing the risk of fuel sloshing or spillage during aggressive driving or sharp turns. Engineered with precision, the Gates SX-2831 is not just a functional replacement but a performance-enhancing upgrade, ensuring reliable operation and extending the lifespan of your vehicle s fuel system. Whether you re restoring a classic Electra or maintaining a well-loved vintage model, this fuel tank cap delivers the durability, precision, and reliability expected from Gates, a brand synonymous with automotive excellence.

**Pros and Cons of buying a Gates SX-2831 Fuel Tank Cap for 1975 1990 Buick Electra (3.0L 4.9L Engines)**

1. **OEM Fitment and Compatibility** The Gates SX-2831 is designed as an exact replacement for the original fuel tank cap on these Buick Electra models, ensuring a proper seal and preventing fuel vapors from escaping. This helps maintain emissions compliance and fuel efficiency.

2. **High-Quality Materials** Gates is a reputable brand known for durable, corrosion-resistant components. The cap is likely made from sturdy plastic and metal, resistant to cracking or warping over time, which is critical for long-term reliability.

3. **Easy Installation** The part is designed to be a straightforward drop-in replacement, requiring no modifications to the fuel tank or surrounding components. Most buyers can install it themselves with basic tools.

4. **Prevents Fuel Evaporation and Vapor Loss** A properly sealed fuel cap reduces fuel evaporation, which can improve mileage and extend the life of the fuel system. It also helps maintain proper fuel pressure in the tank.

5. **Prevents Contamination** A secure seal keeps debris, moisture, and contaminants out of the fuel tank, protecting the fuel system and engine from potential damage.

6. **Widely Available and Affordable** As an aftermarket part, it is generally inexpensive compared to OEM replacements and can be found at most auto parts stores or online retailers.

7. **Compatibility Across Multiple Engines** The cap fits all listed engine sizes (3.0L 4.9L) in the 1975 1990 Buick Electra, making it a versatile choice for owners with different models.

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1. **Potential Quality Variations** While Gates is a trusted brand, counterfeit or lower-quality aftermarket parts may sometimes be sold under the same part number. Buyers should verify the seller s reputation to ensure authenticity.

2. **Stiffness or Difficulty Opening/Closing** Some aftermarket fuel caps, including certain Gates models, can become stiff over time due to material hardening or debris buildup. This may require occasional lubrication or cleaning.

3. **No Pressure Relief Valve (PRV) Upgrade** The SX-2831 is a basic replacement cap and does not include an upgraded pressure relief valve, which some performance-oriented buyers may prefer for better fuel system performance under high loads.

4. **Limited Aesthetic Options** Unlike some aftermarket caps, this Gates part does not offer custom colors or designs, so it will match the stock appearance of the vehicle.

5. **Possible Misalignment During Installation** If the fuel tank cap hole in the filler neck is damaged or misaligned, the new cap may not seat properly, leading to leaks or improper sealing. A visual inspection of the filler neck is recommended before installation.

6. **No Included Gasket or Seal** Some aftermarket caps require an additional gasket or seal for a perfect fit. While the Gates SX-2831 typically includes a seal, buyers should confirm this before purchasing to avoid additional costs.

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The Gates SX-2831 fuel tank cap is a **reliable, cost-effective, and easy-to-install replacement** for the 1975 1990 Buick Electra s original cap. It addresses common issues like fuel evaporation, contamination, and emissions concerns while maintaining compatibility across the listed engine sizes. However, buyers should ensure they are purchasing an authentic Gates part to avoid quality issues and verify that the filler neck is in good condition before installation.

For most owners, this cap is the **best choice** for a straightforward, functional replacement. If you are looking for performance upgrades (e.g., a higher-quality pressure relief valve), you may need to explore specialized aftermarket options, but for standard use, the Gates SX-2831 is highly recommended.

Purchase the Gates SX-2831 from a trusted retailer (such as RockAuto, Amazon, or a local auto parts store with a return policy) to ensure authenticity. Inspect the fuel filler neck for damage before installation, and consider applying a small amount of dielectric grease to the threads for smoother operation. This cap will provide a secure seal and reliable performance for years.

Details:

Gates Fuel Tank Cap for 1975 1990 Buick Electra 3.0L 3.8L 4.1L 4.3L 4.9L bx: Status: In Stock.

part #: sx2831 prices

• $29.07-$86.35

specifications fueltanksysteme:

• for models: Electra
• for makes: Buick
• for years: 1975-1990
• brand: Gates
• mpn: Sx-2831
• 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: C619 55-38
• compatible year: 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

general fueltanksysteme:

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

offer fueltanksysteme:

• availability: In Stock
• options: Ship-to-home
• started: May 26, 2026
• quantity: 10
• sold: 0

seller fueltanksysteme:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 661228

returns fueltanksysteme:

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

payments fueltanksysteme:

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

shipping fueltanksysteme:

• transit: 3-5 Days
• class: Standard, Expedited
• cost: $0.00
• type: Fixed
• service: Standard, Expedited

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