GATES SX-3871 Fuel Tank Cap Gq 3.7L 5.2L 5.9L 6.3L 6.6L

( Brand: Gates ), ( Manufacturer Part Number: SX-3871 ), ( 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: C382 12-62 ), ( Compatible Model: W200 Pickup ), ( Compatible Year: 1973 1972 1971 1970 1969 1968 ), ( 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 Pickup 3.7l 5.2l 5.9l 6.3l 6.6l Gq fits W200 1968–1973

The **Gates SX-3871 Fuel Tank Cap** is a meticulously engineered, high-performance replacement part designed specifically for the iconic 1968 through 1973 Dodge W200 Ram Charger, Challenger, and Coronet models equipped with the legendary 3.7L Slant-6, 5.2L Magnum V8, 5.9L Hemi V8, 6.3L Hemi V8, or the massive 6.6L Hemi V8 engines. Crafted from durable, corrosion-resistant materials, this fuel cap is built to withstand the demands of both daily driving and spirited performance applications, ensuring a secure and reliable seal while maintaining the classic aesthetic of the original equipment. The cap features a robust, threaded design that matches the factory specifications precisely, preventing fuel vapors from escaping while also reducing the risk of leaks or spills critical for maintaining engine performance and longevity, especially under high-performance conditions. Its smooth, contoured shape not only enhances the vehicle s aggressive, muscle-car stance but also integrates seamlessly with the bodywork, preserving the original look without compromising functionality. The cap is equipped with a sturdy, spring-loaded mechanism that ensures a tight, airtight closure every time, reducing fuel evaporation and keeping emissions in check, which is particularly beneficial for enthusiasts who prioritize both power and compliance. Whether installed on a daily driver, a weekend cruiser, or a high-performance hot rod, the Gates SX-3871 delivers the perfect blend of form and function, embodying the rugged reliability and timeless appeal of the classic Dodge muscle cars it was designed for. Built to exacting standards, this replacement cap is a must-have accessory for any owner seeking to restore authenticity, improve fuel efficiency, and maintain the integrity of their vehicle s fuel system.

### **Pros and Cons of buying a Gates SX-3871 Fuel Tank Cap for 1968 1973 Dodge W200 (3.7L 6.6L)**

1. **OEM Fitment and Compatibility** The Gates SX-3871 is designed specifically for the 1968 1973 Dodge W200 series with 3.7L, 5.2L, 5.9L, 6.3L, and 6.6L engines. This ensures a proper seal and prevents fuel leaks or vapor loss, which is critical for maintaining engine performance and emissions compliance.

2. **High-Quality Materials** Gates is a well-known manufacturer of automotive fuel system components, known for using durable materials that resist corrosion, cracking, and degradation over time. This cap should last the life of the vehicle if properly installed and maintained.

3. **Seal Integrity** The cap features a reliable gasket or sealing mechanism that prevents fuel vapors from escaping, which helps maintain proper fuel pressure and reduces the risk of fuel odor inside the cab or engine bay.

4. **Easy Installation** The design is straightforward, making it a relatively simple DIY replacement. No specialized tools are typically required, though a torque wrench may be needed to ensure the correct tightness.

5. **Cost-Effective Solution** Compared to OEM replacements (which may be harder to find or more expensive), the Gates SX-3871 offers a budget-friendly alternative without sacrificing quality.

6. **Prevents Fuel Contamination** A properly sealed cap prevents debris, moisture, or contaminants from entering the fuel system, which can damage the fuel pump, injectors, or carburetor over time.

7. **Compatibility with Aftermarket Mods** If you ve modified your vehicle (e.g., added an aftermarket fuel pump, performance carburetor, or fuel injection system), a reliable cap ensures the new components function correctly without leaks.

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1. **Potential for Counterfeit or Low-Quality Replacements** Gates is a reputable brand, but counterfeit or knockoff versions may circulate in the market. Always purchase from a trusted seller (e.g., RockAuto, Summit Racing, or an authorized Gates distributor) to avoid inferior products.

2. **Stiff or Difficult-to-Open Mechanism** Some users report that the locking mechanism on the cap can become stiff over time, especially if the vehicle is not driven frequently. This may require occasional lubrication or cleaning to maintain functionality.

3. **Gasket Wear Over Time** While Gates caps are durable, the internal gasket can degrade if the vehicle is driven in extreme conditions (e.g., off-road, high humidity, or with frequent short trips). This could lead to minor fuel leaks or vapor loss.

4. **Limited Availability in Some Regions** Depending on where you purchase it, the Gates SX-3871 may not be as widely stocked as generic or aftermarket alternatives. Online retailers are the most reliable source.

5. **Price Sensitivity** While not excessively expensive, it may be slightly more costly than the cheapest generic fuel caps available. However, the trade-off in quality is usually worth it for a classic vehicle where reliability is key.

6. **Potential for Misalignment During Installation** If not installed correctly, the cap could be loose or improperly seated, leading to leaks or vapor escape. This risk applies to any fuel cap replacement, not just the Gates model.

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The **Gates SX-3871 fuel tank cap** is an excellent choice for 1968 1973 Dodge W200 owners due to its **OEM fitment, durability, and reliability**. The pros far outweigh the cons, especially for those who prioritize long-term performance and fuel system integrity. The main drawbacks counterfeit risks, occasional stiffness, and gasket wear are manageable with proper care and sourcing.

For most owners, the **benefits of using a Gates cap** (reduced leaks, improved fuel system health, and peace of mind) make it the **best available option**, even if slightly more expensive than generic alternatives. If budget is a concern, a **high-quality aftermarket cap from a trusted brand** (e.g., AC Delco, Bosch, or Stanadyne) could be a reasonable substitute, but Gates remains the safest bet for longevity.

- **Buy from a reputable seller** (e.g., RockAuto, Summit Racing, or an authorized Gates dealer) to avoid counterfeits.

- **Inspect the gasket and threads** before installation to ensure no damage.

- **Lubricate the locking mechanism** occasionally with silicone spray if it feels stiff.

- **Tighten the cap securely** but avoid overtightening, which could strip the threads.

- **Consider replacing the gasket** if the vehicle has high mileage or signs of fuel leaks.

**Final Verdict:** The **Gates SX-3871 is the best fuel tank cap for your 1968 1973 Dodge W200**, offering a balance of performance, durability, and ease of use. If you value reliability above all else, this is the recommended choice.

Details:

Gates Fuel Tank Cap for 1968-1973 Dodge W200 Pickup 3.7L 5.2L 5.9L 6.3L 6.6L gq: Status: In Stock.

part #: sx3871 prices

• $23.59-$31.63

specifications fueltanksysteme:

• for makes: Dodge
• for years: 1968-1973
• brand: Gates
• mpn: Sx-3871
• 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: C382 12-62
• compatible model: W200 Pickup
• compatible year: 1973 1972 1971 1970 1969 1968
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

payments fueltanksysteme:

• credit card: Diners-club
• other
• wallet: Paypal

shipping fueltanksysteme:

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

returns fueltanksysteme:

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

seller fueltanksysteme:

• # reviews: 661075
• city: Indianapolis, Indiana
• rating: 99.6%

offer fueltanksysteme:

• options: Ship-to-home
• started: May 25, 2026
• quantity: 10
• sold: 0
• availability: In Stock

general fueltanksysteme:

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

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