GATES SX-4702 Fuel Tank Cap Qo 3.7L 5.2L 5.9L 6.3L 6.6L

( Brand: Gates ), ( Manufacturer Part Number: SX-4702 ), ( 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: C533 13-50 ), ( Compatible Model: Fury Iii ), ( Compatible Year: 1974 1973 1972 1971 1970 1969 1968 1967 1966 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Plymouth 3.7l 5.2l 5.9l 6.3l 6.6l Qo fits FURY 1966–1974

The **Gates SX-4702 Fuel Tank Cap** is a meticulously engineered replacement part designed specifically for the classic 1966 through 1974 Plymouth Fury models equipped with the iconic 3.7L Slant-6, 5.2L V8, 5.9L V8, 6.3L V8, and 6.6L Hemi engines, including the legendary Quad-O-Matic (QO) transmission variants. Crafted with precision to match the original factory specifications, this fuel cap ensures a seamless fit while maintaining the vehicle s authentic aesthetic and performance integrity. The cap features a robust, durable construction with a high-quality rubber gasket that seals tightly against the fuel tank opening, preventing leaks, spills, and the entry of contaminants that could compromise fuel system efficiency. Its classic design, complete with the distinctive Gates branding and a polished metal finish, preserves the vintage charm of your Fury while delivering modern reliability. The cap s secure locking mechanism guarantees that it remains firmly in place during transit, reducing the risk of accidental dislodgment, and its ergonomic handle provides easy access for refueling. Whether you re restoring a showroom-worthy Fury or maintaining a daily driver, the Gates SX-4702 is an essential upgrade that combines heritage styling with dependable functionality, ensuring your fuel system operates smoothly for years to come.

### Pros and Cons of buying a Gates SX-4702 Fuel Tank Cap for a 1966 1974 Plymouth Fury (3.7L 6.6L)

1. **OEM Fitment and Compatibility** The Gates SX-4702 is designed specifically for the 1966 1974 Plymouth Fury models with engines ranging from 3.7L to 6.6L, including the 5.2L, 5.9L, and 6.3L V8s. This ensures an exact fit without modifications, reducing the risk of leaks or improper sealing.

2. **High-Quality Materials** Gates is a well-regarded brand known for durable, corrosion-resistant components. The cap is likely made from metal or reinforced plastic, which helps prevent warping, cracking, or fuel vapor leaks over time.

3. **Sealed Fuel System Benefits** A properly sealed fuel tank cap helps maintain proper fuel vapor pressure, improving engine performance and fuel efficiency. It also reduces evaporative emissions, which can be beneficial for older vehicles that may not have modern emissions controls.

4. **Prevents Fuel Odors and Contamination** A faulty or missing fuel cap allows moisture and debris to enter the fuel system, leading to rust, sediment buildup, or even fuel contamination. The Gates cap helps keep the system clean and functional.

5. **Easy Installation** The cap is designed for straightforward installation, requiring no special tools beyond a basic wrench or socket. It typically screws on securely without excessive force, reducing the risk of stripping the threads.

6. **Long-Term Reliability** Gates products are known for longevity, especially in applications where they are exposed to fuel vapors and environmental elements. This cap should last the lifespan of the vehicle if properly maintained.

7. **Availability and Support** Gates is a widely available brand, meaning parts are easy to find at auto parts stores, online retailers, or directly from the manufacturer. If issues arise, customer support or warranties may be accessible.

---

1. **Potential Overkill for Minor Use** If the original cap was functional but slightly worn, replacing it with a Gates cap may be unnecessary unless there are visible signs of failure (e.g., cracks, leaks, or a broken seal). A cheaper aftermarket cap might suffice in some cases.

2. **Cost Compared to Alternatives** The Gates SX-4702 is a premium product, and its price may be higher than generic or budget-brand fuel caps. For owners on a tight budget, there are cheaper alternatives that may work just as well for basic sealing.

3. **Thread Compatibility Concerns (Rare)** While the Gates cap is designed for your Fury, there have been occasional reports of thread mismatches in older vehicles due to wear or modifications. Always inspect the tank opening before installation to ensure a perfect fit.

4. **No Additional Features (Beyond Basic Functionality)** Unlike some modern fuel caps, this Gates cap does not include features like pressure relief valves or advanced sealing mechanisms beyond what was standard in the 1960s 70s. If you need a cap with modern emissions compliance, this may not be the best choice.

5. **Installation Challenges on Rusty Tanks** Older Plymouth Fury fuel tanks can develop rust or corrosion around the cap threads, making installation difficult. In such cases, cleaning or treating the tank may be necessary before fitting the new cap.

6. **Limited Customization** The Gates cap is a standard fitment part with no customizable features (e.g., color, style, or additional seals). If aesthetics or specific performance tweaks are a priority, this may not be the best option.

---

The Gates SX-4702 fuel tank cap is an excellent choice for restoring or maintaining a 1966 1974 Plymouth Fury, particularly if you prioritize reliability, OEM fitment, and long-term durability. Its high-quality construction and compatibility with your vehicle s engine lineup make it a dependable upgrade over worn or failing original parts. However, if budget constraints or minor functionality issues are concerns, a lower-cost alternative might be considered provided it meets basic sealing requirements.

For most owners seeking a reliable, long-lasting solution, the Gates cap is strongly recommended. It ensures proper fuel system integrity, prevents leaks, and aligns with the vehicle s original specifications, making it a worthwhile investment for both performance and longevity.

- Your current cap is damaged, leaking, or missing.

- You want a high-quality, long-term solution that matches OEM standards.

- You value a sealed fuel system to improve engine performance and emissions compliance.

- Your original cap is still functional but slightly worn (unless leaks or vapor loss are confirmed).

- You are working on a tight budget and can find a similarly rated aftermarket cap at a lower cost.

- The fuel tank threads are severely corroded, requiring additional preparation before installation.

Details:

Gates Fuel Tank Cap for 1966-1974 Plymouth Fury III 3.7L 5.2L 5.9L 6.3L 6.6L qo: Status: In Stock.

part #: sx4702 prices

• $22.72-$36.11

specifications fueltanksysteme:

• for models: Fury
• for makes: Plymouth
• for years: 1966-1974
• brand: Gates
• mpn: Sx-4702
• 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: C533 13-50
• compatible model: Fury Iii
• compatible year: 1974 1973 1972 1971 1970 1969 1968 1967 1966
• 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

seller fueltanksysteme:

• rating: 99.5%
• city: Indianapolis, Indiana
• # reviews: 630267

offer fueltanksysteme:

• options: Ship-to-home
• started: March 8, 2026
• availability: In Stock
• sold: 0
• quantity: 10

returns fueltanksysteme:

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

payments fueltanksysteme:

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

shipping fueltanksysteme:

• type: Fixed
• cost: $0.00
• service: Standard, Expedited
• class: Standard, Expedited
• transit: 3-6 Days

Gates SX-4702 Is Similar To:

• 10823 Stant Fuel Tank Cap Carquest Gates Cl 00333420082364 (35.9% similar) ...(March 25th, 2018)
• 23924 Gates Corporation Fuel Fill Hose (27.2% similar) Suitable for use with gasoline, gasohol blends of ethanol, methanol, ether's. 5 weight lbs. Suitable for diesel and bio diesel to B20. Cuts easily with knife and wire cutters. Also works well on auxiliary fuel tanks recreational vehicles. Note: use Gates super hex clamps for reliable installation ...(May 27th, 2018)
• 23930 Gates Fuel Filler Hose (26.1% similar) ...(November 4th, 2017)
• 23936 Gates Corporation Fuel Fill Hose (27.2% similar) Note: use Gates super hex clamps for reliable installation. Cuts easily with knife and wire cutters. 25 weight lbs. Suitable for use with gasoline, gasohol blends of ethanol, methanol, ether's. Packaging 5 per carton standard pack 8 product attributes type fuel fill hose specifications center line ...(April 25th, 2018)
• 23940 Gates Fuel Filler Hose (26.1% similar) If your looking to increase gas mileage, get better engine performance, or help the environment 123AUTOPARTS on motors is place buy now...(January 24th, 2019)
• 23964 Gates Fuel Filler Hose (26.1% similar) ...(June 30th, 2018)
• 23968 Gates Fuel Filler Hose (26.1% similar) Get in, sit down, hold on, shut up and enjoy the ride...(March 10th, 2018)
• 23972 Gates Fuel Filler Hose (26.1% similar) Thanks again for trusting DI-auto to get you the right part as quickly possible...(October 15th, 2018)
• 24702 Gates Fuel Filler Hose (26.1% similar) ...(April 3rd, 2018)
• 24703 Gates Fuel Filler Hose (26.1% similar) Small manufacture updates to finish or fit may occur on some parts without stock photo. The return address support most times is incorrect. The photos provide a product presentation of part being sold...(May 5th, 2018)
• 24711 Gates Fuel Hose Degree 72053981315 (29.9% similar) One per package fuel fill hose - angled. Gates fuel fill hose - angled x deg...(September 18th, 2018)