GATES SX-5929 Fuel Tank Gas Cap Mr J-2800 3.8L 5.3L 5.4L L6 V8

( Brand: Gates ), ( Manufacturer Part Number: SX-5929 ), ( 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: C518 16-63 ), ( Compatible Model: J-2800 ), ( Compatible Year: 1968 1967 1966 1965 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Jeep 3.8l 5.3l 5.4l L6 V8 Gas Mr fits 1965–1968

The **Gates SX-5929 Fuel Tank Cap** is a meticulously engineered, high-performance replacement part designed specifically for the iconic 1965 through 1968 Jeep J-Series vehicles, including the legendary J-2800 models equipped with the robust **3.8L, 5.3L, or 5.4L inline-six (I6) or V8 gasoline engines**. Crafted with precision and built to exacting standards, this fuel cap is more than just a functional component it s a critical element in maintaining the integrity and performance of your classic Jeep s fuel system. The cap features a **durable, corrosion-resistant design**, ensuring it withstands the harshest conditions, from dusty off-road adventures to the elements of long-term storage. Its **secure, tamper-resistant locking mechanism** not only prevents accidental spills during transit but also deters unauthorized access, adding an extra layer of protection for your vehicle s fuel supply. The cap s **smooth, ergonomic grip** allows for easy installation and removal, even in tight spaces, while its **compatible gasket** ensures a perfect seal, minimizing fuel vapors and reducing evaporation key factors in preserving fuel efficiency and preventing contamination. Whether you re restoring a vintage J-Series to its original glory or maintaining a well-loved classic, the Gates SX-5929 is the ideal choice for reliability, authenticity, and performance. Built to match the original specifications, this cap guarantees a seamless fit and a lasting solution for your Jeep s fuel system, ensuring your engine runs as smoothly as the day it left the factory.

**Pros and Cons of buying a Gates SX-5929 Fuel Tank Cap for a 1965 1968 Jeep J-2800 (3.8L, 5.3L, 5.4L L6/V8 Gas)**

1. **OEM Fitment and Compatibility** The Gates SX-5929 is designed as an exact replacement for the original fuel cap on your Jeep model, ensuring a proper seal and alignment with the tank s filler neck. This reduces the risk of leaks or improper installation.

2. **Durable Construction** Gates is a well-regarded brand known for high-quality automotive parts, including fuel caps. The SX-5929 is typically made from sturdy plastic and metal components, which should resist cracking or warping over time, especially in the rugged conditions common to Jeep vehicles.

3. **Seal Integrity** A properly functioning fuel cap is critical for maintaining fuel vapor pressure and preventing fuel evaporation. The Gates cap includes a gasket that should provide a tight seal, helping to meet emissions standards and reduce fuel loss.

4. **Easy Installation** The design is straightforward, and many users report that it installs without requiring additional tools or modifications. This makes it a convenient upgrade or replacement option for DIYers.

5. **Compatibility with Aftermarket Mods** If you ve modified your Jeep s fuel system (e.g., added a fuel gauge sender or upgraded fuel lines), the Gates cap should still fit correctly, provided the filler neck dimensions remain unchanged.

6. **Reliability for Off-Road Use** The cap is built to withstand vibrations and minor impacts, which is beneficial if your Jeep is frequently used off-road or in rough terrain.

7. **Availability and Support** Gates parts are widely available through automotive retailers, online marketplaces, and Jeep specialty shops. If issues arise, Gates offers customer support and warranties, though coverage may vary by retailer.

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1. **Potential for Counterfeit or Low-Quality Copies** Due to the popularity of Gates parts, some sellers may offer counterfeit or knockoff versions that fail to meet the same standards. Always purchase from reputable sources (e.g., official Gates dealers, trusted online retailers, or Jeep-specific shops) to avoid this risk.

2. **Price Point** While not excessively expensive, the Gates SX-5929 may cost more than generic or aftermarket alternatives (e.g., $20 $40 vs. $10 $20 for non-branded options). If budget is a concern, cheaper caps might suffice for basic functionality, though they may lack durability.

3. **Limited Customization** Unlike some aftermarket caps, the Gates SX-5929 is a direct replacement and does not offer additional features (e.g., integrated fuel gauges, decorative finishes, or unique designs). If aesthetics or functionality beyond OEM standards are priorities, other options may exist.

4. **Potential for Gasket Wear Over Time** Even high-quality fuel caps can develop worn or brittle gaskets after years of use, especially in extreme temperatures or with frequent opening/closing. This may require periodic inspection or replacement of the gasket alone.

5. **Installation Challenges with Modified Tanks** If your Jeep s fuel tank has been altered (e.g., resized, drilled for modifications, or fitted with non-standard filler necks), the Gates cap may not align perfectly. Always verify compatibility with your specific tank setup.

6. **Environmental Exposure Risks** Fuel caps are exposed to fuel vapors, UV light, and moisture, which can degrade plastic components over time. While Gates caps are durable, prolonged exposure to harsh conditions may eventually lead to cracking or seal failure.

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The Gates SX-5929 fuel tank cap is a **strong, reliable choice** for your 1965 1968 Jeep J-2800, offering OEM fitment, durability, and peace of mind regarding seal integrity. Its pros particularly its compatibility, build quality, and ease of installation outweigh the minor cons, which are largely mitigated by purchasing from trusted sources and inspecting the cap periodically. While cheaper alternatives exist, they may compromise on longevity or performance, making the Gates cap a worthwhile investment for those prioritizing quality and fitment.

If your Jeep s fuel system is stock or minimally modified, the Gates SX-5929 is **highly recommended**. However, if you ve made significant changes to the tank or filler neck, double-check compatibility before purchasing. For off-road enthusiasts or those seeking long-term reliability, the Gates cap is an excellent standard to uphold.

Purchase the Gates SX-5929 from an authorized dealer or a reputable online retailer (e.g., RockAuto, Summit Racing, or a local Jeep shop) to ensure authenticity. If cost is a concern, compare it with other high-quality brands (e.g., AC Delco, Bosch) that offer similar performance. Always replace the gasket if it shows signs of wear, and inspect the cap periodically for cracks or damage. For most Jeep owners, this cap will serve as a dependable, long-lasting solution.

Details:

Gates Fuel Tank Cap for 1965-1968 Jeep J-2800 3.8L 5.3L 5.4L L6 V8 Gas mr: Status: In Stock.

part #: sx5929 prices

• $17.36-$26.96

specifications fueltanksysteme:

• for makes: Jeep
• for years: 1965-1968
• brand: Gates
• mpn: Sx-5929
• 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: C518 16-63
• compatible model: J-2800
• compatible year: 1968 1967 1966 1965
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

payments fueltanksysteme:

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

seller fueltanksysteme:

• city: Indianapolis, Indiana
• rating: 99.7%
• # reviews: 663262

returns fueltanksysteme:

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

offer fueltanksysteme:

• started: June 1, 2026
• options: Ship-to-home
• quantity: 10
• availability: In Stock
• sold: 0

shipping fueltanksysteme:

• class: Standard, Expedited
• transit: 2-5 Days
• cost: $0.00
• type: Fixed
• service: Standard, Expedited

general fueltanksysteme:

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

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