GATES SX-4377 Fuel Tank Cap Fleetwood Uh 60 6.4L 7.0L V8

( Brand: Gates ), ( Manufacturer Part Number: SX-4377 ), ( 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: C180 28-64 ), ( Compatible Model: Series 60 Fleetwood ), ( Compatible Year: 1964 1963 1962 1961 1960 1959 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Cadillac Series Fleetwood 6.4l 7.0l V8 Uh fits 1959–1964

The **Gates SX-4377 Fuel Tank Cap** is a meticulously engineered, high-performance replacement part designed specifically for the iconic 1959 through 1964 Cadillac 60 Series Fleetwood models equipped with the legendary **6.4L (385 cubic inch) and 7.0L (429 cubic inch) V8 engines**. Crafted to exacting standards, this fuel tank cap is built to restore both the aesthetic integrity and functional reliability of your classic Cadillac, ensuring a seamless fit and operation that matches the original equipment manufacturer (OEM) specifications. The cap features a robust, chrome-plated metal construction, exuding the same timeless elegance and craftsmanship that defined Cadillac s golden era. Its precision-machined threads and secure sealing mechanism guarantee a tight, leak-proof closure, preventing fuel vapors from escaping while maintaining optimal pressure within the tank. The cap s sleek, vintage-inspired design, complete with the distinctive Cadillac crest or emblem, enhances the vehicle s classic appeal, making it a standout feature on the hood. Built to withstand the rigors of daily use, this cap is resistant to corrosion and wear, ensuring longevity even under demanding conditions. Whether you re preparing your Fleetwood for a weekend cruise, a show event, or a long-distance drive, the Gates SX-4377 delivers the reliability and performance you expect from a premium aftermarket solution. Its compatibility with both the **385 V8** and **429 V8** engines makes it an essential upgrade for enthusiasts seeking to preserve the authenticity and functionality of their beloved classic. With Gates reputation for quality and durability, this fuel tank cap is not just a replacement it s a statement of dedication to maintaining the legacy of one of America s most legendary automobiles.

**Pros and Cons of buying a Gates SX-4377 Fuel Tank Cap for a 1959 1964 Cadillac 60 Fleetwood (6.4L/7.0L V8)**

1. **OEM Fitment and Compatibility** The Gates SX-4377 is designed as an exact replacement for the original fuel tank cap on your 1959 1964 Cadillac 60 Fleetwood, ensuring proper sealing and functionality. This reduces the risk of fuel leaks or vapor loss, which is critical for maintaining engine performance and emissions compliance.

2. **High-Quality Materials** Gates is a reputable manufacturer known for durable, corrosion-resistant components. The cap is likely made from metal (likely aluminum or steel) with a rubber or silicone gasket, providing a tight seal that resists wear over time.

3. **Easy Installation** As an aftermarket replacement, the SX-4377 should be straightforward to install, requiring only basic tools. The design matches the original, so no modifications to the fuel tank or surrounding area are needed.

4. **Cost-Effective Solution** Compared to sourcing an original OEM cap (which may be difficult or expensive to find), the Gates part offers a reliable alternative at a reasonable price. This avoids the hassle of searching for vintage or hard-to-find parts.

5. **Compatibility with Modern Standards** The cap likely includes a modern fuel vapor valve system (if applicable), which helps meet emissions regulations. This ensures the vehicle operates efficiently without excessive fuel vapor escaping into the atmosphere.

6. **Aesthetic Match** The design closely resembles the original, preserving the classic look of your Fleetwood without requiring a full restoration of the fuel tank area.

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1. **Potential for Counterfeit or Low-Quality Parts** While Gates is a trusted brand, there is a risk of purchasing a counterfeit or inferior knockoff, especially if buying from unverified sellers. Always verify the authenticity of the part and the seller s reputation.

2. **Seal Wear Over Time** Even high-quality caps can degrade with age, especially if exposed to harsh conditions (e.g., extreme heat, cold, or fuel additives). The gasket may eventually need replacement, requiring additional maintenance.

3. **Fuel Vapor Valve Issues** If the cap includes a fuel vapor valve (common in modern applications), it may not function perfectly with older vehicles, potentially leading to minor fuel odor or vapor leaks. However, this is less likely with a well-designed Gates part.

4. **Limited Availability of Original Parts** While the Gates cap is a good replacement, some collectors or purists may prefer an original OEM cap for authenticity. However, original parts for this era are often scarce and expensive, making the Gates option a practical compromise.

5. **Price Sensitivity** Depending on where you purchase it, the Gates SX-4377 may be more expensive than generic aftermarket alternatives. However, the trade-off is reliability and fitment, which justify the cost for most owners.

6. **Installation Challenges** If the fuel tank or surrounding area is corroded or damaged, installing the cap may require additional work (e.g., cleaning, sealing, or replacing the tank flange). This could add to the overall cost and effort.

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### **Conclusion and Recommendation**

The **Gates SX-4377 fuel tank cap** is a **strong, practical choice** for your 1959 1964 Cadillac 60 Fleetwood. It offers **OEM-level compatibility, durability, and ease of installation**, making it ideal for both daily drivers and show cars where authenticity is secondary to functionality. The risks primarily related to counterfeit parts or long-term seal degradation can be mitigated by purchasing from a **reputable dealer or online retailer** (e.g., RockAuto, Summit Racing, or a trusted local parts store) and inspecting the part upon arrival.

- **Buy the Gates SX-4377** if you prioritize **reliability, ease of installation, and modern performance** over absolute originality.

- **Verify the seller s authenticity** to avoid counterfeit parts.

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

- **Consider a backup gasket** in case the original seal wears out prematurely.

For collectors or enthusiasts who demand **100% original parts**, sourcing an OEM cap may be worth the effort, but it is often more difficult and costly. In most cases, the Gates part provides an excellent balance of **quality, fitment, and value**.

Details:

Gates Fuel Tank Cap for 1959-1964 Cadillac Series 60 Fleetwood 6.4L 7.0L V8 uh: Status: In Stock.

part #: sx4377 prices

• $26.77-$33.16

specifications fueltanksysteme:

• for makes: Cadillac
• for years: 1959-1964
• brand: Gates
• mpn: Sx-4377
• 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: C180 28-64
• compatible model: Series 60 Fleetwood
• compatible year: 1964 1963 1962 1961 1960 1959
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

shipping fueltanksysteme:

• class: Standard, Expedited
• cost: $0.00
• transit: 4-6 Days
• type: Fixed
• service: Standard, Expedited

seller fueltanksysteme:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 660720

payments fueltanksysteme:

• wallet: Paypal
• other
• credit card: Discover

returns fueltanksysteme:

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

general fueltanksysteme:

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

offer fueltanksysteme:

• sold: 0
• quantity: 10
• started: May 24, 2026
• options: Ship-to-home
• availability: In Stock

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