GATES SX-4985 Fuel Tank Gas Cap Jb PB150 3.7L 5.2L L6 V8

( Brand: Gates ), ( Manufacturer Part Number: SX-4985 ), ( 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: C274 57-17 ), ( Compatible Model: Pb150 ), ( Compatible Year: 1983 1982 ), ( 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 L6 V8 Gas Jb fits 1982–1983

The **Gates SX-4985 Fuel Tank Cap** is a meticulously engineered replacement part designed specifically for the 1982 1983 Plymouth PB150 models equipped with either the robust **3.7L inline-six (I6)** or the high-performance **5.2L V8** engines, both running on gasoline. Crafted with precision and built to exacting standards, this fuel tank cap ensures a secure, leak-proof seal while maintaining the integrity of your vehicle s fuel system. The cap features a **durable, corrosion-resistant construction**, typically made from high-grade plastic reinforced with fiber to withstand the harsh conditions of road travel, including exposure to UV rays, temperature fluctuations, and fuel vapors. Its **threaded design** is engineered to match the original equipment manufacturer (OEM) specifications, guaranteeing a snug fit on the fuel filler neck, preventing fuel spills and reducing the risk of vapor leaks that could contribute to environmental pollution or engine performance issues.

Beyond its functional reliability, the Gates SX-4985 stands out for its **user-friendly design**, incorporating a **smooth, ergonomic grip** that allows for easy installation and removal, even in tight or awkward positions. The cap is also equipped with a **vapor-tight sealing mechanism**, often featuring a rubber gasket or O-ring that creates an airtight barrier, helping to maintain optimal fuel pressure and reducing evaporative emissions. This is particularly important for vehicles like the PB150, which may be subject to stricter emissions regulations or used in applications where fuel efficiency and performance are critical. Whether you re restoring a classic Plymouth for weekend cruising or maintaining a high-mileage workhorse, this replacement cap ensures that your fuel system operates smoothly, free from leaks or malfunctions that could disrupt your driving experience.

For enthusiasts and mechanics alike, the Gates brand is synonymous with quality and durability, and the SX-4985 is no exception. It is a **direct-fit replacement**, meaning no modifications or additional tools are required for installation, making it an ideal choice for both DIYers and professional technicians. The cap s compatibility extends beyond just the PB150, often serving as a reliable solution for other Chrysler-based vehicles from the early 1980s, ensuring broad usability without compromising on performance. With its blend of **practicality, longevity, and compatibility**, the Gates SX-4985 fuel tank cap is an essential component for anyone looking to preserve the functionality and aesthetic integrity of their 1982 1983 Plymouth.

**Pros and Cons of buying a Gates SX-4985 Fuel Tank Cap for a 1982-1983 Plymouth PB150 (3.7L, 5.2L, or V8 Engine)**

1. **Direct Fitment** The Gates SX-4985 is specifically designed for your 1982-1983 Plymouth PB150, ensuring compatibility with the fuel tank s venting system and mounting points. This reduces the risk of installation errors or leaks that could occur with an aftermarket or generic replacement.

2. **Quality Construction** Gates is a well-known brand in automotive aftermarket parts, particularly for fuel system components. The SX-4985 is made from durable materials, including a sturdy plastic body and a reliable metal or reinforced gasket to prevent fuel vapors from escaping.

3. **Proper Venting Functionality** The cap includes an internal venting mechanism that helps regulate fuel tank pressure, reducing the risk of vapor lock or fuel starvation during driving. This is especially important for older vehicles with less refined fuel systems.

4. **Easy Installation** The design is straightforward, requiring minimal tools (typically just a screwdriver or socket) to remove the old cap and install the new one. No modifications to the fuel tank are usually necessary.

5. **Prevents Fuel Evaporation** A properly sealed fuel cap minimizes fuel evaporation, which can lead to reduced fuel efficiency and potential engine performance issues over time.

6. **Cost-Effective Solution** Compared to more specialized or high-end aftermarket caps, the Gates SX-4985 offers a balance of affordability and reliability. It s often priced reasonably, making it a practical choice for DIYers.

7. **Prevents Check Engine Light (CEL) Triggers** A loose or missing fuel cap is a common cause of a "check engine" light due to improper fuel tank pressure readings from the EVAP system. Replacing it with a proper cap can resolve this issue.

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1. **Potential for Counterfeit or Low-Quality Copies** Since Gates parts are widely available, there is a risk of purchasing a counterfeit or inferior knockoff, especially if buying from untrusted online sellers. Always verify the seller s reputation and product authenticity.

2. **Limited Availability in Some Regions** Depending on where you purchase it, the Gates SX-4985 may not be as easily accessible as other generic or aftermarket options. You may need to order it online or visit a specialty auto parts store.

3. **No Additional Features** Unlike some high-end or performance-oriented fuel caps, the Gates SX-4985 does not include advanced features such as pressure relief valves for extreme conditions or enhanced sealing for high-performance applications. For most daily drivers, this is unnecessary, but enthusiasts might prefer a more robust option.

4. **Wear Over Time** While durable, the gasket or internal components of the cap can degrade over time, especially if exposed to fuel additives, moisture, or extreme temperatures. Regular inspection and replacement (every few years) may be advisable.

5. **No Universal Fit for All Years** While it fits your specific model years (1982-1983), it may not work for other Plymouth or Dodge trucks from slightly different model years or with significant modifications (e.g., aftermarket fuel tanks).

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The Gates SX-4985 fuel tank cap is a **reliable, direct-fit replacement** for your 1982-1983 Plymouth PB150, offering a balance of quality, ease of installation, and functionality. It addresses common issues like fuel evaporation, check engine light triggers, and improper venting without requiring extensive modifications. However, buyers should ensure they purchase an **authentic Gates product** to avoid counterfeit items and verify compatibility with their specific engine configuration (3.7L, 5.2L, or V8).

For most owners, this cap is a **practical and cost-effective solution** that extends the life of the fuel system and improves overall vehicle performance. If you re comfortable with basic maintenance, installing it yourself is straightforward and saves on labor costs.

- **Buy from a trusted source** (e.g., RockAuto, Amazon with verified seller ratings, or a local auto parts store with a return policy).

- **Inspect the cap upon arrival** for signs of damage or counterfeiting (e.g., poor packaging, misspellings, or subpar materials).

- **Replace the cap if you notice leaks, cracks, or a loose fit** during installation.

- **Consider keeping a spare** in case of future issues, as fuel caps can wear out over time.

If your primary concern is **long-term durability or performance**, you might explore higher-end options (e.g., from brands like **Spectre Performance** or **EcoFuel**), but for standard use, the Gates SX-4985 is an excellent choice.

Details:

Gates Fuel Tank Cap for 1982 - 1983 Plymouth PB150 3.7L 5.2L L6 V8 Gas jb: Status: In Stock.

part #: sx4985 prices

• $24.00-$38.28

specifications fueltanksysteme:

• for makes: Plymouth
• for years: 1982-1983
• brand: Gates
• mpn: Sx-4985
• 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: C274 57-17
• compatible model: Pb150
• compatible year: 1983 1982
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

general fueltanksysteme:

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

returns fueltanksysteme:

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

seller fueltanksysteme:

• city: Indianapolis, Indiana
• rating: 99.7%
• # reviews: 663166

payments fueltanksysteme:

• other
• credit card: Diners-club
• wallet: Apple-pay

shipping fueltanksysteme:

• class: Standard, Expedited
• type: Fixed
• service: Standard, Expedited
• cost: $0.00
• transit: 4-7 Days

offer fueltanksysteme:

• quantity: 10
• options: Ship-to-home
• started: May 30, 2026
• availability: In Stock
• sold: 0

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