GATES SX-8728 Fuel Tank Gas Cap Storage Air Sj 1.8L

( Brand: Gates ), ( Manufacturer Part Number: SX-8728 ), ( 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: C447 42-25 ), ( Compatible Model: Rx ), ( Compatible Year: 1986 1985 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Gates Fuel Tank Cap )

Review GATES Fuel Tank Cap Subaru 1.8l Gas Delivery Storage Air Sj fits H4 RX 1985–1986

The **Gates SX-8728 Fuel Tank Cap** is a meticulously engineered replacement part designed specifically for the 1985 1986 Subaru RX 1.8L H4 engine models, including the iconic **GL, L, and Limited** trim levels, as well as the **Air SJ** variant. Crafted from high-quality, durable materials, this fuel tank cap ensures a secure and reliable seal while maintaining optimal fuel vapor containment, reducing evaporative emissions, and preventing fuel odors from escaping into the cabin. The cap features a **precision-molded rubber gasket** that conforms perfectly to the fuel filler neck, eliminating leaks and maintaining a tight, airtight closure even under varying temperature conditions. Its **durable plastic housing** is resistant to UV degradation, ensuring long-term performance without warping or cracking, even after years of exposure to harsh weather elements. The cap s **threaded design** is engineered to match the exact specifications of the original equipment manufacturer (OEM), providing a snug, vibration-resistant fit that prevents rattling or loosening over time. Beyond its functional benefits, the Gates SX-8728 also enhances the aesthetic appeal of your Subaru, as it replicates the styling of the factory cap with a clean, sleek finish that blends seamlessly with the vehicle s exterior. Whether you re restoring an original RX or maintaining a well-loved classic, this cap delivers both performance and peace of mind, ensuring your fuel system operates efficiently while keeping your Subaru running smoothly for miles to come.

### Pros and Cons of buying a Gates SX-8728 Fuel Tank Cap for a 1985-1986 Subaru RX 1.8L H4

1. **Compatibility** The Gates SX-8728 is specifically designed for the 1985-1986 Subaru RX with a 1.8L H4 engine, ensuring a proper fit without modifications. This reduces the risk of leaks or improper sealing.

2. **Quality Construction** Gates is a well-known brand in automotive parts, particularly for fuel system components. Their products are generally durable and designed to meet or exceed OEM standards, which can improve longevity compared to generic or aftermarket alternatives.

3. **Sealing Performance** A properly functioning fuel cap ensures a tight seal, preventing fuel vapors from escaping and maintaining proper fuel pressure. This can help avoid fuel system issues like rough idling, poor performance, or even triggering the check engine light due to an EVAP system leak.

4. **EVAP System Compliance** Modern vehicles, including older ones with emissions systems like the Subaru RX, rely on a functioning EVAP system. A faulty or loose cap can disrupt this system, leading to emissions-related problems and potential failure of emissions tests.

5. **Easy Installation** The cap is designed to be a direct replacement, meaning it should install similarly to the original. Most users report that it can be replaced in under 10 minutes with basic tools, making it a straightforward DIY project.

6. **Prevents Contamination** A secure fuel cap keeps debris, moisture, and contaminants out of the fuel tank, which can prolong the life of the fuel system and prevent issues like clogged fuel filters or injector problems.

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1. **Cost** Compared to generic or no-name fuel caps, the Gates SX-8728 is more expensive. While it s a premium product, the price may be a deterrent for budget-conscious buyers who opt for cheaper alternatives, which might not last as long.

2. **Potential Overkill for Minor Issues** If the original cap was only slightly loose or worn but not completely failing, replacing it with a Gates cap might be unnecessary. In such cases, a simpler or cheaper replacement could suffice.

3. **Availability and Lead Times** Depending on the retailer, the Gates SX-8728 might not always be in stock, requiring online ordering or waiting for delivery. Generic caps are often immediately available from local auto parts stores.

4. **Misalignment Risk** If the fuel tank or filler neck has been damaged or modified in the past, the new cap might not seat properly. This could lead to leaks or a poor seal despite the cap being high-quality.

5. **No Significant Aesthetic Improvement** Unlike some aftermarket parts, the Gates cap is a functional replacement and does not offer any styling benefits. If appearance is a concern, the original or a generic cap will look identical.

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The Gates SX-8728 fuel tank cap is a reliable and high-quality choice for a 1985-1986 Subaru RX 1.8L H4, offering superior sealing and durability compared to generic alternatives. Its compatibility, brand reputation, and role in maintaining the EVAP system make it a strong investment if you suspect or confirm a failing fuel cap. However, if the issue is minor or you re on a tight budget, a generic OEM replacement might be sufficient.

For most owners experiencing symptoms like fuel smell, check engine lights related to the EVAP system, or difficulty starting the vehicle, the Gates cap is a worthwhile upgrade. It s particularly recommended if you prioritize longevity, emissions compliance, and peace of mind over cost savings.

If you re replacing the fuel cap due to a confirmed leak, EVAP system issue, or general wear, **purchase the Gates SX-8728**. Its quality justifies the higher cost, and it will likely outlast cheaper alternatives. If the original cap is only slightly damaged or you re unsure whether it s the root cause of your issues, consider testing a generic cap first. Always ensure the filler neck and surrounding area are clean and undamaged during installation to guarantee a proper seal.

Details:

Gates Fuel Tank Cap for 1985 - 1986 Subaru RX 1.8L H4 Gas Delivery storage Air sj: Status: In Stock.

part #: sx8728 prices

• $29.07-$32.28

specifications fueltanksysteme:

• for models: H4, Rx
• for makes: Subaru
• for years: 1985-1986
• brand: Gates
• mpn: Sx-8728
• 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: C447 42-25
• compatible model: Rx
• compatible year: 1986 1985
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Gates Fuel Tank Cap

seller fueltanksysteme:

• city: Indianapolis, Indiana
• # reviews: 663438
• rating: 99.7%

shipping fueltanksysteme:

• transit: 2-6 Days
• service: Standard, Expedited
• class: Standard, Expedited
• cost: $0.00
• type: Fixed

payments fueltanksysteme:

• wallet: Paypal
• other
• credit card: Discover

general fueltanksysteme:

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

offer fueltanksysteme:

• availability: In Stock
• quantity: 10
• started: June 2, 2026
• options: Ship-to-home
• sold: 0

returns fueltanksysteme:

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

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