FORD SK603381 Coolant Reservoir Cap 842296125735 1.6

( Manufacturer Part Number: SK603381 ), ( Type: Collant Reservior ), ( Items Included: Cap ), ( UPC: 842296125735 ), ( Material: Plastic )

Review FORD Fomoco Oem 1.6 Coolant Reservoir Cap Part fits FIESTA 2011–2019

The **SK603381 Coolant Reservoir Cap** is a precision-engineered, high-performance replacement part designed specifically for the **2011 2019 Ford Fiesta models equipped with the 1.6L engine**, ensuring optimal cooling system functionality and long-term reliability. Crafted from durable **high-quality thermoplastic or reinforced polycarbonate**, this reservoir cap is engineered to withstand the extreme temperatures and pressure fluctuations inherent in modern automotive cooling systems, preventing leaks, overheating, and potential engine damage. Featuring a **tight-sealing, spring-loaded mechanism**, it maintains consistent pressure within the cooling circuit, reducing the risk of coolant evaporation and air ingestion that can lead to inefficient heat dissipation or even coolant system failure. The cap is also equipped with an **integrated pressure relief valve**, allowing excess pressure to escape safely while preventing vacuum-induced coolant loss when the engine cools, thus protecting the radiator and hoses from damage. Compatible with the **Ford Fiesta s 1.6L engine cooling system**, this cap is a direct-fit replacement for the original equipment manufacturer (OEM) component, ensuring a perfect match in terms of size, thread pattern, and mounting configuration. Whether you're performing routine maintenance, addressing a coolant leak, or upgrading your vehicle s cooling system for enhanced durability, this reservoir cap delivers the performance and reliability expected from a genuine Ford part. Its robust construction and precise engineering make it an essential component for maintaining peak engine performance and preventing costly repairs associated with cooling system malfunctions.

### **Pros and Cons of Buying a Replacement Coolant Reservoir Cap (SK603381) for a 2011 2019 Ford Fiesta 1.6**

1. **Direct Fitment** The SK603381 is a genuine or high-quality aftermarket replacement designed specifically for your 2011 2019 Ford Fiesta 1.6, ensuring compatibility with the engine bay layout and mounting points.

2. **Prevents Coolant Leaks** A faulty or damaged reservoir cap can cause coolant leaks, overheating, or pressure loss. Replacing it with a new, sealed cap restores proper engine cooling system function.

3. **Pressure Regulation** The cap maintains the correct pressure in the cooling system, preventing coolant from boiling over or evaporating too quickly, which improves engine efficiency and longevity.

4. **Cost-Effective** Replacing just the cap is significantly cheaper than overhauling the entire cooling system or dealing with engine damage from overheating.

5. **Easy Installation** The part is straightforward to install, requiring only basic tools (screwdriver or socket set) and minimal time (10 30 minutes).

6. **Extended Coolant Life** A properly sealed cap reduces air intake, which helps maintain coolant purity and reduces the need for frequent flushes.

7. **Warranty Coverage (if applicable)** Some aftermarket brands offer warranties, and if purchased from a reputable seller, you may get a return or replacement if the part fails prematurely.

1. **Potential Counterfeit Parts** If buying from an untrusted seller (especially online marketplaces), there s a risk of receiving a low-quality or fake part that may fail quickly or not fit properly.

2. **Mismatched Pressure Rating** Some aftermarket caps may not match the exact pressure specification of the original, leading to cooling system inefficiencies or leaks if the pressure is too high or too low.

3. **Additional Costs** If the cooling system has been neglected, you may need to flush the coolant afterward, adding to the expense.

4. **DIY Risk** While simple, improper installation (e.g., overtightening or cross-threading) could damage the reservoir or cap threads, requiring further repairs.

5. **Limited Lifespan** Even a new cap may degrade over time due to heat, coolant chemicals, or vibration, though it should last the lifespan of the vehicle if properly maintained.

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### **Conclusion**

The SK603381 coolant reservoir cap is a **necessary and cost-effective replacement** for a failing or damaged part in your Ford Fiesta 1.6. The benefits such as preventing leaks, maintaining cooling system pressure, and avoiding costly engine damage far outweigh the minor risks, provided you purchase from a reliable source. The installation is straightforward, making it a practical DIY job for most owners.

If you re experiencing symptoms like coolant loss, overheating, or a hissing sound from the reservoir, replacing the cap is a **proactive and inexpensive fix** that should be prioritized. However, if the cooling system has been neglected for years, consider flushing the coolant afterward to ensure optimal performance.

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### **Recommendation**

1. **Purchase from a trusted source** Buy the part from an authorized Ford dealer, reputable online retailer (e.g., Amazon, RockAuto, or local auto parts stores with return policies), or a well-reviewed aftermarket supplier.

2. **Verify compatibility** Double-check that the SK603381 matches your exact model year and engine variant (1.6 Duratec in this case).

3. **Inspect the cooling system** While replacing the cap, visually inspect the reservoir, hoses, and radiator for cracks, corrosion, or leaks. Replace any damaged components if found.

4. **Use the correct coolant** If flushing the system, use the recommended coolant (Ford s extended-life coolant or a compatible OAT-type) to avoid future issues.

5. **Test after installation** Start the engine and monitor for leaks, proper pressure buildup (cap should click securely), and stable temperature readings.

**Final Verdict:** **Buy and install the SK603381 cap** as soon as possible if you suspect it s faulty. It s a small investment with significant long-term benefits for your engine s health.

Details:

Vehicle Fitment: 2015 Ford Fiesta SE. I take multiple high-resolution pictures from different angles, including any imperfections, labels, part numbers, and signs of wear. Please review all photos and ask questions before buying. Broken tab shown.

Wrong part sent. Check my other listings for matching items. Condition: Used Pulled from a running 2015 Ford Fiesta SE. Buyer pays return shipping unless error on my end.

Also fits: 2011 2019 Fiesta S/SE/Titanium non-ST.

part #: sk603381 prices

• $30.04-$40.95

specifications cylinderheapar:

• for models: Fiesta
• for makes: Ford
• for years: 2011-2019
• mpn: Sk603381
• type: Collant Reservior
• items included: Cap
• upc: 842296125735
• material: Plastic

offer cylinderheapar:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: March 11, 2026
• sold: 0

payments cylinderheapar:

• other
• wallet: Paypal
• credit card: Discover

seller cylinderheapar:

• # reviews: 513
• city: Hollywood, Florida
• rating: 100.0%

general cylinderheapar:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

returns cylinderheapar:

• policy: No Returns

shipping cylinderheapar:

• cost: $17.65
• type: Calculated
• class: Standard, Expedited
• carrier: USPS, UPS, FedEx
• transit: 5-8 Days
• service: USPS Ground Advantage, UPS Ground, FedEx Ground / FedEx Home Delivery, USPS Priority Mail

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