Gates 31540 Radiator Cap

Reliable Radiator Cap for Mercedes-Benz Vehicles

The Gates OE Type Radiator Cap 31540 is engineered to maintain optimal pressure in your cooling system. Designed specifically for a wide range of Mercedes-Benz models, this threaded coolant bottle cap ensures a secure seal and consistent performance under varying operating conditions.

• Threaded coolant bottle cap design for secure fitment
• Pressure rating of 21 psi (18-22 psi SAE range) to maintain system integrity
• Compatible with closed coolant recovery systems
• Precise dimensions: 1.18 inch cap depth, 1.64 inch filler neck inside diameter, 2.75 inch filler neck outside diameter
• OE performance rating for reliable replacement

About the Gates OE Type Radiator Cap Product Line

The OE Type Radiator Cap line from Gates focuses on delivering radiator caps that meet original equipment specifications. This ensures compatibility and performance consistency with factory-installed components. The 31540 cap is part of this line, providing a threaded design that matches the original coolant bottle cap used in many Mercedes-Benz vehicles, supporting closed coolant recovery systems and maintaining proper pressure levels.

Product Details and Specifications

The Gates 31540 radiator cap features a threaded design with a cap depth of 1.18 inches and a filler neck inside diameter of 1.64 inches, ensuring a precise fit. The filler neck outside diameter measures 2.75 inches, accommodating the specific dimensions required for proper sealing. Rated at 21 psi, this cap maintains the pressure within the closed coolant recovery system, preventing coolant loss and overheating. Its shell diameter is 2.74 inches, aligning with OEM standards for Mercedes-Benz models.

Compatible Mercedes-Benz Models and Applications

• Compatible with Mercedes-Benz models including A180, A220, AMG GT series, C-Class (C180, C300, C63 AMG), E-Class (E250, E350, E63 AMG), G-Class (G500, G63 AMG), GLS, GLE, CLA, CLS, SL, and Maybach series
• Suitable for vehicles equipped with closed coolant recovery systems requiring a threaded coolant bottle cap
• Applicable for various AMG performance models and Sprinter vans

Common Cooling System Issues Addressed

• Prevents coolant leakage due to improper sealing
• Maintains correct system pressure to avoid overheating
• Ensures proper coolant recovery in closed systems
• Replaces worn or damaged radiator caps to restore cooling efficiency
• Helps prevent air entry that can cause corrosion or system failure

Installation Notes and Tips

When installing the Gates 31540 radiator cap, ensure the filler neck is clean and free of debris. Align the threaded cap carefully and tighten securely to maintain the pressure rating of 21 psi. Avoid overtightening to prevent damage to the cap or filler neck threads. Regular inspection of the cap and cooling system is recommended to maintain optimal performance.

Quality Assurance and Warranty

Gates OE Type Radiator Caps are manufactured to meet original equipment standards, ensuring reliable performance and durability. The 31540 cap is tested for pressure retention and fitment accuracy. While specific warranty details are not provided, Gates products typically adhere to industry quality controls and standards for automotive cooling components.