Gates 31518 Radiator Cap

Gates Safety Release Radiator Cap 31518

The Gates Safety Release Radiator Cap 31518 is a 16 psi radiator cap built for vehicles that use a cam-on, vented safety-release design. Its release lever helps direct steam through the overflow tube, adding a safer way to relieve pressure during cooling system service.

With a stainless steel finish, OE Exact comparison rating, and optional coolant recovery system support, this Gates radiator cap is a direct-fit replacement for many Chrysler, Dodge, Jeep, Ram, and select domestic applications. It is a practical choice for drivers searching for a 16 psi radiator cap for Ram 1500, Dodge Charger, or Jeep Wrangler fitment.

Key Features

• Part number 31518
• 16 psi pressure rating with SAE pressure range of 14-18 psi
• Safety release lever helps vent steam through the overflow tube
• Cam-on attachment type for secure installation
• Stainless steel cap finish with silver color
• Vented design with quick pressure release
• OE Exact comparison rating
• Compatible with optional coolant recovery systems

Product Details

Gates Safety Release Radiator Caps are built for controlled pressure relief in the cooling system. This design helps reduce the risk of accidental burns when the cap is opened after the engine has reached operating temperature. The 31518 uses a cam-on attachment and measures 2.25 inches wide with a 1.48-inch cap depth and height, plus a 2.61-inch shell diameter.

This radiator cap is specified for a 16 psi system and matches a wide range of fitments, including 2011-2021 Chrysler 300, 2011-2021 Ram 1500, 2015-2018 Jeep Wrangler, and 2011-2018 Dodge Charger. It also cross-references Dorman - HELP 46063 for the same application.

Common Cooling System Issues It Can Address

• Loss of radiator pressure from a worn or weak cap
• Steam release concerns during cooling system checks
• Coolant overflow caused by a cap that no longer seals properly
• Pressure instability in a 16 psi cooling system
• Fitment problems when replacing an OE-style cam-on radiator cap

Installation Notes and Tips

• Verify the filler neck inside diameter is 1.61 inches (41 mm) before installation.
• Confirm the filler neck outside diameter is 2.13 inches (54 mm).
• Check hood clearance on applications where space is limited.
• Inspect the radiator neck and sealing surfaces for damage before installing the cap.
• Use only on vehicles specified for a 16 psi pressure rating.

Quality Assurance

Gates is known for OE-style cooling system components, and this cap carries an OE Exact comparison rating. Part number 31518 is built to match the listed pressure and dimensional requirements for confirmed applications across Chrysler, Dodge, Jeep, Ram, and related fitments.