Gates 31522 Radiator Cap

OE Type Radiator Cap for Cooling System Control

The Gates 31522 OE Type Radiator Cap is built for accurate cooling system pressure control on a wide range of Chrysler, Dodge, Jeep, BMW, and Mercedes-Benz applications. With a 20 psi pressure rating and OE performance comparison, it supports proper coolant system sealing for vehicles such as the Dodge Challenger, Jeep Grand Cherokee, and Mercedes-Benz S600.

Key Features

• Standard radiator cap design with OE Type fit and function
• 20 psi pressure rating with an SAE pressure range of 18-22 psi
• Corrosion-resistant metal or high-quality plastic construction, depending on application
• 1.25 in cap depth, 2.33 in shell diameter, and 1.61 in filler neck inside diameter
• Fits filler necks with 2.13 in outside diameter and 0.75 in filler neck depth
• Optional coolant recovery system application
• Manufactured to meet or exceed OEM specifications in form, fit, and function

Product Details

Gates OE Type Radiator Cap 31522 is engineered to maintain the correct pressure level in the radiator and cooling system, helping preserve stable operating conditions. The Gates OE Type Radiator Cap line is built for long service life and consistent pressure control, using corrosion-resistant materials selected for the application. This part cross-references Dorman - HELP 46027 and Carlson 7020 for the same application.

Compatible With select 1981-2014 Chrysler, Dodge, Jeep, BMW, and Mercedes-Benz vehicles, including 2012-2014 Chrysler 300, 2011-2014 Dodge Challenger, 2014 Jeep Grand Cherokee, and multiple Mercedes-Benz S-Class, SL-Class, and E-Class models. The Gates 31522 radiator cap is also listed for BMW M3, M5, M6, and 524td applications.

What It Helps Address

• Loss of radiator pressure from a worn or weak cap
• Coolant overflow or improper coolant recovery operation
• Pressure-related cooling system instability
• Seal wear at the filler neck interface
• Replacement needs for OE-style radiator cap service

Installation Notes and Tips

Verify filler neck dimensions, cap depth, and pressure rating before installation. This cap is specified for 20 psi applications and should be matched to the vehicle’s cooling system requirements. Confirm whether the vehicle uses an optional coolant recovery system and inspect the radiator neck sealing surface for damage or corrosion before installing Gates 31522.

Quality Assurance

Gates manufactures this radiator pressure cap to meet or exceed OEM specifications in function, form, and fit. The design uses corrosion-resistant materials and is intended to provide accurate pressure control for OE-style cooling system service.