Gates 31428 Engine Cooling System Pressure Tester Adapter - Intercooler or Radiator

Cooling System Adapter for Pressure Testing

The Gates 31428 radiator cap and cooling system tester adapter is used with a radiator cap/cooling system tester to connect to multiple component sizes. This cooling system adapter features a 32mm I.D. x 16mm deep cam-on design for specific service applications across a wide range of vehicles, including Subaru Legacy, Subaru Outback, Nissan Altima, and Hyundai Elantra.

Key Features

• Cooling system adapter for use with a radiator cap and cooling system tester
• 32mm I.D. x 16mm deep cam-on configuration
• Supports testing across multiple radiator cap and cooling system component sizes
• Gates part number 31428 for service identification
• Cross-reference: Dorman - HELP 46820 for the same application

Product Details

Gates 31428 is a radiator cap/cooling system tester adapter built for pressure testing service work on a broad range of import and domestic vehicles. It is part of the Gates radiator cap/cooling system tester adapter line, which provides application-specific adapters used to connect the tester to different cooling system openings and cap styles. This adapter is listed for many Subaru, Nissan, Kia, Hyundai, Mazda, Ford, and INFINITI applications, including Subaru Forester, Nissan Rogue, and Mazda CX-5 service coverage.

Use Gates 31428 when you need a tester adapter that matches the specified 32mm I.D. x 16mm deep cam-on profile. The part number 31428 is also referenced in interchange listings for service lookup and catalog matching.

Common Problems This Adapter Helps Diagnose

• Cooling system pressure loss during radiator cap testing
• Leaks at the radiator neck or cap interface
• Faults found during coolant system pressure checks
• Incorrect tester connection caused by mismatched adapter size
• Service delays when testing Subaru, Nissan, Hyundai, Kia, or Mazda cooling systems

Installation Notes and Tips

• Use with a compatible radiator cap/cooling system tester only
• Verify the adapter profile matches the vehicle’s cooling system opening before testing
• Confirm the application by year, make, model, and position in the fitment list
• Fits 2020-2025 Subaru Legacy, N/A
• Fits 1997-2018 Nissan Altima, N/A
• Fits 2013-2020 Mazda CX-5, N/A

Quality Assurance

Gates supplies this adapter as a service tool component for cooling system pressure testing. Part number 31428 is cataloged for broad application coverage and interchange lookup, including Gates 12027 and Dorman - HELP 46820.