Four Seasons 85231 Engine Coolant Water Inlet

Engine Coolant Water Inlet for Nissan and INFINITI

Four Seasons Water Inlet 85231 is an engine coolant inlet built for specific Nissan and INFINITI applications. It is a steel, OE-style replacement that meets or exceeds OEM requirements and is supplied without a thermostat or gasket/seal.

Compatible With 1984-2004 Nissan and INFINITI cooling system applications, including Nissan Frontier, Xterra, Pathfinder, Pickup, D21, 300ZX, 200SX, and INFINITI QX4 and M30. Four Seasons 85231 is a direct-fit water inlet for engine coolant service where the original inlet has corroded, warped, or begun leaking.

Key Features

• Steel construction for cooling system durability
• OE-style engine coolant water inlet, style without thermostat
• Meets or exceeds OEM specifications
• Inlet diameter: 1.479 in.
• Bolt hole center to bolt hole center: 2.6875 in.
• Maximum height: 2.399 in.
• Mounting flange width: 0.286 in.
• Gasket or seal not included
• Thermostat not included

Product Details

Four Seasons Water Inlet 85231 is part of the Water Inlet line and is intended for engine coolant component replacement where a steel inlet housing is required. The part number 85231 is cross-referenced with Motorad 5231KT and Valeo 815535 for the same application. This inlet is used on Nissan Frontier and Nissan Xterra cooling system service, as well as Pathfinder, D21, 300ZX, 200SX, Pickup, and INFINITI QX4 and M30 applications listed in the fitment data.

Common Issues This Part Can Address

• Coolant seepage at the inlet housing
• Corrosion or rust damage in the original steel inlet
• Warped or damaged mounting surfaces
• Cooling system leaks at the thermostat housing area when the inlet is the failed component
• Improper sealing from a worn original inlet

Installation Notes

• Verify engine coolant inlet dimensions and bolt spacing before installation.
• Inspect the mating surface and replace any damaged sealing components as needed, since gasket or seal is not included.
• Confirm thermostat requirements for the vehicle, because this inlet is supplied without a thermostat.
• Drain coolant before removing the original inlet and refill the system after installation.
• Use the vehicle-specific fitment listing to confirm application on Nissan Frontier, Xterra, Pathfinder, D21, 300ZX, 200SX, Pickup, QX4, or M30.

Quality Assurance

Four Seasons 85231 is manufactured to meet or exceed OEM specifications for the listed applications. Four Seasons Water Inlet parts are built for direct replacement use in cooling system service, with fitment coverage spanning 1984-2004 Nissan and INFINITI models.