Four Seasons 85109 Engine Coolant Water Outlet

Engine Coolant Water Outlet Overview

Four Seasons Water Outlet 85109 is an engine coolant water outlet for vehicles that need a direct replacement outlet housing without a thermostat. Built from aluminum and aluminum/cast iron construction, it includes a gasket or seal and meets or exceeds OEM requirements for fit and function. This part number 85109 is used across multiple applications, including Pontiac Grand Prix, Buick Regal, and Oldsmobile Cutlass models.

Key Features

• Engine coolant water outlet, style without thermostat
• Aluminum and aluminum/cast iron construction
• Gasket or seal included
• Meets or exceeds OEM specifications
• Inlet diameter: 0.995 in.
• Maximum height: 1.754 in.
• Bolt hole center to bolt hole center: 2.532 in. / 2.54 in.
• Mnt flange width: 0.388 in.

Detailed Description

The Four Seasons Water Outlet line focuses on engine coolant components that restore proper coolant routing at the thermostat housing area. Part number 85109 is an outlet-only design, so it is the correct choice when the thermostat is serviced separately or not part of the replacement requirement. Its aluminum construction and included seal support a precise OE-style replacement for cooling system repairs on Pontiac Grand Prix, Buick Regal, Oldsmobile Cutlass, and related applications.

This part cross-references Gates 28330 and Motorad CH3027 for the same application.

What It Helps Fix

• Coolant leaks at the water outlet or housing connection
• Cracked or corroded outlet housings
• Improper sealing at the coolant passage
• Cooling system service where the thermostat is not replaced
• Fitment issues caused by worn original outlet dimensions

Installation Notes and Tips

• Verify the inlet diameter, bolt spacing, and flange width before installation.
• Clean the mating surfaces thoroughly before fitting the included gasket or seal.
• Inspect adjacent coolant hoses and clamps while the outlet is removed.
• Confirm the thermostat is not required for your repair, since this outlet is sold without one.
• Use the vehicle-specific fitment below to confirm application on your model year.

Quality Assurance

Four Seasons lists this water outlet as meeting or exceeding OEM requirements. It is cataloged for direct replacement use on 1988-1993 Buick Regal, 1988-1993 Oldsmobile Cutlass, 1988-1993 Oldsmobile Cutlass Supreme, 1988-1993 Pontiac Grand Prix, 1990-1994 Chevrolet Lumina, 1990-1994 Oldsmobile Silhouette, and 1990-1995 Pontiac Trans Sport.

• Fits 1988-1993 Buick Regal, N/A
• Fits 1988-1993 Oldsmobile Cutlass, N/A
• Fits 1988-1993 Oldsmobile Cutlass Supreme, N/A
• Fits 1988-1993 Pontiac Grand Prix, N/A
• Fits 1990-1994 Chevrolet Lumina, N/A
• Fits 1990-1994 Oldsmobile Silhouette, N/A
• Fits 1990-1995 Pontiac Trans Sport, N/A