Four Seasons 84890 Engine Coolant Water Outlet

Engine Coolant Water Outlet for Classic GM Applications

Four Seasons 84890 is an engine coolant water outlet built for select Chevrolet and GMC vehicles from 1973-1985. It is a direct-fit style outlet with the gasket or seal included, making it a practical replacement for worn or leaking cooling system components.

Use this Four Seasons Water Outlet when servicing classic Chevrolet C10, C20, K20, Camaro, Caprice, and GMC C2500 or K2500 applications that call for an outlet without a thermostat. The 84890 part number is also a useful reference when searching for OE-style cooling system replacement parts.

Key Features

• Brand: Four Seasons Water Outlet
• Part number: 84890
• Engine coolant water outlet, outlet style
• Thermostat not included
• Gasket or seal included
• Material: aluminum / cast iron
• Meets or exceeds OEM requirements
• Inlet diameter: 1.213 in.
• Bolt hole center to bolt hole center: 3.250 in.
• Maximum height: 2.400 in.
• Mounting flange width: 0.425 in.

Product Details

Four Seasons 84890 is part of the Water Outlet line and is intended for engine coolant routing at the cylinder head or outlet connection point, depending on application. Its OE-matching dimensions and included seal support a proper fit on many Chevrolet and GMC trucks, vans, and passenger cars, including 1978-1979 Chevrolet Camaro, 1977-1979 Chevrolet Caprice, 1978 Chevrolet C10, and 1979-1980 GMC C1500. This part cross-references Anchor 9594 for the same application.

Common Problems This Part Can Address

• Coolant leakage at the water outlet housing
• Corrosion or cracking in the original outlet
• Improper sealing at the coolant connection
• Fitment issues from a worn or distorted housing
• Cooling system service on vehicles that use an outlet without a thermostat

Installation Notes and Tips

Verify the inlet diameter, bolt spacing, and mounting flange dimensions before installation. Clean the mating surfaces thoroughly, inspect the thermostat location if your application uses one elsewhere in the system, and confirm the gasket or seal seats evenly before tightening fasteners to the vehicle manufacturer’s specification. For fitment, this part is listed for applications such as Fits 1978 Chevrolet C10, N/A and Fits 1979-1985 Chevrolet C20, N/A, along with multiple Chevrolet and GMC truck, van, and car models from the 1973-1985 range.

Quality Assurance

Four Seasons lists this water outlet as meeting or exceeding OEM requirements, giving buyers an OE-style replacement option for classic Chevrolet and GMC cooling system repairs. The Four Seasons 84890 part number is commonly used when cross-checking cooling system service parts for these older GM applications.