One Stop Solutions 1998 Radiator

OE-Style Cooling for Toyota 4Runner

This OSC Premium New Automotive Radiator is built for the 1996-2002 Toyota 4Runner and engineered for OES form and function. Part number 1998 is a direct-fit radiator with a downflow design, plastic tanks, and a premium aluminum core for dependable cooling performance.

It is a fit for Toyota 4Runner owners looking for a radiator replacement that matches factory dimensions and cooling layout while addressing common wear points in higher-mileage vehicles.

Key Features

• Fits 1996-2002 Toyota 4Runner, N/A
• Part number 1998
• Downflow radiator design with a 1-row core
• Plastic tank construction with PA core material
• Transmission oil cooler included with concentric cooler type
• Premium-grade tubes, fins, headers, and tanks for added durability
• Die-cut gasket design for leak resistance
• Individually pressure tested during production
• Factory-style fit, form, and function

Detailed Description

OSC Premium New Automotive Radiator 1998 is engineered to match original equipment cooling layout for the Toyota 4Runner. The radiator uses a 22 5/8-inch core height, 25 1/8-inch core width, and 1-inch core thickness, with 1 3/8-inch inlet and outlet diameters. It also includes a concentric transmission oil cooler and is built with premium materials selected for long service life and stable cooling performance.

For 1996-2002 Toyota 4Runner applications, this radiator is designed to support proper coolant flow, consistent heat transfer, and a clean drop-in fit. OSC also uses engineering updates to address common original design failure points, including improved fin density and thicker core construction where needed. This part cross-references Spectra Premium CU1998 and Koyorad A1998 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from an aging or cracked radiator tank
• Overheating caused by reduced heat transfer efficiency
• Transmission fluid temperature concerns tied to a failing cooler circuit
• Corrosion or internal wear in the original radiator core
• Poor fit or sealing from a damaged replacement unit

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet size, and transmission cooler connection layout before installation. Inspect hoses, clamps, and mounting points for wear, and flush the cooling system if contamination is present. Confirm the cooling fan, thermostat, and pressure cap condition before returning the vehicle to service. This radiator does not include a cap.

Quality Assurance

OSC tests the transmission and engine oil coolers before tank installation, checks the core before assembly, and pressure tests the completed radiator again after assembly. The unit is engineered to factory specifications for fit and function and uses premium-grade components to support durability in the Toyota 4Runner cooling system.