Koyorad A1998 Radiator

Koyorad A1998 Radiator for Toyota 4Runner

The Koyorad A1998 radiator is an OE-equivalent replacement built for 1996-2002 Toyota 4Runner applications. It combines an aluminum core with plastic tanks and includes an internal transmission oil cooler for direct-fit cooling system service.

Key Features

• Fits 1996-2002 Toyota 4Runner, N/A
• OE-style replacement radiator from Koyorad
• Aluminum core with a single-row design
• Plastic tank construction
• Internal transmission oil cooler included
• Inlet and outlet diameters: 1.3125 in.
• Transmission oil cooler diameter: 1.125 in.
• Core dimensions: 22.625 in. height, 26.0625 in. width, 1 in. thickness

Detailed Description

Built for direct replacement service, the Koyorad A1998 radiator is engineered to match OE-style fitment and cooling performance for the Toyota 4Runner. The aluminum core supports efficient heat transfer, while the plastic tank design follows the construction commonly used in factory-style radiator assemblies. This radiator also includes an internal transmission oil cooler, making it a practical choice for vehicles that route automatic transmission fluid through the radiator for temperature control. If you are searching for a radiator for 1996-2002 Toyota 4Runner models, Koyorad A1998 provides the core dimensions and connection sizes needed for a proper replacement.

Koyorad focuses on replacement radiators built from technical manufacturing experience, with the goal of delivering a correct-fit part for the application. The A1998 is a straightforward option for Toyota 4Runner cooling system repair when the original radiator is leaking, clogged, or no longer maintaining stable operating temperatures.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator
• Overheating caused by restricted coolant flow
• Transmission fluid temperature control issues tied to a failing cooler circuit
• Corrosion or deterioration in the original radiator core
• Reduced cooling efficiency in high-mileage Toyota 4Runner models

Installation Notes and Tips

Verify inlet and outlet hose sizes, transmission cooler line connections, and overall core dimensions before installation. Flush the cooling system, inspect hoses and clamps, and confirm that the radiator mounts and fan shroud alignment match the vehicle before final assembly. For 1996-2002 Toyota 4Runner radiator replacement, transfer and reconnect all related cooling system components according to factory service procedures.

Quality Assurance

Koyorad manufactures OE-equivalent replacement radiators using application-specific engineering and production experience. This part cross-references Denso (e.g., 221-0508) for the same application.