CSF 3864 Radiator

OE-Style Radiator for Buick Envision

CSF Radiator 3864 is an OE-style replacement radiator built with an aluminum core and plastic tanks for the 2016-2019 Buick Envision and 2020 Buick Envision. It is engineered as a cross-flow design with a single-row core to match the original cooling layout and support consistent engine temperature control.

CSF has produced radiators for decades and validates cooling performance through lab testing and wind tunnel evaluation. Part number 3864 is built to the same general form and fit as the original unit, making it a direct choice for Buick Envision radiator replacement work.

Key Features

• OE-style plastic tank and aluminum core construction
• Cross-flow radiator design
• Single-row core for factory-style cooling layout
• Core dimensions: 26 3/4 in. length, 17 in. width, 7/8 in. thickness
• Inlet and outlet sizes: 1 3/16 in. left inlet, 1 3/16 in. right outlet
• No radiator cap included
• Direct-fit replacement for Buick Envision cooling system service

Detailed Description

CSF 3864 is a replacement radiator designed for the 2016-2019 Buick Envision and 2020 Buick Envision. The aluminum core helps transfer heat efficiently, while the plastic tanks follow the original equipment style used on the vehicle. With a cross-flow layout and factory-matched inlet and outlet placement, this radiator is built for straightforward service on the Buick Envision cooling system.

This part cross-references Spectra Premium CU13633 and Carlson 13633 for the same application. If you are replacing a leaking, clogged, or damaged radiator, CSF 3864 provides an OE-style solution for Buick Envision radiator replacement and cooling system repair.

Common Issues This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Restricted coolant flow from internal corrosion or buildup
• Engine overheating caused by reduced heat dissipation
• Physical damage to the radiator core from road debris or impact
• Cooling performance loss from a worn original radiator

Installation Notes and Tips

Verify inlet and outlet orientation before installation: this unit uses a left-side inlet and right-side outlet. Confirm radiator dimensions and mounting layout against the original part before removal, and inspect hoses, clamps, and coolant condition during service. Proper system bleeding and refill procedures should be followed after installation to help prevent trapped air in the cooling system.

Quality Assurance

CSF manufactures radiators to high-performance standards and uses engineering validation methods such as lab and wind tunnel testing to confirm cooling performance. Part number 3864 is built as an OE-style replacement for the Buick Envision platform.