Radiator for Buick Century (2000-2005) 3.1L

Direct-Fit Replacement Radiator for 2000-2005 Buick Century (W-Body)

What it Does: The replacement radiator restores peak thermal heat exchange on the 2000-2005 Century to maintain optimal operating temperatures and safeguard against catastrophic engine overheating.

The Stock Buick Century Radiator Failure Modes

Factory cooling systems on the W-Body platform rely on composite nylon end tanks clamped to an aluminum core via crimped gaskets. Over years of thermal cycling, vibration, and coolant degradation, these glass-filled plastic headers become embrittled. Common structural failure points include stress fractures along the tank seams, micro-cracks around the upper inlet neck, and internal transmission oil cooler integrity loss. When paired with the LG8 3100 V6 engine, any loss of pressure or chronic thermal expansion spikes will accelerate lower intake manifold and cylinder head gasket failures, introducing coolant sludge and localized boiling.

The Engineering Solution

Engineered to exact OEM geometric parameters, this crossflow heat exchanger drops directly into the stock cradle without line modification or bracket fabrication. The core features premium brazed aluminum construction paired with high-density louvered fin arrays designed to maximize ambient airflow dynamics and thermal rejection. High-strength polymer end tanks are reinforced and sealed with vulcanized gaskets to resist cyclic thermal fatigue. Integrated with an internal concentric automatic transmission fluid heat exchanger, this unit directly interchanges with GM numbers 52401484, 2343, and CU2343, and is 100% factory pressure tested to eliminate out-of-the-box pinhole leaks.

What's Included

• 1 Replacement Radiator with Integrated Automatic Transmission Oil Cooler

Technical Specifications

Compatibility

• 2000-2005 Buick Century Custom 3.1L V6 Automatic
• 2000-2005 Buick Century Limited 3.1L V6 Automatic
• 2005 Buick Century Special Edition 3.1L V6 Automatic

Frequently Asked Questions & Fitment Warnings

Does this fit the W-Body Century?

Yes, this is a direct fit for the 2000-2005 Buick Century equipped with the LG8 engine. Does not fit 1997-1999 Buick Century models.

Do I need to bleed the air from the cooling system after installation?

Yes, you must bleed trapped air using the brass bleed screws on the thermostat bypass and heater pipe until a continuous stream of coolant emerges, preventing hot spots and inaccurate temperature gauge readings.

The Buick Reliability Standard

Daily driven cruisers demand unwavering cooling system reliability, ensuring smooth transmission fluid regulation and durable thermal stability across thousands of highway miles.