Radiator for Acura TSX (2004-2005) 2.4L Automatic

Direct-Fit Replacement Radiator for 2004-2005 Acura TSX (CL9)

What it Does: The replacement radiator restores reliable engine cooling and automatic transmission fluid thermal regulation on the 2004-2005 Acura TSX to eliminate overheating risks and prevent catastrophic powertrain damage.

The Stock Acura TSX Radiator Degradation & Failure Points

The aging factory cooling unit on the first-generation CL9 chassis suffers severe heat fatigue after continuous thermal cycling. Over years of exposure to pressurized 200-plus-degree coolant, the stock glass-filled nylon end tanks become brittle, developing microscopic hairline fractures around the crimp seals and upper hose neck. Simultaneously, internal tube passages accumulate scale while the internal oil cooler circuit risks rupture, threatening cross-contamination between motor coolant and transmission fluid. External fin deterioration from road debris and corrosion further chokes core airflow dynamics, leading to severe thermal climb during idle or stop-and-go traffic.

The Engineering Solution

Engineered to exact OEM dimensional tolerances, this drop-in replacement restores maximum convective efficiency to the K24A2 cooling system. The core utilizes brazed aluminum construction featuring 5/8-inch tubing paired with high-density, multi-louvered micro-fins to accelerate heat dissipation under heavy engine loads. Reinforced, heat-stabilized composite polymer tanks are mechanically crimped with vulcanized rubber gaskets to ensure an airtight, burst-resistant seal. Designed exclusively for automatic drivetrains, it integrates an internal concentric transmission fluid heat exchanger, aligning directly with factory line unions and core support mounts without bracket alteration.

What's Included

• 1 Replacement Radiator Assembly with Integrated Automatic Transmission Oil Cooler

Technical Specifications

Compatibility

• 2004 Acura TSX Base Sedan 2.4L L4 (Automatic Transmission Only)
• 2005 Acura TSX Base Sedan 2.4L L4 (Automatic Transmission Only)

Frequently Asked Questions & Fitment Warnings

Does this fit the CL9 TSX?

Yes, this is a direct fit for the 2004-2005 Acura TSX equipped with the K24A2 engine. Does not fit 6-speed manual transmission models; this radiator is built strictly for automatic transmission vehicles requiring internal oil cooler circuits.

Do I need to bleed the system after installation?

Yes, you must completely refill the system with factory-spec Type-2 coolant and bleed all trapped air pockets to prevent hot spots and inaccurate temperature readings.

The Acura Caliber

Built for the high-revving demands of the JDM-derived K-series platform, this radiator ensures stable heat rejection and uninterrupted power delivery throughout daily commute conditions or spirited VTEC operation.