Denso 221-9239 Radiator

Denso 221-9239 Radiator for Cadillac CTS

The Denso 221-9239 radiator is built for direct-fit cooling performance on select Cadillac CTS applications. With OE-style dimensions, integrated transmission oil cooler provision, and carefully matched inlet and outlet sizing, it supports stable engine temperature control and dependable heat exchange.

Compatible With 2008-2014 Cadillac CTS and 2010-2011 Cadillac CTS without heavy duty cooling, this radiator is a practical replacement for vehicles needing a precise fit and factory-style cooling layout.

Key Features

• Core height: 23.6200 in. for OE-style coverage
• Core width: 21.3000 in. for proper cooling surface area
• Core thickness: 0.6300 in. for balanced heat dissipation
• Transmission oil cooler included for automatic transmission applications
• Inlet diameter: 1.3750 in.; outlet diameter: 1.3600 in.
• Built to Denso OE configuration standards for fitment and function

Detailed Description

Denso Part Number 221-9239 is engineered as a radiator replacement for Cadillac CTS models that require OE-matched cooling performance. Denso supplies radiators to original equipment manufacturers worldwide, and this unit reflects that experience through its tank design, fin pitch, core dimensions, and material selection. The result is a radiator intended to maintain proper coolant flow and heat transfer under everyday driving and demanding operating conditions. If you are replacing a worn or leaking Cadillac CTS radiator, 221-9239 provides a direct-fit solution with the dimensions and cooler integration needed for a clean installation and reliable operation.

This part cross-references ACDelco 21706 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or corroded radiator
• Engine overheating caused by reduced heat exchange
• Transmission temperature concerns when the cooler circuit is compromised
• Restricted coolant flow from internal radiator deterioration
• Fitment issues from using a non-OE-style replacement radiator

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet sizing, and transmission cooler routing before installation. This radiator is listed for 2008-2014 Cadillac CTS and 2010-2011 Cadillac CTS without heavy duty cooling, so confirm your vehicle configuration matches the fitment notes. Inspect hoses, clamps, and coolant condition during replacement, and flush the cooling system if contamination or debris is present.

Quality Assurance

Denso radiators are manufactured to OE-level standards and undergo durability and function testing before release. Part Number 221-9239 is built to support dependable cooling performance and consistent fitment on the listed Cadillac CTS applications.