Four Seasons 90074 HVAC Heater Core

Overview of Four Seasons Heater Core 90074 for Acura RL

The Four Seasons Heater Core 90074 is designed specifically for the Acura RL, providing reliable heating performance and efficient cabin temperature control. This aluminum heater core meets or exceeds OEM standards, ensuring compatibility and durability for your vehicle's HVAC system.

• Core dimensions: 6-3/8 inches length, 7-1/2 inches width, 1-1/4 inches thickness
• Constructed from lightweight, corrosion-resistant aluminum
• Core depth of 1.250 inches and core height of 6.375 inches
• Tube diameter: 0.750 inches (19.05 mm) for both inlet and outlet tubes
• Non-adjustable pipe positioning for direct OEM replacement
• Part number 90074, compatible with Acura RL models

Detailed Description of the Four Seasons Heater Core

The Four Seasons Heater Core 90074 is engineered with an aluminum core that offers efficient heat transfer and resistance to corrosion, which is essential for maintaining consistent heating performance in the Acura RL. The precise core dimensions—6-3/8 inches in length, 7-1/2 inches in width, and 1-1/4 inches in thickness—ensure a proper fit within the vehicle’s HVAC housing. Both inlet and outlet tubes measure 0.750 inches in diameter, matching OEM specifications for seamless integration. This heater core does not feature adjustable pipe positioning, reflecting its design as a direct replacement part that meets or exceeds original equipment manufacturer requirements.

About the Four Seasons Heater Core Product Line

The Four Seasons Heater Core product line focuses on delivering reliable HVAC components that maintain vehicle comfort and system efficiency. This line includes aluminum heater cores designed to provide consistent heat output and durability. The 90074 model is part of this line, offering a direct fit for the Acura RL and engineered to meet OEM standards for performance and longevity.

Common Issues Resolved by Replacing the Heater Core

• Insufficient cabin heat during cold weather
• Coolant leaks inside the vehicle or under the dashboard
• Fogging or moisture buildup on interior windows
• Unpleasant odors caused by leaking coolant
• Overheating of the HVAC system due to clogged or damaged core

Installation Notes and Tips

• Ensure the vehicle is cool and coolant system is depressurized before removal
• Drain the cooling system to prevent spills during heater core replacement
• Verify the heater core dimensions and tube sizes match the original part
• Inspect and replace any worn hoses or clamps during installation
• Refill and bleed the cooling system properly to avoid air pockets

Quality Assurance and Warranty

The Four Seasons Heater Core 90074 is manufactured to meet or exceed OEM specifications, ensuring reliable performance and fitment for the Acura RL. Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Refer to the product documentation for specific warranty details.