Four Seasons 91546 HVAC Heater Core

Overview of Four Seasons Heater Core 91546

The Four Seasons Heater Core 91546 is designed to restore efficient heating performance in select Buick, Cadillac, Oldsmobile, and Pontiac vehicles. This aluminum heater core provides reliable heat transfer and meets or exceeds OEM specifications for a precise fit and function.

• Core dimensions: 7 inches length, 7.25 inches width, 2 inches thickness
• Constructed from durable aluminum for effective heat dissipation
• Core depth and height both measure 2.0 inches and 7.0 inches respectively
• Tube sizes: 0.625 inch (15.875 mm) and 0.75 inch (19.05 mm)
• Compatible with multiple GM models including Buick Century, Cadillac Eldorado, and Pontiac GTO
• Meets or exceeds original equipment manufacturer (OEM) standards

Four Seasons Heater Core Product Line Details

The Four Seasons Heater Core product line focuses on delivering replacement heater cores that maintain the original heating system’s performance and reliability. The Heater Core line uses quality materials such as aluminum to ensure efficient heat transfer and corrosion resistance. Part number 91546 is part of this line, engineered specifically for select GM vehicles to provide a direct fit and restore proper HVAC function.

Product Specifications and Features

This aluminum heater core features a compact design with a core width of 7.25 inches and a height of 7 inches, making it suitable for tight engine compartments. The core thickness of 2 inches and depth of 2 inches allow for effective coolant flow and heat exchange. The two inlet/outlet tubes measure 0.625 inch and 0.75 inch in diameter, ensuring compatibility with factory HVAC hose connections. The fixed pipe positioning means the heater core installs without the need for adjustment, simplifying replacement.

Compatible Vehicles and Applications

• Buick Century and LeMans models
• Cadillac Eldorado, Seville, and Toronado
• Oldsmobile Cutlass, Cutlass Supreme, and Custom Cruiser
• Pontiac Grand Am, Grand LeMans, Grand Prix, and GTO
• Designed to replace original heater cores in these vehicles to restore heating system efficiency

Installation Notes and Tips

• Ensure the cooling system is drained before removing the old heater core
• Verify hose sizes match the 0.625 inch and 0.75 inch tube diameters for proper fit
• Handle the aluminum core carefully to avoid damage during installation
• Check for leaks after installation and refill the cooling system as needed

Quality Assurance and Warranty

The Four Seasons Heater Core 91546 meets or exceeds OEM standards, ensuring reliable performance and durability. Manufactured with corrosion-resistant aluminum, this heater core is built to withstand typical operating conditions. While specific warranty details are not provided, Four Seasons products generally come with a limited warranty against defects in materials and workmanship.