Four Seasons 90504 HVAC Heater Core

Four Seasons 90504 Heater Core for Dodge Dart

The Four Seasons 90504 heater core is an aluminum HVAC heater core built for 1970-1976 Dodge Dart models without air conditioning. It is engineered and tested for dependable heat transfer and consistent cabin heating performance.

Four Seasons Heater Core line parts focus on direct-fit HVAC service components for repair work that needs accurate dimensions and reliable operation. This 90504 heater core follows that approach with aluminum construction and application-specific sizing for Dodge Dart heater service.

Key Features

• Aluminum heater core construction
• Core dimensions: 7.625 in. height, 6 in. width, 1.25 in. depth
• Tube sizes: 0.5 in. and 0.750 in.
• Direct replacement for HVAC heater core service
• Fits 1970-1976 Dodge Dart, w/o AC; Heater Core
• Four Seasons part number 90504

Detailed Description

This Four Seasons 90504 heater core is a heater core / aluminum assembly for Dodge Dart heating system repair. The aluminum design supports efficient heat exchange inside the HVAC case, while the listed dimensions help match the original fitment for 1970-1976 Dodge Dart vehicles without air conditioning. If you are replacing a leaking or restricted heater core in a Dodge Dart, this part number 90504 provides a direct service option for the application.

This part cross-references Dorman - HELP 93504 and 94504 for the same application.

What It Helps Fix

• Loss of cabin heat in a Dodge Dart
• Coolant odor inside the vehicle
• Coolant seepage from the HVAC heater core area
• Restricted coolant flow through the heater circuit
• Uneven or weak defrost performance caused by heater core issues

Installation Notes and Tips

Verify the vehicle is a 1970-1976 Dodge Dart without air conditioning before ordering. Compare the core height, width, depth, and tube sizes to the original unit before installation. Inspect heater hoses, clamps, and the HVAC case for wear or contamination during service so the replacement can be completed cleanly.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation, backed by more than 50 years of mobile A/C experience. Part number 90504 is built to support dependable HVAC repair on the listed Dodge Dart applications.