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Four Seasons 91471 HVAC Heater Core
Four Seasons 91471 Heater Core Overview
The Four Seasons 91471 heater core is a copper/brass HVAC replacement built for heat transfer and OE-style fitment. It is compatible with 1988-1993 Pontiac LeMans models without air conditioning and is a direct-fit heater core for restoring cabin heat performance.
Four Seasons Heater Core line components are built for HVAC service work where accurate dimensions and dependable thermal performance matter. This heater core measures 7.000 inches high, 7.500 inches wide, and 2.000 inches deep, with 0.625-inch inlet/outlet tubes and a copper core material construction.
Key Features
- Part number: 91471
- Fits 1988-1993 Pontiac LeMans, N/A
- Compatible with models that do not have air conditioning
- Copper/brass heater core construction
- Core material: copper
- Core dimensions: 7.000 in. H x 7.500 in. W x 2.000 in. D
- 0.625 in. tube size on both connections
- Meets or exceeds OEM requirements
Detailed Description
The Four Seasons 91471 heater core is a replacement HVAC heater core for Pontiac LeMans applications from 1988 through 1993 that do not have air conditioning. Its copper/brass design supports efficient heat exchange, while the listed dimensions help confirm proper fit during heater box service. If you are replacing a leaking or restricted heater core in a Pontiac LeMans, this part number 91471 provides an OE-style solution for the factory heating system.
This part cross-references AP Exhaust 2514 for the same application.
What It Can Help Resolve
- Weak or inconsistent cabin heat
- Coolant odor inside the vehicle
- Interior windshield fogging caused by heater core leakage
- Coolant loss from a leaking HVAC core
- Restricted coolant flow through the heater circuit
Installation Notes and Tips
- Verify the vehicle is a 1988-1993 Pontiac LeMans without air conditioning before ordering.
- Compare the existing core dimensions and tube size to the listed specifications.
- Inspect heater hoses, clamps, and coolant condition during replacement.
- Flush the cooling system if contamination or debris is present.
- Bleed air from the cooling system after installation to restore proper heater performance.
Quality Assurance
This Four Seasons heater core meets or exceeds OEM requirements and is built to the listed dimensional and material specifications for service replacement use.
| Brand | Four Seasons |
| Part Number | 91471 |
| Position | Heater Core |
| Length | 7 |
| Thickness | 2 |
| Width | 7-1/2 |
| Core Material | Copper |
| Adjustable Pipe Positioning | No |
| Core Depth IN | 2.000 |
| Core Height IN | 7.000 |
| Core Width IN | 7.500 |
| Description | Heater cores |
| Meets / Exceeds OEM? | Yes |
| Style | Copper/brass heater core |
| Tube 1 IN | 0.625 |
| Tube 1 MM | 15.875 |
| Tube 2 IN | 0.625 |
| Tube 2 MM | 15.875 |
| Type | Heater core /copper brass |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1993 | Pontiac | LeMans | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1992 | Pontiac | LeMans | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1991 | Pontiac | LeMans | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1990 | Pontiac | LeMans | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1989 | Pontiac | LeMans | N/A | Compatible with models that do not have air conditioning.; Heater Core |
| 1988 | Pontiac | LeMans | N/A | Compatible with models that do not have air conditioning.; Heater Core |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.