Four Seasons 91586 HVAC Heater Core
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Four Seasons
 Heater Core

Four Seasons 91586 HVAC Heater Core

Brand Four Seasons 91586
Length 7-3/4
Thickness 1-7/8
Width 6
Core Material Copper
Adjustable Pipe Positioning No
Core Depth IN 1.875
Core Height IN 7.750
Core Width IN 6.000
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 0.750
Tube 2 MM 19.050
Type Heater core /copper brass
Product line Heater Core
Fits Ford and Mercury · 12 vehicles

OE direct replacement. Meets OEM requirements for a straightforward replacement.

Copper/brass construction. Built with a copper core for efficient heat transfer.

Heater core. Restores cabin heat through the HVAC system.

Cross-references Anchor 2222, Anchor 9037 and APDI 9010051 for the same application. See all 22.

$86.00Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $86.00
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all HVAC Heater Core options

Heater Core for Ford Pinto and Mercury Bobcat

Restore cabin heat with this Four Seasons Heater Core, part number 91586. Built with a copper/brass heater core style and copper core material, it is made to meet or exceed OEM requirements for a direct-fit HVAC repair on select Ford Pinto and Mercury Bobcat applications.

Compatible with 1971-1978 Ford Pinto models without air conditioning and 1975-1978 Mercury Bobcat models without air conditioning, this heater core is sized for the original HVAC case dimensions and tube layout. Four Seasons 91586 is a practical replacement when the factory core is leaking, restricted, or no longer transferring heat efficiently.

Key Features

  • Four Seasons Heater Core, part number 91586
  • Copper/brass heater core construction
  • Copper core material for heat transfer performance
  • Meets or exceeds OEM specifications
  • Core dimensions: 7-3/4 in. length, 6 in. width, 1-7/8 in. thickness
  • Tube sizes: 0.625 in. and 0.750 in.
  • Direct replacement for select Ford Pinto and Mercury Bobcat HVAC systems

Product Details

This heater core is part of Four Seasons’ Heater Core line, a product line focused on HVAC replacement components for vehicle climate control systems. The 91586 heater core uses a copper/brass design with a copper core, helping maintain efficient heat exchange inside the heater box. Its listed dimensions and tube sizes support accurate fitment in the original HVAC housing for the specified Ford and Mercury applications.

This part cross-references APDI 9010051 for the same application. Four Seasons 91586 is also referenced by multiple interchange numbers, including 94586 and 399037, for related fitment coverage.

What It Helps Fix

  • Weak or inconsistent cabin heat
  • Coolant seepage from a leaking heater core
  • Restricted coolant flow through the HVAC core
  • Fogging or sweet coolant odor inside the cabin
  • Heat loss caused by an aging or corroded core

Installation Notes and Tips

Install this heater core in the vehicle’s HVAC case following the factory service procedure. Confirm that the replacement core matches the original dimensions, tube diameters, and hose routing before assembly. Because this application is listed for vehicles without air conditioning, verify the HVAC configuration before ordering. Flush the cooling system and inspect hoses, clamps, and coolant condition during replacement to help protect the new core.

Quality Assurance

Four Seasons 91586 is listed as meeting or exceeding OEM requirements for the specified applications. It is engineered as an HVAC heater core replacement for 1971-1978 Ford Pinto and 1975-1978 Mercury Bobcat models without air conditioning.

  • Fits 1971-1978 Ford Pinto, N/A, compatible with models that do not have air conditioning; Heater Core
  • Fits 1975-1978 Mercury Bobcat, N/A, compatible with models that do not have air conditioning; Heater Core

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1978FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1978MercuryBobcatN/ACompatible with models that do not have air conditioning.; Heater Core
1977FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1977MercuryBobcatN/ACompatible with models that do not have air conditioning.; Heater Core
1976FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1976MercuryBobcatN/ACompatible with models that do not have air conditioning.; Heater Core
1975FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1975MercuryBobcatN/ACompatible with models that do not have air conditioning.; Heater Core
1974FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1973FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1972FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
1971FordPintoN/ACompatible with models that do not have air conditioning.; Heater Core
Directly replaces or cross-references 22 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 2222Anchor — 9037APDI — 9010051Four Seasons — 91586Four Seasons — 98586Global Parts Distributors LLC — 1812068903709458625010727931439903755458660931870222215626066603008D1FZ18476AD1FZ18476BFM9037H2202HT399037ZH107