Mazda MX-3 silhouetteMX-3

HEATER UNIT - Disassembly / Inspection / Assembly

G-38parts diagram

Heater core differs between B6 (1.6L I4) and K8 (1.8L V6) engines; K8 variant shown in inset.

Continued from G-37

Disassembly / Inspection / Assembly

  1. 1
    Disassemble in the order shown in the figure.
    Exploded view of the heater unit. Numbered balloon callouts: 1 = Airflow mode actuator, 2 = Mode door link, 3 = Air mix link, 4 = Mode door assembly, 5 = Mix door assembly, 6 = Heater core, 7 = Heater unit case. A K8 inset (top center) shows the K8-engine heater core variant; the main heater core is labeled B6.
  2. 2
    Check for the following and repair or replace the heater core as necessary: (1) Cracks, damage, and water leakage; (2) Bent fins; (3) Distorted and bent inlet.
  3. 3
    Assemble in the reverse order of disassembly.
Parts DiagramFig. fig1
#Part NameNotes
1Airflow mode actuatorInspection: page G-39
2Mode door link—
3Air mix link—
4Mode door assembly—
5Mix door assembly—
6Heater coreB6 and K8 engine variants shown
7Heater unit case—
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See also

page G-39

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