2017-2024 Mazda Mazda3 Heater Core Torque Specs

2.5L I4

Applies to 2017, 2018, 2019, 2020, 2021, 2022, 2023, and 2024 Mazda Mazda3

Labor Time:6 hours

🔧 Torque Values8 specifications

Component	lb-ft	Nm	Notes
Cover Screws	8	11	—
Dashboard Screws	2	3	—
Heater Core Mounting	6	8	—
Heater Hose Clamps	2	3	—
Hose Clamps	3	4	—
⚠️ Housing Bolts	10	14	—
Mounting Bolts	20	27	—
⚠️ Pump Bolts	18	24	—

⚠️ = Critical torque value | Always verify with vehicle-specific service manual

⚠️ Some critical specs are estimated. Please verify sequence.

1990-1997 4.6L V8 Modular

2007-2012 3.7L I5

2011-2016 6.7L V8 Power Stroke Diesel

2022-2024 GT-Line Dual Motor AWD

1992-1995 1.5L I4 D15

2016-2023 2.0L Turbo I4

The primary torque specification for heater core on a 2017-2024 Mazda Mazda3 is 11 Nm (8 lb-ft).

There are 8 torque specifications for heater core on the 2017-2024 Mazda Mazda3 2.5L I4, covering all related fasteners and components.