2015-2021 Subaru WRX Piston - Single Torque Specs

2.0L Turbo H4

Applies to 2015, 2016, 2017, 2018, 2019, 2020, and 2021 Subaru WRX

Labor Time:18 hours

Torque Values (11 specifications)

Component	Nm	lb-ft	Notes
⚠️ Connecting Rod Bolts	45	33	TTY - critical torque plus angle
Cover Bolts	16	12	—
⚠️ Cylinder Head Bolts	65	48	TTY - tighten in sequence plus angle
Electrical Connector Bolts	7	5	—
⚠️ Gasket Bolts	20	15	—
⚠️ Gasket Surface Bolts	20	15	Clean mating surfaces
⚠️ Mounting Bolts	47	35	—
⚠️ Oil Drain Plug	35	26	Use new crush washer
⚠️ Oil Pan Bolts	12	9	—
Sensor Bolts	11	8	—
Sensor Mounting Bolts	11	8	—

The primary torque specification for piston - single on a 2015-2021 Subaru WRX is 45 Nm (33 lb-ft). Note: TTY - critical torque plus angle

There are 11 torque specifications for piston - single on the 2015-2021 Subaru WRX 2.0L Turbo H4, covering all related fasteners and components.