2002-2007 Subaru Impreza Pistons - All Torque Specs

2.5L H4

Applies to 2002, 2003, 2004, 2005, 2006, and 2007 Subaru Impreza

Labor Time:22 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
⚠️ Gasket Bolts	20	15	—
⚠️ Main Bearing Cap Bolts	75	55	TTY - tighten in sequence plus angle
Mounting Bolts	27	20	—
⚠️ Mounting Bolts	47	35	—
⚠️ Oil Drain Plug	35	26	Use new crush washer
⚠️ Oil Pan Bolts	12	9	—
⚠️ Oil Pump Pickup Tube	12	9	—
Sensor Bolts	11	8	—

The primary torque specification for pistons - all on a 2002-2007 Subaru Impreza is 45 Nm (33 lb-ft). Note: TTY - critical torque plus angle

There are 11 torque specifications for pistons - all on the 2002-2007 Subaru Impreza 2.5L H4, covering all related fasteners and components.