engine

Exhaust Manifold Torque Specs

for 2002 GMC Sierra 1500 4.3L V6 Vortec · RWD

Units

11 fasteners

Seq

Component

Torque

Angle

—

Cover Bolts

14 lb-ft · 19 Nm

—

Electrical Connector Bolts

6 lb-ft · 8 Nm

—

Exhaust Flange Bolts

Apply anti-seize | ⚠️ VERIFY SEQUENCE WITH SERVICE MANUAL

33 lb-ft · 45 Nm

—

Exhaust Manifold Nuts

Apply anti-seize, work hot-to-cold | ⚠️ VERIFY SEQUENCE WITH SERVICE MANUAL

22 lb-ft · 30 Nm

—

Flange Bolts

Anti-seize

35 lb-ft · 47 Nm

—

Gasket Surface Bolts

Clean mating surfaces

17 lb-ft · 23 Nm

—

Hanger Bolts

15 lb-ft · 20 Nm

—

Heat Shield Bolts

⚠️ VERIFY SEQUENCE WITH SERVICE MANUAL

7 lb-ft · 10 Nm

—

Mounting Bolts

40 lb-ft · 54 Nm

—

O2 Sensor

Anti-seize threads

35 lb-ft · 47 Nm

—

Sensor Mounting Bolts

9 lb-ft · 12 Nm

—

2002 GMC SIERRA 1500

11 fasteners