engine

Head Gaskets - Both Torque Specs

for 2006 GMC Sierra 1500 4.8L V8 Vortec · 4WD

Units

7 fasteners

Seq

Component

Torque

Angle

—

Camshaft Cap Bolts

Critical

Torque sequence

12 lb-ft · 16 Nm

—

Cylinder Head Bolts

Critical

Multi-step + angle

65 lb-ft · 88 Nm

—

Cylinder Head Bolts (M11)

Critical

TTY Bolts. Step 1: 22 lb-ft. Step 2: 90 deg. Step 3: 90 deg. Spiral sequence.

22 lb-ft · 30 Nm

180°

—

Cylinder Head Bolts (M8)

Critical

Upper row small bolts. Tighten to 22 lb-ft in sequence (inner to outer).

22 lb-ft · 30 Nm

—

Exhaust Manifold Nuts

Critical

25 lb-ft · 34 Nm

—

Intake Manifold Bolts

Critical

18 lb-ft · 24 Nm

—

Valve Cover Bolts

Critical

10 lb-ft · 14 Nm

—