Use a torque wrench to tighten the head bolts in three even steps:

N/A Engines: 26, 52, 80 ft-lbs (36, 72, 110 Nm)

Turbo Engines: 30, 60, 90 ft-lbs (41, 82, 125 Nm)

Tighten all bolts to the specified torque before increasing to the next torque step.

Tighten bolts in the sequence shown.