Cylinder Head Assembly: Specifications

2012 Chevrolet Colorado 2WD L4-2.9LSECTION Specifications




Cylinder Head Bolt - 10
First Pass 30 Nm (22 lb ft)
Final Pass 155 degrees

Cylinder Head End Bolts - 2 Short
First Pass 7 Nm (62 lb in)
Final Pass 60 degrees

Cylinder Head End Bolts - 1 Long
First Pass 7 Nm (62 lb in)
Final Pass 120 degrees

Bolt Re-usability

Caution: This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.

Cylinder Head
Surface Flatness - Block Deck 0.08 mm (0.003 in)
Surface Flatness - Exhaust Manifold Deck 0.08 mm (0.003 in)
Surface Flatness - Intake Manifold Deck 0.08 mm (0.003 in)

Block
Cylinder Head Deck Surface Flatness 0.08 mm (0.003 in)

CAMSHAFT BEARING CAP

Camshaft Cap Bolt 12 Nm (106 lb in)

Intake Manifold Specifications

Exhaust Manifold Specifications

Camshaft Gear Sprocket Specifications
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.