Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2012COLORADO 2WD L4-2.9LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER HEAD ASSEMBLYSPECIFICATIONS
2012 Chevrolet Colorado 2WD L4-2.9L
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.