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 MANUALSCHEVROLET2011HHR L4-2.4LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER HEAD ASSEMBLYSPECIFICATIONS
2011 Chevrolet HHR L4-2.4L
Cylinder Head Assembly: Specifications
2011 Chevrolet HHR L4-2.4LSECTION Specifications
Cylinder Head Bolt
First Pass 30 Nm (22 lb ft)
Final Pass 155 degrees
HEAD BOLT REUSE/REPLACE
Note: Always use new cylinder head bolts.
Cylinder Head
Surface Flatness - Block Deck
Longitude 0.050 mm (0.002 in)
Overall 0.1 mm (0.004 in)
Transverse 0.030 mm (0.0012 in)
Block
Cylinder Head Deck Surface Flatness
Longitude 0.050 mm (0.002 in)
Overall 0.08 mm (0.0031 in)
Transverse 0.030 mm (0.0012 in)
Camshaft Cap Bolt 10 Nm (89 lb in)
Intake Manifold Specifications
Exhaust Manifold Service and Repair
Camshaft Gear/Sprocket Specifications
First Pass 30 Nm (22 lb ft)
Final Pass 155 degrees
HEAD BOLT REUSE/REPLACE
Note: Always use new cylinder head bolts.
Cylinder Head
Surface Flatness - Block Deck
Longitude 0.050 mm (0.002 in)
Overall 0.1 mm (0.004 in)
Transverse 0.030 mm (0.0012 in)
Block
Cylinder Head Deck Surface Flatness
Longitude 0.050 mm (0.002 in)
Overall 0.08 mm (0.0031 in)
Transverse 0.030 mm (0.0012 in)
Camshaft Cap Bolt 10 Nm (89 lb in)
Intake Manifold Specifications
Exhaust Manifold Service and Repair
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.