Cylinder Head Assembly: Specifications

2010 Chevrolet HHR L4-2.2LSECTION Specifications
CYLINDER HEAD TORQUE AND SEQUENCE






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

HEAD BOLD REUSE/REPLACE

Note: Always use new cylinder head bolts.

SURFACE VARIATION - HEAD-TO-BLOCK

Cylinder Head
Surface Flatness - Block Deck
Transverse 0.030 mm (0.0012 in)
Longitude 0.050 mm (0.002 in)
Overall 0.1 mm (0.004 in)

Cylinder Block
Cylinder Head Deck Surface Flatness
Transverse 0.030 mm (0.0012 in)
Longitude 0.050 mm (0.002 in)
Overall 0.08 mm (0.0031 in)

INTAKE MANIFOLD TORQUE AND SEQUENCE






Intake Manifold to Cylinder Head Bolt and Nut 10 Nm (89 lb in)
Intake Manifold to Cylinder Head Stud 6 Nm (53 lb in)

CAMSHAFT BEARING CAP TORQUE AND SEQUENCE

Install the camshaft caps and hand start the camshaft cap bolts.
Tighten the camshaft cap bolts in increments of 3 turns until they are seated.
Tighten the camshaft caps to 10 Nm (89 lb in)

CRANKSHAFT PULLEY TORQUE

Crankshaft Balancer Bolt

First Pass 100 Nm (74 lb ft)
Final Pass 125 degrees

EXHAUST MANIFOLD TORQUE AND SEQUENCE






Exhaust Manifold to Cylinder Head Nut 14 Nm (10 lb ft)
Install NEW exhaust manifold nuts.
RENDER: 1.0x

NO RELATED

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Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.