GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Pontiac
🢒
2006
🢒
Montana SV6 Ext.
🢒
Engine
🢒
Engine Mechanical - 3.5L
🢒 Cylinder Head Replacement - Left Side
Special Tools
J 45059
Angle Meter
Removal Procedure
Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
.
Drain the cooling system. Refer to
Cooling System Draining and Filling
.
Drain the engine oil. Refer to
Engine Oil and Oil Filter Replacement
.
Lower the vehicle.
Remove the lower intake manifold. Refer to
Lower Intake Manifold Replacement
.
Remove the valve rocker arms and the pushrods. Refer to
Valve Rocker Arm and Push Rod Replacement
.
Remove the exhaust crossover pipe. Refer to
Exhaust Crossover Pipe Replacement
.
Remove the oil level indicator tube. Refer to
Oil Level Indicator and Tube Replacement
.
Remove the left spark plug wires from the spark plugs. Refer to
Spark Plug Wire Replacement
.
Remove the left spark plugs. Refer to
Spark Plug Replacement
.
Remove the left exhaust manifold. Refer to
Exhaust Manifold Replacement - Left Side
.
Remove the left cylinder head bolts and discard.
Remove the left cylinder head.
Remove the left cylinder head gasket.
Clean and inspect the cylinder head and the gasket mating surfaces. Refer to
Engine Block Cleaning and Inspection
and
Cylinder Head Cleaning and Inspection
.
Installation Procedure
Install a new left cylinder head gasket.
Install the left cylinder head over the locator pins and the gasket.
Notice:
Refer to
Fastener Notice
in the Preface section.
Install the NEW small hex cylinder head bolts (5 and 8).
Install the NEW large hex cylinder head bolts (1, 2, 3, 4, 6 and 7).
Tighten
Tighten the cylinder head bolts a first pass in sequence to 60 N·m (44 lb ft).
Tighten the cylinder head bolts a final pass in sequence to 140 degrees using the
J 45059
.
Install the left exhaust manifold. Refer to
Exhaust Manifold Replacement - Left Side
.
Install the left spark plugs. Refer to
Spark Plug Replacement
.
Install the left spark plug wires to the spark plugs. Refer to
Spark Plug Wire Replacement
.
Install the oil level indicator tube. Refer to
Oil Level Indicator and Tube Replacement
.
Install the exhaust crossover pipe. Refer to
Exhaust Crossover Pipe Replacement
.
Install the valve rocker arms and pushrods. Refer to
Valve Rocker Arm and Push Rod Replacement
.
Install the lower intake manifold. Refer to
Lower Intake Manifold Replacement
.
Fill the crankcase with engine oil. Refer to
Engine Oil and Oil Filter Replacement
.
Fill the cooling system. Refer to
Cooling System Draining and Filling
.
Inspect for leaks.