Removal Procedure
- Evacuate air conditioning system. Refer
to
Refrigerant Recovery and Recharging
in Heating, Ventilation and Air Conditioning.
- Drain cooling system. Refer to
Cooling System Draining and Filling
in
Engine Cooling.
- Remove air cleaner housing assembly.
- Remove upper radiator support.
- Disconnect electrical from cooling fans.
- Remove transmission cooler lines from radiator. Refer to
Transmission Fluid Cooler Hose/Pipe Replacement
in
Automatic Transmission - 4L60-E/4L65-E.
- Remove A/C line from condenser.
- Remove A/C line by surge tank.
- Remove lower radiator hose from thermostat housing.
- Remove upper radiator hose from water pump outlet.
- Remove surge tank hose from radiator.
- Remove condenser/radiator/fan module as an assembly.
- Remove the timing chain and camshaft sprocket. Refer to
Timing Chain and Sprocket Replacement
.
- Remove the valve lifters from both cylinder heads. Refer to
Valve Lifter Replacement
.
- Remove the camshaft retainer bolts and retainer.
Notice: All camshaft journals are the same diameter, so care must be used in
removing or installing the camshaft to avoid damage to the camshaft bearings.
- Remove the camshaft.
16.1. | Install three M8-1.25 x 100 mm (M8-1.25 x 4.0 in) bolts
to the bolt holes in the front of the camshaft. |
16.2. | Using the bolts as a handle, carefully rotate and pull the camshaft out
of the engine block. |
16.3. | Remove the three bolts from the camshaft. |
- Clean and inspect the camshaft and bearings. Refer to
Camshaft and Bearings Cleaning and Inspection
.
Installation Procedure
Important: If camshaft replacement is required, the
valve lifters must also be replaced.
- Lubricate the camshaft journals and the
bearings with clean engine oil.
- Install three M8-1.25 x 100 mm (M8-1.25 x 4.0 in) bolts
to the bolt holes in the front of the camshaft.
Notice: All camshaft journals are the same diameter, so care must be used in
removing or installing the camshaft to avoid damage to the camshaft bearings.
- Using the bolts as a handle, carefully install the camshaft into the engine
block.
- Remove the three bolts from the front of the camshaft.
Important: Install the retainer plate with the sealing
gasket facing the engine block.
The gasket surface on the engine block
should be clean and free of dirt and/or debris.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the camshaft retainer and bolts.
Tighten
Tighten the camshaft retainer bolts to 25 N·m
(18 lb ft).
- Install the timing chain and camshaft sprocket. Refer to
Timing Chain and Sprocket Replacement
.
- Install the valve lifters. Refer to
Engine Oil Pressure Sensor and/or Switch Replacement
.
- Install condenser/radiator/fan module as an assembly.
- Install surge tank hose to radiator.
- Install upper radiator hose to water pump outlet.
- Install lower radiator hose to thermostat housing.
- Install A/C line by surge tank.
- Install A/C line to condenser.
- Install transmission cooler lines to radiator. Refer to
Transmission Fluid Cooler Hose/Pipe Replacement
in
Automatic Transmission - 4L60-E/4L65-E.
- Connect electrical to cooling fans.
- Install upper radiator support.
- Install air cleaner housing assembly.
- Recharge air conditioning system. Refer to
Refrigerant Recovery and Recharging
in
Heating, Ventilation and Air Conditioning.
- Fill cooling system. Refer to
Cooling System Draining and Filling
in
Engine Cooling.