Cadillac STS 2006 Repair Instructions Download Page 47

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10/25/2014

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14. Remove and discard the cylinder head gasket.

15. Clean and inspect the cylinder head and the engine block sealing surfaces. Refer to Cylinder

Head Cleaning and Inspection and Engine Block Cleaning and Inspection .

16. If necessary, perform the following steps:

1. Remove the exhaust manifold from the cylinder head. Refer to Exhaust Manifold

Removal - Left Side .

2. Disassemble the cylinder head. Refer to Cylinder Head Disassemble .

ON-VEHICLE REPAIR INSTRUCTIONS > CYLINDER HEAD REPLACEMENT - LEFT SIDE >
INSTALLATION PROCEDURE

1. If necessary, perform the following steps:

1. Assemble the cylinder head. Refer to Cylinder Head Assemble .

2. Install the exhaust manifold to the cylinder head. Refer to Exhaust Manifold Installation

- Left Side .

Fig 4: View Of Left Cylinder Head Gasket

Courtesy of GENERAL MOTORS CORP.

Summary of Contents for STS 2006

Page 1: ...ve the upper intake manifold with the lower intake manifold Refer to Lower Intake Manifold Replacement 2 Remove the left bank camshaft cover Refer to Camshaft Cover Replacement Left Side 3 Remove the camshaft sensors Refer to Camshaft Position Sensor Replacement Bank 2 Left Side Exhaust and Camshaft Position Sensor Replacement Bank 2 Left Side Intake 4 Remove the camshaft position actuator solenoi...

Page 2: ... IMPORTANT Rotate the crankshaft balancer in a clockwise rotation ONLY 5 Rotate the crankshaft using the crankshaft balancer bolt until the camshafts are in a neutral low tension position The camshaft flats will be parallel with the camshaft cover rail 1 Fig 1 Camshaft Flats Parallel With Camshaft Cover Rail Courtesy of GENERAL MOTORS CORP ...

Page 3: ...r to Torque Reaction Against Timing Drive Chain Notice IMPORTANT 1 Use an open end wrench at the camshaft hex to prevent camshaft engine rotation 2 DO NOT remove the camshaft position actuator bolt at this time 6 Loosen the camshaft position actuator bolt Fig 2 Preventing Camshaft Engine Rotation Using Open End Wrench Courtesy of GENERAL MOTORS CORP ...

Page 4: ...e className 4 51 IMPORTANT Ensure that the tips of the EN 46108 are fully engaged into the timing chain 3 and 4 See Special Tools 7 Install the EN 46108 1 and 2 in order to retain the timing chain See Special Tools Firmly tighten the EN 46108 nuts See Special Tools Fig 3 Identifying EN 46108 Courtesy of GENERAL MOTORS CORP ...

Page 5: ...ctuators are marked for proper assembly 8 Mark the timing chain and the respective locations on the camshaft position actuators 1 4 9 Remove the camshaft position actuator bolt 10 Remove the camshafts Refer to Camshaft Removal Left Side ON VEHICLE REPAIR INSTRUCTIONS CAMSHAFT REPLACEMENT LEFT SIDE INSTALLATION PROCEDURE Fig 4 Locating Left Secondary Camshaft Drive Chain Timing Marks Courtesy of GE...

Page 6: ...ming chain 1 4 are aligned 2 DO NOT tighten the camshaft position actuator bolt at this time 1 Locate the camshafts to the cylinder head and assemble the camshaft actuators to the camshafts 2 Install the camshafts and the camshaft bearing caps Refer to Camshaft Installation Left Side 3 Remove the EN 46108 See Special Tools Fig 1 Locating Left Secondary Camshaft Drive Chain Timing Marks Courtesy of...

Page 7: ...shaft position actuators Refer to Camshaft Position Actuator Installation Left Side Intake Second Design and Camshaft Position Actuator Installation Left Side Exhaust Second Design 5 Install the intake camshaft position actuator solenoid Refer to Camshaft Position Actuator Solenoid Valve Solenoid Replacement Bank 2 Left Side Intake 6 Install the camshaft sensors Refer to Camshaft Position Sensor R...

Page 8: ...IDE TOOLS REQUIRED EN 46108 Timing Chain Retention Tool See Special Tools ON VEHICLE REPAIR INSTRUCTIONS CAMSHAFT REPLACEMENT RIGHT SIDE REMOVAL PROCEDURE 1 Remove the upper intake manifold with the lower intake manifold Refer to Lower Intake Manifold Replacement 2 Remove the camshaft cover Refer to Camshaft Cover Replacement Right Side 3 Remove the camshaft sensors Refer to Camshaft Position Sens...

Page 9: ...IMPORTANT Rotate the crankshaft balancer in a clockwise rotation ONLY 5 Rotate the crankshaft using the crankshaft balancer bolt until the camshafts are in a neutral low tension position The camshaft flats will be parallel with the camshaft cover rail 1 Fig 1 Identifying Camshaft Neutral Low Tension Position Courtesy of GENERAL MOTORS CORP ...

Page 10: ...r to Torque Reaction Against Timing Drive Chain Notice IMPORTANT 1 Use an open end wrench at the camshaft hex to prevent camshaft engine rotation 2 DO NOT remove the camshaft position actuator bolt at this time 6 Loosen the camshaft position actuator bolt Fig 2 Preventing Camshaft Engine Rotation Using Open End Wrench Courtesy of GENERAL MOTORS CORP ...

Page 11: ...e className 11 51 IMPORTANT Ensure that the tips of the EN 46108 are fully engaged into the timing chain 3 and 4 See Special Tools 7 Install the EN 46108 1 and 2 in order to retain the timing chain See Special Tools Firmly tighten the EN 46108 nuts See Special Tools Fig 3 Identifying EN 46108 Courtesy of GENERAL MOTORS CORP ...

Page 12: ...sembly 8 Mark the timing chain and the respective locations on camshaft position actuators 15 18 9 Remove the camshaft position actuator bolt 10 Remove the camshaft bearing caps and the camshaft Refer to Camshaft Removal Right Side ON VEHICLE REPAIR INSTRUCTIONS CAMSHAFT REPLACEMENT RIGHT SIDE INSTALLATION PROCEDURE Fig 4 Identifying Timing Chain Marks And Their Respective Locations On Gears Sproc...

Page 13: ...e aligned 2 DO NOT tighten the camshaft position actuator bolt at this time 1 Locate the camshafts to the cylinder head and assemble the camshaft actuators to the camshafts 2 Install the camshafts and the camshaft bearing caps Refer to Camshaft Installation Right Side 3 Remove the EN 46108 See Special Tools Fig 1 Identifying Timing Chain Marks And Their Respective Locations On Gears Sprockets And ...

Page 14: ...mshaft position actuators Refer to Camshaft Position Actuator Installation Right Side Intake Second Design and Camshaft Position Actuator Installation Right Side Exhaust Second Design 5 Install the intake camshaft position actuator solenoid Refer to Camshaft Position Actuator Solenoid Valve Solenoid Replacement Bank 1 Right Side Intake 6 Install the camshaft sensors Refer to Camshaft Position Sens...

Page 15: ... Manifold Replacement ON VEHICLE REPAIR INSTRUCTIONS VALVE ROCKER ARM REPLACEMENT LEFT SIDE REMOVAL PROCEDURE 1 Remove the applicable camshaft s Refer to Camshaft Replacement Left Side 2 Remove the rocker arms Refer to Valve Rocker Arm Removal Left Side 3 Clean and inspect the camshaft s and the rocker arm s Repair or replace as necessary Refer to Camshaft Cleaning and Inspection and Valve Lifters...

Page 16: ... arms Refer to Valve Rocker Arm Installation Left Side 2 Install the applicable camshaft s Refer to Camshaft Replacement Left Side ON VEHICLE REPAIR INSTRUCTIONS VALVE ROCKER ARM REPLACEMENT RIGHT SIDE REMOVAL PROCEDURE 1 Remove the applicable camshaft s Refer to Camshaft Replacement Left Side Fig 1 Identifying Valve Rocker Arms Courtesy of GENERAL MOTORS CORP ...

Page 17: ...fer to Valve Rocker Arm Removal Right Side 3 Clean and inspect the camshaft s and the rocker arm s Repair or replace as necessary Refer to Camshaft Cleaning and Inspection and Valve Lifters Cleaning and Inspection ON VEHICLE REPAIR INSTRUCTIONS VALVE ROCKER ARM REPLACEMENT RIGHT SIDE INSTALLATION PROCEDURE Fig 1 View Of Valve Rocker Arm Courtesy of GENERAL MOTORS CORP ...

Page 18: ...stall the applicable camshaft s Refer to Valve Rocker Arm Installation Right Side ON VEHICLE REPAIR INSTRUCTIONS VALVE LIFTER REPLACEMENT LEFT SIDE REMOVAL PROCEDURE 1 Remove the applicable camshaft s Refer to Camshaft Replacement Left Side 2 Remove the rocker arms Refer to Valve Rocker Arm Removal Left Side Fig 1 View Of Valve Rocker Arm Courtesy of GENERAL MOTORS CORP ...

Page 19: ...Lifter Removal Left Side 4 Clean and inspect the camshaft s rocker arm s and lifter s Repair or replace as necessary Refer to Camshaft Cleaning and Inspection and Valve Lifters Cleaning and Inspection ON VEHICLE REPAIR INSTRUCTIONS VALVE LIFTER REPLACEMENT LEFT SIDE INSTALLATION PROCEDURE Fig 1 Identifying Stationary Hydraulic Lash Adjuster SHLA Courtesy of GENERAL MOTORS CORP ...

Page 20: ... to Valve Rocker Arm Installation Left Side 3 Install the applicable camshaft s Refer to Camshaft Replacement Left Side ON VEHICLE REPAIR INSTRUCTIONS VALVE LIFTER REPLACEMENT RIGHT SIDE REMOVAL PROCEDURE 1 Remove the applicable camshaft s Refer to Camshaft Replacement Right Side 2 Remove the rocker arms Refer to Valve Rocker Arm Removal Right Side Fig 1 Identifying Stationary Hydraulic Lash Adjus...

Page 21: ...fters Refer to Valve Lifter Removal Left Side 4 Clean and inspect the camshaft s and the rocker arm s Repair or replace as necessary Refer to Camshaft Cleaning and Inspection and Valve Lifters Cleaning and Inspection ON VEHICLE REPAIR INSTRUCTIONS VALVE LIFTER REPLACEMENT RIGHT SIDE INSTALLATION PROCEDURE Fig 1 View Of SHLAs Courtesy of GENERAL MOTORS CORP ...

Page 22: ...Right Side 3 Install the applicable camshaft s Refer to Camshaft Replacement Right Side ON VEHICLE REPAIR INSTRUCTIONS VALVE STEM OIL SEAL AND VALVE SPRING REPLACEMENT LEFT SIDE Tools Required EN 46106 Flywheel Holding Tool See Special Tools EN 46110 On Vehicle Valve Spring Compressor See Special Tools EN 46116 Valve Stem Seal Remover Installer See Special Tools EN 46117 Valve Stem Key Remover Ins...

Page 23: ...REMOVAL PROCEDURE 1 Remove the starter motor Refer to Starter Motor Replacement LY7 or Starter Motor Replacement LH2 or Starter Motor Replacement LC3 IMPORTANT If the EN 46106 is not installed the crankshaft may rotate See Special Tools If the crankshaft rotates disassembly and reassembly of the entire camshaft timing system may be required 2 Install the EN 46106 in order to prevent crankshaft rot...

Page 24: ...ressed air source See Special Tools 7 Install the EN 46110 above the applicable cylinder as shown See Special Tools CAUTION Compressed valve springs have high tension against the valve spring compressor Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force Use care when compressing or releas...

Page 25: ... 943 in Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage 8 Tighten the EN 46110 valve spring compressor nut 2 See Special Tools 9 Using the EN 46117 remove the valve keepers See Special Tools 10 Loosen the EN 46110 valve spring compressor nut See Special Tools 11 Remove the valve spring retainer Fig 3 View Of Valve Spring Keepers ...

Page 26: ...rinter Friendly View http www2 prodemand com Print Index content tabs module true tab true terms true ymms false className 26 51 12 Remove the valve spring Fig 4 View Of Valve Spring Courtesy of GENERAL MOTORS CORP ...

Page 27: ...terms true ymms false className 27 51 13 Use the EN 46116 1 in order to remove the valve stem seal 2 See Special Tools ON VEHICLE REPAIR INSTRUCTIONS VALVE STEM OIL SEAL AND VALVE SPRING REPLACEMENT LEFT SIDE INSTALLATION PROCEDURE Fig 5 Removing Installing Valve Stem Seal Courtesy of GENERAL MOTORS CORP ...

Page 28: ...emand com Print Index content tabs module true tab true terms true ymms false className 28 51 1 Use the EN 46116 1 in order to install the valve stem seal 2 See Special Tools Fig 1 Removing Installing Valve Stem Seal Courtesy of GENERAL MOTORS CORP ...

Page 29: ...ew http www2 prodemand com Print Index content tabs module true tab true terms true ymms false className 29 51 2 Install the valve spring 3 Install the valve spring retainer Fig 2 View Of Valve Spring Courtesy of GENERAL MOTORS CORP ...

Page 30: ... true tab true terms true ymms false className 30 51 4 Install the EN 46110 above the applicable valve spring as shown See Special Tools Tighten the EN 46110 valve spring compressor nut 2 See Special Tools Fig 3 View Of Installed Valve Spring Compressor Tool Courtesy of GENERAL MOTORS CORP ...

Page 31: ...ORTANT Ensure proper directional placement of valve keepers in the EN 46117 See Special Tools The valve keepers must be installed with the tapered end towards the valve stem seal 5 With the spring compressed install the valve keepers into the EN 46117 See Special Tools Fig 4 Installing Valve Keepers With EN 46117 Courtesy of GENERAL MOTORS CORP ...

Page 32: ...13 See Special Tools 10 Install the spark plugs Refer to Spark Plug Replacement 11 Install the rocker arms and camshafts Refer to Camshaft Replacement Left Side 12 Remove the EN 46106 in order to prevent crankshaft rotation See Special Tools 13 Install the starter motor Refer to Starter Motor Replacement LY7 or Starter Motor Replacement LH2 or Starter Motor Replacement LC3 ON VEHICLE REPAIR INSTRU...

Page 33: ...ial Tools EN 46116 Valve Stem Seal Remover Installer See Special Tools EN 46117 Valve Stem Key Remover Installer See Special Tools J 39313 Spark Plug Port Adapter See Special Tools ON VEHICLE REPAIR INSTRUCTIONS VALVE STEM OIL SEAL AND VALVE SPRING REPLACEMENT RIGHT SIDE REMOVAL PROCEDURE 1 Remove the starter motor Refer to Starter Motor Replacement LY7 or Starter Motor Replacement LH2 or Starter ...

Page 34: ...stall the EN 46106 in order to prevent crankshaft rotation See Special Tools 3 Remove the camshafts and rocker arms Refer to Camshaft Replacement Right Side 4 Remove the spark plug from the applicable cylinder Refer to Spark Plug Replacement 5 Install the J 39313 to the applicable cylinder See Special Tools 6 Connect the J 39313 to a compressed air source See Special Tools 7 Install the EN 46110 a...

Page 35: ...mpressor can be ejected from the valve spring compressor with intense force Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys Failing to use care may cause personal injury NOTE Do not compress the valve springs less than 24 0 mm 0 943 in Contact between the valve spring retainer and the valve stem oil seal c...

Page 36: ...e true tab true terms true ymms false className 36 51 9 Using the EN 46117 remove the valve keepers See Special Tools 10 Loosen the EN 46110 valve spring compressor nut See Special Tools 11 Remove the valve spring retainer Fig 3 View Of Valve Spring Keepers Courtesy of GENERAL MOTORS CORP ...

Page 37: ...inter Friendly View http www2 prodemand com Print Index content tabs module true tab true terms true ymms false className 37 51 12 Remove the valve springs Fig 4 View Of Valve Spring Courtesy of GENERAL MOTORS CORP ...

Page 38: ...erms true ymms false className 38 51 13 Use the EN 46116 1 in order to remove the valve stem seal 2 See Special Tools ON VEHICLE REPAIR INSTRUCTIONS VALVE STEM OIL SEAL AND VALVE SPRING REPLACEMENT RIGHT SIDE INSTALLATION PROCEDURE Fig 5 Removing Installing Valve Stem Seal Courtesy of GENERAL MOTORS CORP ...

Page 39: ...emand com Print Index content tabs module true tab true terms true ymms false className 39 51 1 Use the EN 46116 1 in order to install the valve stem seals 2 See Special Tools Fig 1 Removing Installing Valve Stem Seal Courtesy of GENERAL MOTORS CORP ...

Page 40: ...ew http www2 prodemand com Print Index content tabs module true tab true terms true ymms false className 40 51 2 Install the valve spring 3 Install the valve spring retainer Fig 2 View Of Valve Spring Courtesy of GENERAL MOTORS CORP ...

Page 41: ... true tab true terms true ymms false className 41 51 4 Install the EN 46110 above the applicable valve spring as shown See Special Tools Tighten the EN 46110 valve spring compressor nut 2 See Special Tools Fig 3 View Of Installed Valve Spring Compressor Tool Courtesy of GENERAL MOTORS CORP ...

Page 42: ...ORTANT Ensure proper directional placement of valve keepers in the EN 46117 See Special Tools The valve keepers must be installed with the tapered end towards the valve stem seal 5 With the spring compressed install the valve keepers into the EN 46117 See Special Tools Fig 4 Installing Valve Keepers With EN 46117 Courtesy of GENERAL MOTORS CORP ...

Page 43: ...s 9 Remove the J 39313 See Special Tools 10 Install the spark plugs Refer to Spark Plug Replacement 11 Install the rocker arms and camshafts Refer to Camshaft Replacement Right Side 12 Remove the EN 46106 See Special Tools 13 Install the starter motor Refer to Starter Motor Replacement LY7 or Starter Motor Replacement LH2 or Starter Motor Replacement LC3 ON VEHICLE REPAIR INSTRUCTIONS CYLINDER HEA...

Page 44: ...dary timing chain Refer to Secondary Camshaft Drive Chain Replacement Left Side 2 Remove the oil level indicator Refer to Oil Level Indicator and Tube Replacement 3 Remove the heat shield from the coolant temperature sensor and disconnect the coolant temperature sensor electrical connector Fig 1 View Of Coolant Temperature Sensor And Electrical Connector Courtesy of GENERAL MOTORS CORP ...

Page 45: ...r steering pipes and or hoses 7 Remove the power steering pump bolts Refer to Power Steering Pump Removal 8 Remove the surge tank hose from the bracket at the rear of the cylinder head 9 Remove the wiring harness bracket from the rear of the cylinder head 10 Remove the catalytic converter Refer to Catalytic Converter Replacement Left Side LY7 11 Remove the oil level indicator Refer to Oil Level In...

Page 46: ...nd com Print Index content tabs module true tab true terms true ymms false className 46 51 13 Remove the cylinder head with the exhaust manifold Refer to Cylinder Head Removal Right Side Fig 3 View Of Left Cylinder Head Courtesy of GENERAL MOTORS CORP ...

Page 47: ...ssary perform the following steps 1 Remove the exhaust manifold from the cylinder head Refer to Exhaust Manifold Removal Left Side 2 Disassemble the cylinder head Refer to Cylinder Head Disassemble ON VEHICLE REPAIR INSTRUCTIONS CYLINDER HEAD REPLACEMENT LEFT SIDE INSTALLATION PROCEDURE 1 If necessary perform the following steps 1 Assemble the cylinder head Refer to Cylinder Head Assemble 2 Instal...

Page 48: ...dly View http www2 prodemand com Print Index content tabs module true tab true terms true ymms false className 48 51 2 Install a NEW cylinder head gasket Fig 1 View Of Left Cylinder Head Gasket Courtesy of GENERAL MOTORS CORP ...

Page 49: ...he oil level indicator Refer to Oil Level Indicator and Tube Replacement 6 Install the catalytic converter to the exhaust manifold Refer to Catalytic Converter Replacement Left Side LY7 7 Install the wiring harness bracket to the rear of the cylinder head 8 Install the surge tank hose to the bracket at the rear of the cylinder head 9 Install the power steering pump bolts Refer to Power Steering Pu...

Page 50: ... 11 Disconnect the wiring harness electrical connector located at the side of the cylinder head NOTE Refer to Fastener Notice 12 Install the wiring harness ground to the cylinder head Tighten Tighten the wiring harness ground bolt to 10 N m 89 lb in Fig 3 View Of Left Cylinder Head Wiring Harness Ground Bolt Courtesy of GENERAL MOTORS CORP ...

Page 51: ...he coolant temperature sensor electrical connector heat shield 14 Install the oil level indicator Refer to Oil Level Indicator and Tube Replacement 15 Install the left bank secondary timing chain Refer to Secondary Camshaft Drive Chain Replacement Left Side Fig 4 View Of Coolant Temperature Sensor And Electrical Connector Courtesy of GENERAL MOTORS CORP ...

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Cadillac STS 2006, Repair Instructions

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