Buick Regal: Cylinder Head Assemble

Special Tools

• EN-50717 Valve Spring Compressor
• EN-9666 Valve Spring Tester
• EN-43963 Valve Spring Compressor (off car)

For equivalent regional tools, refer to Special Tools.

1.

CAUTION: Refer to Component Fastener Tightening Caution.

CAUTION: In order to avoid damage, install the spark plugs after the cylinder head has been installed on the engine.

Install NEW cylinder head plugs. Coat the plugs with sealer. Refer to Adhesives, Fluids, Lubricants, and Sealers.

2. Install the water jacket hole plugs (1) in the top of the cylinder head. Tighten the plugs to 50 N.m (37 lb ft).

3.

Install the oil gallery plug (1) in the rear of the cylinder head. Tighten the plug to 40 N.m (30 lb ft).

4. Inspect the valve springs for the following conditions:

• Expanded height
• Unparallel spring ends
• Spring tension using EN-9666 tester
• Any distorted springs should be replaced

5.

Inspect the valves and the valve seats. Refer to Valve and Seat Grinding.

6. Lubricate the valves. Refer to Adhesives, Fluids, Lubricants, and Sealers.

7. Install the valves (1, 2). Replace the valves, if required.

8.

NOTE: Always use NEW valve stem oil seals when assembling the cylinder head.

Install the NEW valve seals (1). Fully seat the seals on the valve guides.

9.

Install the springs (1).

10.

WARNING: 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 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.

CAUTION: Do not compress the valve springs to less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.

Install the retainers and keys using the following procedure:

1. Install the retainer (2).
2. Using the EN-50717 compressor and the EN-43963 adapter, compress the valve spring.
3. Install the valve keys (1).
4. Slowly release the compression from the valve/spring assembly.
5. Inspect for proper valve key seating.

11.

Lubricate the camshaft position sensor O-ring with clean engine oil.

CAUTION: Refer to Fastener Caution.

12. Install the exhaust camshaft position sensor (2) and bolt (1). Tighten the bolt to 10 N.m (89 lb in).

13.

Lubricate the camshaft position sensor O-ring with clean engine oil.

14. Install the intake camshaft position sensor (2) and bolt (1). Tighten the bolt to 10 N.m (89 lb in).

BALANCER SHAFT WITH OIL PUMP DISASSEMBLE

1. Oil Pump Suction Pipe Bolt
2. Oil Pump Screen Assembly with Suction Pipe
3. Oil Pump Screen Gasket
   NOTE: Discard the gasket.
4. Oil Pump Assembly Bolt
5. Oil Pump Assembly
6. Oil Pump Cover
7. Oil Pump Locating Pin
8. Balancer Shaft Module

BALANCER SHAFT WITH OIL PUMP CLEANING AND INSPECTION

Preliminary Procedures

1. Completely inspect the balancer with oil pump shaft assembly and components.

2. Clean all mating surfaces.

3. Inspect all threaded holes for damage.

4. Inspect the oil pump screen assembly.

1. Oil Pump Assembly
2. Oil Pump Cover
3. Balancer Shaft Module
4. Oil Pump Locating Pin
5. Oil Pump Screen Assembly with Suction Pipe

BALANCER SHAFT WITH OIL PUMP ASSEMBLE

1. Balancer Shaft Module
2. Oil Pump Locating Pin
3. Oil Pump Cover
4. Oil Pump Assembly
5. Oil Pump Assembly Bolt
   CAUTION: Refer to Fastener Caution.
   Tighten 10 N.m (89 lb in)
6. Oil Pump Screen Gasket
   NOTE: Use NEW gasket.
7. Oil Pump Screen Assembly with Suction Pipe
8. Oil Pump Suction Pipe Bolt
   Tighten 10 N.m (89 lb in)

CAMSHAFT COVER AND COMPRESSOR AIR INTAKE TURBOCHARGER CLEANING AND INSPECTION

Positive Crankcase Ventilation System Overview

Preliminary Procedure

The tamper-proof positive crankcase ventilation system includes components that may be replaced if necessary. The system may include an outlet duct connected to the end of the Positive Crankcase Ventilation Tube. If any component is suspect, refer to the inspection procedures and individual replacement procedures before attempting to disassemble the PCV system. Be careful when moving the assembled components with tamper-proof fittings to avoid stress on the connections.

1. Camshaft Cover
   NOTE: In the event that the camshaft cover requires replacing, the PCV hose at the air outlet duct and turbocharger will be removed by cutting and/or prying at the connection. The air outlet duct and turbocharger must remain intact in order to reinstall these components.
   Procedure
   1. Thoroughly clean the camshaft cover and mating surfaces. Inspect each component, Orings, and fasteners, and replace as necessary.
   2. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
   3. Refer to Camshaft Cover Replacement if the camshaft cover does not pass inspection.
2. Positive Crankcase Ventilation Tube
   NOTE: All PCV valves are tamper-proof and cannot be serviced.
   Procedure
   Inspect the PCV connection fittings and tubes. Replace the Positive Crankcase Ventilation Tube if suspect.
   NOTE: The PCV fitting is tamper-proof and cannot be serviced. A new PCV tube and valve are included with a new turbocharger assembly.
   NOTE: On earlier designs of this system the fastener at the PCV fitting on the turbocharger was not tamper-proof. To aid in disassembly or removal, this fastener can be removed if it is not tamper-proof.
   Procedure
   Completely inspect the turbocharger and all other engine components that may cause similar conditions before replacing the turbocharger.
3. Positive Crankcase Ventilation Tube
   NOTE: All PCV valves and fittings are tamper-proof and cannot be serviced.
   Procedure
   Inspect the PCV connection fittings and tubes. Replace the Positive Crankcase Ventilation Tube if suspect.
   NOTE: The air cleaner outlet duct is equipped with a tamper proof connection that should NOT be removed unless the PCV tube or air cleaner outlet duct is being replaced. Loosening the air cleaner outlet duct clamps will allow the duct to be disconnected from the air cleaner assembly and turbocharger for repositioning without removing the tamper proof connection.
   Procedure
   Inspect the duct and hose, or the connection if the duct is not attached to the hose. Replace any components that are suspect.

Camshaft Cover - Top

Preliminary Procedure

1. Thoroughly clean the camshaft cover and mating surfaces. Inspect each component, O-rings, and fasteners, and replace as necessary.

2. Ensure proper use of room temperature vulcanizing (RTV) sealant.

1. Engine Coolant Air Bleed Hose
2. Engine Coolant Air Bleed Pipe
3. Engine Coolant Air Bleed Pipe O-Ring
4. Camshaft Cover
5. Camshaft Position Actuator Solenoid Valve - Intake
6. Camshaft Cover Plug
   CAUTION: Refer to Fastener Caution.
   Tighten 35 N.m (26 lb ft)
7. Vacuum Pump Seal
   Special Tools
   DT 45866 Input Shaft Seal Installer
   Equivalent regional tools: Special Tools.
8. Ignition Coil
9. Camshaft Position Actuator Solenoid Valve - Exhaust

Camshaft Cover - Bottom

Preliminary Procedure

Inspect each component, O-rings, and fasteners, and replace as necessary.

1. Camshaft Cover Locating Pin [2x]
2. Positive Crankcase Ventilation Valve
3. Spark Plug Shield Seal
   Special Tools
   EN 34115 Sprocket Bearing Installer
   Equivalent regional tools: Special Tools.

Turbocharger and Components Cleaning and Inspection

1. Turbocharger
   Procedure
   1. Clean all mating surfaces.
   2. Inspect all threaded holes for damage.
      NOTE: PCV fluids and combustion product buildup are common and not a sign of failure.
   3. Inspect the compressor and turbine blades for bent or broken conditions, and foreign material.
      NOTE: Do not replace the turbocharger if cracks are found on the turbocharger inlet flange partition wall. Replacement should only be performed if external leaks are present or a section is loose or missing.
   4. Inspect the turbocharger compressor inlet, compressor outlet, turbine inlet, and turbine outlet surfaces for damage. Replace the turbocharger if damage is found.
      NOTE: A new PCV tube and fitting are included with a new turbocharger assembly.
   5. Replace the turbocharger if damage is found.
2. Turbocharger Bypass Valve Solenoid
   Procedure
   Inspect the bypass valve solenoid for damage. Replace if necessary.
3. Turbocharger Wastegate Regulator Solenoid Valve
   NOTE: Do not disassemble solenoid valve from bracket.
   Procedure
   Inspect the solenoid valve and bracket for damage. Replace if necessary.
4. Turbocharger Wastegate Regulator Solenoid Valve Hose [3x]
   Procedure
   Inspect the turbocharger wastegate regulator solenoid hoses for damage. Replace the hoses if necessary.
5. Turbocharger Wastegate Actuator
   Procedure
   1. Inspect the turbocharger wastegate actuator.
   2. Inspect the wastegate actuator rod for damage or tampering.
   3. Replace the wastegate actuator if damage is found.
6. Turbocharger Oil Feed Pipe
   Procedure
   Inspect the pipe. Replace if necessary.
7. Turbocharger Coolant Return Pipe
   Procedure
   Inspect the pipe. Replace if necessary.
8. Turbocharger Coolant Feed Pipe
   Procedure
   Inspect the pipe. Replace if necessary.
9. Turbocharger Oil Return Pipe
   Procedure
   Inspect the pipe. Replace if necessary.

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