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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1719 (Engine Mechanical - 3.6L (4 Of 6)) >> Repair Instructions - Off Vehicle (2 Of 4) >> Cylinder Head Assemble (LLT or LCS)

Cylinder Head Assemble (LLT or LCS)

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

For equivalent regional tools, refer to Special Tools .

    Fig 1: Check Valve
    GM2164001Courtesy of GENERAL MOTORS CORP.
  1. Use lubricant included with EN 46122:  remover/installer to lubricate outside of new check valve (1).
  2. With the check ball end of the check valve facing UP, away from the head, insert the NEW check valve into the check valve bore in the cylinder head.
    3. Fig 2: Tapping Check Valve Into Place
    GM2164004Courtesy of GENERAL MOTORS CORP.
  3. Place collar EN 46122-2 (1) over the new check valve with the slightly-larger inside diameter of the collar DOWN toward the cylinder head.
  4. Using the driver EN 46122-1 (2), lightly tap the new check valve into place until the driver stops against the top of the collar.
    5. Fig 3: Inspecting Camshaft Position Actuator Oil Feed Check Valve
    GM1492613Courtesy of GENERAL MOTORS CORP.
  5. Inspect the camshaft position actuator oil feed check valves in order to ensure they are properly installed in the cylinder head. The camshaft position actuator oil feed check valve should be flush to 2 mm (0.0787 in) below the cylinder head deck surface (a).
    6. Fig 4: View of Threaded Plugs and Cylinder Head
    GM1977967Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  6. Install the cylinder head coolant threaded plugs and tighten to 31 N.m (23 lb ft).
    7. Fig 5: View of Plugs and Cylinder Head
    GM1977963Courtesy of GENERAL MOTORS CORP.
  7. Install the NEW cylinder head oil gallery expansion plugs.
    8. Fig 6: View of Tool EN 46116 and Cylinder Head
    GM1977962Courtesy of GENERAL MOTORS CORP.
  8. Place the valve stem oil seals onto the guides.
    9. NOTE: NEVER reuse a valve stem oil seal. Always use new seals when assembling the cylinder head.
  9. Mount a new valve stem oil seal using the EN 46116:  remover/installer.
    10. NOTE: Force should only be applied to the valve spring contact area of the new valve stem oil seal during installation.
  10. Push and twist the valve stem oil seal into position on the valve guide until the seal positively locks on the guide using the EN 46116:  remover/installer.
  11. Lubricate the valve stem and valve guide ID with clean engine oil GM P/N 12345501 (Canadian P/N 992704) or equivalent.
    12. Fig 7: View of Oil Seal and Valve Guide
    GM1977960Courtesy of GENERAL MOTORS CORP.
    NOTE: The valve stem oil seal must not come loose from the valve guide when the valve is installed.
  12. Insert the valve into the valve guide until it bottoms on the valve seat.
    13. Fig 8: View of Valve Spring Retainer Assembly
    GM1977958Courtesy of GENERAL MOTORS CORP.
  13. Position the valve spring on the spring seat.
  14. Place the valve spring retainer onto the valve spring.
    15. Fig 9: View of Compressor and Valve Springs
    GM1977952Courtesy of GENERAL MOTORS CORP.
    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.
  15. Compress the valve spring using the J 8062:  compressor and the EN 46119:  adapter.
    16. Fig 10: View Of Valve Keepers With Special Tool EN 46117
    GM1210911Courtesy of GENERAL MOTORS CORP.
    NOTE: Ensure proper directional placement of valve keepers in the EN 46117:  remover/installer. The valve keepers must be installed with the tapered end towards the valve stem seal.
  16. With the spring compressed, install the valve keepers into the EN 46117:  remover/installer.
    17. Fig 11: View of Keeper and Tool EN 46119
    GM1977949Courtesy of GENERAL MOTORS CORP.
  17. Place the keepers into position by pushing the tool downward and releasing tension on the EN 46119:  adapter and the J 8062:  compressor.
  18. Verify that the valve keepers are installed by placing a rag over the valve tip and tapping with a dead-blow hammer.
    19. Fig 12: View of Engine Coolant Temperature Sensor & Cylinder Head
    GM1977948Courtesy of GENERAL MOTORS CORP.
  19. Install the engine coolant temperature (ECT) sensor and tighten the ECT sensor to 30 N.m (22 lb ft).
    20. Fig 13: View of Fuel Rail, Bolts and Cylinder Head
    GM1977944Courtesy of GENERAL MOTORS CORP.
  20. Install the fuel rail with injectors into the cylinder head evenly.
  21. Hand tighten the two outer fuel rail bolts to seat the injector in the injector bores.
  22. Start and hand tighten the remaining fuel rail bolts.
    1. Tighten the fuel rail bolts in sequence to 10 N.m (89 lb in) .
    2. Tighten the fuel rail bolts in sequence a second time to 10 N.m (89 lb in) .
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