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Home >> GMC >> 2021 >> Yukon XL AT4 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions ( 5 Of 12) >> Repair Instructions >> Cylinder Head Overhaul >> Assemble Procedure

Assemble Procedure

GM5577620Courtesy of GENERAL MOTORS COMPANY
  1. Exhaust Valve (7) - Install [ 4x ]
  2. Intake Valve (6) - Install [ 4x ]
  3. Lubricate the valve stem and valve guide ID with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers
  4. Valve Stem Oil Seal (5) - Install NEW [ 8x ]
  5. Valve Spring (4) - Install [ 8x ]
  6. 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.

  7. Valve Spring Cap (3) - Install [ 8x ]
  8. EN-8062  Valve Spring Compressor (1) - Install
  9. Valve Stem Key (2) - Install [ 8x ]