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Home >> Cadillac >> 2006 >> Escalade AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 786 (Engine Mechanical - 8.1L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Cylinder Head Cleaning and Inspection >> Valve Spring Inspection and Measurement

Valve Spring Inspection and Measurement

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the valve springs for broken coils or coil ends.
  2. Fig 1: Measuring Valve Spring Tension
    GM4960Courtesy of GENERAL MOTORS CORP.
  3. Use the J 9666  in order to measure the valve spring force. Refer to Engine Mechanical Specifications .
  4. IMPORTANT: Add a maximum of one shim up to 0.726 mm (0.030 in) thick to increase tension.
  5. If the valve spring tension is low, use a shim to increase tension.
  6. Recheck the valve spring tension, a valve spring that does not meet specification must be replaced.