LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 262 (Engine Mechanical - 4.8L, 5.3L, 6.0L Or 6.2L (1 Of 5)) >> Diagnostic Information and Procedures >> Oil Pressure Diagnosis and Testing >> Testing

Oil Pressure Diagnosis and Testing: Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Special Tools Oil Pressure Gage & Adapter
    GM1658100Courtesy of GENERAL MOTORS CORP.
  1. With the vehicle on a level surface, run the vehicle for a few minutes. Allow adequate drain down time, 2-3 minutes, and measure the oil level.
  2. If required, add the recommended grade engine oil and fill the crankcase until the oil level measures full on the oil level indicator.
  3. Run the engine briefly, 10-15 seconds, and verify low or no oil pressure on the vehicle gage or light.
  4. Listen for a noisy valve train or a knocking noise.
  5. Inspect for the following conditions:
    • Oil diluted by water or glycol antifreeze

      Refer to Coolant in Engine Oil  .

    • Foamy oil, which may be caused by a cut or damaged oil pump screen O-ring seal
  6. Remove the oil filter and install the EN-47971  (1). See Special Tools .
  7. Install the J 21867  (2), or equivalent to the EN-47971  (1). See Special Tools .
  8. Run the engine and measure the engine oil pressure.
  9. Compare the readings to Engine Mechanical Specifications (RPO LY2 VIN C)  or Engine Mechanical Specifications (RPO LMG VIN 0)  or Engine Mechanical Specifications (RPO LY5 VIN J)  or Engine Mechanical Specifications (RPO LC9 VIN 3)  or Engine Mechanical Specifications (RPO L76 VIN Y)  or Engine Mechanical Specifications (RPO LY6 VIN K)  or Engine Mechanical Specifications (RPO L92 VIN 8) .
  10. If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
scientia non olet · About LEMON Manuals