Oil Pressure Diagnosis and Testing
Special Tools
  • EN-21867-A Oil Pressure Gauge Kit
  • EN-21867-6 Oil Pressure Gauge Adapter
  • EN-47971 Oil Pressure Gauge Adapter

Equivalent regional tools:Special Tools

Oil Filter Pressure Test Procedure

  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 gauge 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. Coolant in Engine Oil
    • Foamy oil, which may be caused by a cut or damaged oil pump screen O-ring seal

    Object ID: 5209364
  6. Remove the oil filter (1).

    7. Object ID: 5209366
  7. Install the EN-47971 Oil Pressure Gauge Adapter (1) and EN-21867-A Oil Pressure Gauge Kit (2), or equivalent.
  8. Run the engine until the engine reaches normal operating temperature and measure the engine oil pressure.
  9. Compare the readings to Engine Mechanical Specifications .
  10. If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
    • Check if the engine oil cooler or oil cooler lines are plugged or damaged.
    • Oil pump-to-engine block bolts loose.
    • Oil pump screen loose, plugged, or damaged.
    • Oil pump screen O-ring seal missing or damaged.
    • Excessive debris in the oil pan and/or oil filter (possibly indicating internal engine damage).
    • Malfunctioning oil pump pressure relief valve.
    • Excessive bearing clearance and/or bearing damage.
    • Cracked, porous, or restricted oil galleries.
    • Oil gallery plugs missing or incorrectly installed. Engine Block Overhaul
    • Malfunctioning valve lifter oil solenoid valve.

Oil Pressure and Temperature Sensor Pressure Test Procedure

  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 gauge 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. Coolant in Engine Oil
    • Foamy oil, which may be caused by a cut or damaged oil pump screen O-ring seal

    Object ID: 5721568
  6. Air Cleaner Outlet Duct Bracket Bolt(1)»Remove
  7. Engine Wiring Harness Retainer(2)@Air Cleaner Outlet Duct Bracket(3)»Remove[2x]

    8. Object ID: 5721569
  8. Retainer(1)»Remove[2x]
  9. Positive Crankcase Ventilation Tube(2)»Disconnect—Plastic Collar Quick Connect Fitting Service

    10. Object ID: 5235833
  10. Air Cleaner Outlet Duct Clamp(1)»Loosen[2x]
  11. Air Cleaner Outlet Duct(2)»Remove

    12. Object ID: 5757450
  12. Disconnect the throttle body electrical connector.
  13. Throttle Body Bolt(1)»Remove[4x]
  14. Throttle Body(2)»Remove
  15. Throttle Body Seal(3)»Remove and DISCARD

    16. Object ID: 5311616
  16. Disconnect the engine oil pressure sensor electrical connector.
  17. Engine Oil Pressure Sensor(1)»Remove
  18. Install the EN-21867-6 Oil Pressure Gauge Adapter (1) and EN-21867-A Oil Pressure Gauge Kit (2), or equivalent.
  19. Run the engine until the engine reaches normal operating temperature and measure the engine oil pressure.
  20. Compare the readings to Engine Mechanical Specifications .
  21. If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
    • Check if the engine oil cooler or oil cooler lines are plugged or damaged.
    • Oil pump-to-engine block bolts loose.
    • Oil pump screen loose, plugged, or damaged.
    • Oil pump screen O-ring seal missing or damaged.
    • Excessive debris in the oil pan and/or oil filter (possibly indicating internal engine damage).
    • Malfunctioning oil pump pressure relief valve.
    • Excessive bearing clearance and/or bearing damage.
    • Cracked, porous, or restricted oil galleries.
    • Oil gallery plugs missing or incorrectly installed. Engine Block Overhaul
    • Malfunctioning valve lifter oil solenoid valve.

    Object ID: 5311616

    Caution: Refer to Component Fastener Tightening Caution.

  22. Engine Oil Pressure Sensor(1)»Install and tighten—Fastener Specifications
  23. Connect the engine oil pressure sensor electrical connector.

    24. Object ID: 5757450
  24. Clean all sealing surfaces.
  25. Throttle Body Seal(3)»Install NEW
  26. Throttle Body(2)»Install

    27. Caution: Refer to Fastener Caution.

  27. Throttle Body Bolt(1)»Install and tighten[4x]—Fastener Specifications
  28. Connect the throttle body electrical connector.

    29. Object ID: 5235833
  29. Air Cleaner Outlet Duct(2)»Install
  30. Air Cleaner Outlet Duct Clamp(1)»Tighten[2x]—Fastener Specifications

    31. Object ID: 5721569
  31. Positive Crankcase Ventilation Tube(2)»Connect—Plastic Collar Quick Connect Fitting Service
  32. Retainer(1)»Install[2x]

    33. Object ID: 5721568
  33. Engine Wiring Harness Retainer(2)@Air Cleaner Outlet Duct Bracket(3)»Install[2x]
  34. Air Cleaner Outlet Duct Bracket Bolt(1)»Install and tighten—Fastener Specifications