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Pinpoint Test A: Low Oil Pressure

WARNING: This page is about a different car, the 2013 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK THE CRANKSHAFT END PLAY 
    • Check the crankshaft end play. Refer to CRANKSHAFT END PLAY .
    • Is the crankshaft end play within specification? 
    • Yes  : GO to A2.
    • No  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
  2. A2 VERIFY THE CAMSHAFT BEARING CAPS ARE NOT DAMAGED AND TIGHT 
    • Check that the camshaft bearing caps are not damaged and the bolts are properly tightened. Refer to the SPECIFICATION chart in the appropriate engine information.
    • Are the camshaft bearing caps loose or damaged? 
    • Yes  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
    • No  : GO to A3.
  3. A3 CHECK CAMSHAFT JOURNAL-TO-BEARING CLEARANCE 
    • Check the camshaft journal-to-bearing clearance. Refer to the SPECIFICATION chart in the appropriate engine information.
    • Is camshaft journal-to-bearing clearance within specification? 
    • Yes  : GO to A4.
    • No  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
  4. A4 CHECK FOR RESTRICTED OIL FLOW 
    • Verify the oil supply and return passages are not plugged and clean of debris. Refer to the oil flow chart in the appropriate engine section.
    • Is oil flow restricted? 
    • Yes  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
    • No  : GO to A5.
  5. A5 CHECK THE TIMING CHAIN TENSIONERS FOR DAMAGE AND VERIFY THE BOLTS ARE TIGHT 
    • Check that the timing chain tensioners are not damaged or the bolts are loose. Refer to the SPECIFICATION chart in the appropriate engine information.
    • Are the timing chain tensioners damaged or bolts loose? 
    • Yes  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
    • No  : GO to A6.
  6. A6 CHECK THE OIL PUMP PICKUP TUBE AND SCREEN FOR DAMAGE 
    • Check that the oil pump pickup tube and screen is not plugged, cracked or that the bolts are loose. Refer to the SPECIFICATION chart in the appropriate engine information.
    • Is the oil pump screen and pickup tube damaged or loose? 
    • Yes  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
    • No  : GO to A7.
  7. A7 CHECK THE OIL PUMP FOR DAMAGE 
    • Verify the oil pump is not damaged.
    • Is oil pump damaged? 
    • Yes  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
    • No  : GO to A8.
  8. A8 CHECK CRANKSHAFT MAIN BEARING JOURNAL-TO-BEARING CLEARANCE 
    • Check the crankshaft main bearing journal-to-bearing clearance. Refer to the SPECIFICATION chart in the appropriate engine information.
    • Is crankshaft main bearing journal-to-bearing clearance within specification? 
    • Yes  : GO to A9.
    • No  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
  9. A9 CHECK CONNECTING ROD BEARING JOURNAL-TO-BEARING CLEARANCE 
    • Check the connecting rod bearing journal-to-bearing clearance. Refer to the SPECIFICATION chart in the appropriate engine information.
    • Is connecting rod bearing journal-to-bearing clearance within specification? 
    • Yes  : The concern may have been caused by debris or an incorrect assembly. REPEAT the oil pressure test.
    • No  : REPAIR as necessary. Refer to the appropriate Engine information for the procedure.
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