NO.12 HIGH OIL CONSUMPTION/LEAKAGE [WL-3]
id0103b5913200
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12
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High oil consumption/leakage
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DESCRIPTION
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• Oil consumption is excessive.
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POSSIBLE CAUSE
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• Improper engine oil level
• Improper dipstick
• Improper engine oil viscosity
• Engine internal parts malfunction
• Oil leakage
• Turbocharger malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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• Verify the following:
• Are all items normal?
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Yes
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Go to the next step.
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No
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Service if necessary.
Repeat Step 1.
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2
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• Remove parts necessary to inspect the turbocharger.
• Do not remove the turbocharger.
• Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with the housing on the vehicle.
• Is there any problem?
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Yes
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Replace the turbocharger.
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No
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Go to the next step.
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3
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• Inspect if the turbocharger compressor wheel locknut is loose or has fallen down inside the turbocharger.
• Is there any problem?
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Yes
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Replace the turbocharger.
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No
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Go to the next step.
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4
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• Turn the turbocharger compressor wheel by hand.
• Does the wheel turn easily and smoothly?
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Yes
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Go to the next step.
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No
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Replace the turbocharger.
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5
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• Inspect if the turbocharger turbine wheel is damaged, cracked or interfering with the housing on the vehicle.
• Is there any problem?
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Yes
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Replace the turbocharger.
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No
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Go to the next step.
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6
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• Is any engine oil found inside the turbocharger turbine housing?
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Yes
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Excessive amount of oil is found:
• Replace the turbocharger.
Small amount of oil is found:
• Wipe oil of the vehicle, then go to the next step.
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No
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Go to the next step.
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7
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• Is any engine oil found inside the turbocharger compressor housing?
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Yes
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Wipe oil out of the vehicle, then go to the next step.
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No
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Go to the next step.
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8
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• Is any engine oil found around the oil pipes attached to the turbocharger center housing?
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Yes
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If oil leaks from a damaged pipe, replace the oil pipe.
Go to the next step.
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No
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Go to the next step.
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9
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• Is any engine oil found inside the air intake pipes or hoses?
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Yes
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Wipe off the engine oil.
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No
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The turbocharger is normal.
Install all removed parts in Step 2.
Then go to the next step.
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10
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• Measure the engine compression.
• Is the compression normal?
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Yes
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Inspect oil leakage from the outside of the engine.
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No
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Inspect for the following:
• Damaged valve seat
• Worn valve stem and valve guide
• Worn or stuck piston ring
• Worn piston, piston ring or cylinder
Service if necessary.
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11
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• Verify the test results. If normal, return to the diagnostic index to service any additional symptoms.
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