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NO.18 HIGH OIL CONSUMPTION/LEAKAGE [MZR-CD (RF Turbo)]

id0103f1821600

18 | HIGH OIL CONSUMPTION/LEAKAGE
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DESCRIPTION | • Oil consumption is excessive.
POSSIBLE CAUSE | • Improper engine oil level • Improper dipstick • Improper engine oil viscosity • Engine internal parts malfunction • Oil leakage • Turbocharger malfunction

Diagnostic Procedure

STEP | INSPECTION | RESULTS | ACTION
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1 | Verify the following: • Proper dipstick • Proper engine viscosity • Engine oil level Are all items normal? | Yes | Go to the next step.
No | Service if necessary. Repeat Step 1.
2 | Remove if necessary to inspect the turbocharger. Note • Do not remove the turbocharger. Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle. Is there any malfunction? | Yes | Replace the turbocharger.
No | Go to the next step.
3 | Inspect if the turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger. Is there any malfunction? | Yes | Replace the turbocharger.
No | Go to the next step.
4 | Turn the turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly? | Yes | Go to the next step.
No | Replace the turbocharger.
5 | Inspect if the turbocharger turbine wheel is damaged, cracked or interfering with the housing on the vehicle. Note • Inspect all fins on each turbine wheel. Is there any malfunction? | Yes | Replace the turbocharger.
No | Go to the next step.
6 | Is any engine oil found inside the turbocharger turbine housing? | Yes | Excessive amount of oil is found: Replace the turbocharger. Small amount of oil is found: Wipe oil off of the vehicle, then go to the next step.
No | Go to the next step.
7 | Is any engine oil found inside the turbocharger compressor housing? | Yes | Wipe oil off of vehicle, then go to the next step.
No | Go to the next step.
8 | Is any engine oil found around oil pipes attached on turbocharger center housing? | Yes | If oil leaks from a damaged pipe, replace the oil pipe. Then, go to the next step.
No | Go to the next step.
9 | Is any engine oil found inside air intake pipes or hoses? | Yes | Wipe engine oil off.
No | Turbocharger is normal. Install all parts removed in Step 2. Then go to the next step.
10 | Is the engine compression correct? (See COMPRESSION INSPECTION [MZR-CD (RF Turbo)].) | Yes | Inspect for oil leakage from outside of engine.
No | Inspect 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.
11 | Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD (RF Turbo)].) • If the malfunction remains, inspect the related Service Information and perform repair or diagnosis. - If the vehicle is repaired, troubleshooting completed. - If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if later calibration is available. Retest.