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

id0103f1821600

18

HIGH OIL CONSUMPTION/LEAKAGE

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

18	HIGH OIL CONSUMPTION/LEAKAGE
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
1	Verify the following: • Proper dipstick • Proper engine oil viscosity • Engine oil level Are all items normal?	Yes	Go to the next step.
1		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.
2		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.
3		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.
4		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.
5		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.
6		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.
7		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.
8		No	Go to the next step.
9	Is any engine oil found inside air intake pipes or hoses?	Yes	Wipe engine oil off.
9	Is any engine oil found inside air intake pipes or hoses?	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.
10		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.