NO.16 HIGH OIL CONSUMPTION/LEAKAGE [MZ-CD 1.6 (Y6)]

B3E010318881W80


16	HIGH OIL CONSUMPTION/LEAKAGE
DESCRIPTION	• The 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 viscosity • Engine oil level Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Remove the parts necessary to inspect 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 problem?	Yes	Replace the turbocharger.
2		No	Go to the next step.
3	Inspect if turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger. Is there any problem?	Yes	Replace the turbocharger.
3		No	Go to the next step.
4	Turn turbocharger compressor wheel by hand. Does wheel turn easily and smoothly?	Yes	Go to the next step.
4		No	Replace the turbocharger.
5	Inspect if turbocharger turbine wheel is damaged, cracked or interfering with housing on vehicle. Note • Inspect all fins on each turbine wheel. Is there any problem?	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 the vehicle, then go to the next step.
7		No	Go to the next step.
8	Is any engine oil found around the oil pipes attached on the turbocharger center housing?	Yes	If oil leaks from the 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 the air intake pipes or hoses?	Yes	Wipe engine oil off.
9		No	The turbocharger is normal. Install all parts removed in Step 2. Then go to the next step.
10	Is the engine compression correct?	Yes	Inspect for oil leakage from outside of engine.
10	Is the engine compression correct?	No	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.
11	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZ-CD 1.6 (Y6)].) • If the malfunction remains, inspect related Service Information and perform repair or diagnosis. - If the vehicle is repaired, troubleshooting is completed. - If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)