NO.18 HIGH OIL CONSUMPTION/LEAKAGE [MZR-CD 2.2]

id0103f3821600

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	Inspect 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 the turbocharger air inlet pipe. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].) Note • Do not remove the turbocharger. Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with the housing on the vehicle. (See TURBOCHARGER INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
2		No	Go to the next step.
3	Inspect if the turbocharger compressor wheel locknut is loose or has fallen down inside the turbocharger. Is there any malfunction?	Yes	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
3		No	Go to the next step.
4	Inspect the turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly?	Yes	Go to the next step.
4		No	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
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. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
5		No	Go to the next step.
6	Is any engine oil found inside the turbocharger turbine housing?	Yes	If the excessive amount of oil is found: • Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].) If the 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 oil pipes attached on the 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, then go to the next step.
9	Is any engine oil found inside air intake pipes or hoses?	No	Turbocharger is normal. • Reinstall all removed parts in Step 2, then go to the next step.
10	Inspect the engine compression. (See COMPRESSION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	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.
10		No	Inspect for oil leakage from outside of the engine. Repair or replace the malfunctioning part according to the inspection results.
11	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].) • If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis. ― If the vehicle is repaired, troubleshooting is completed. ― If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.