NO.16 HIGH OIL CONSUMPTION/LEAKAGE [MZR-CD (RF Turbo)]

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


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	Note • Do not remove the turbocharger. Remove parts for easier access to inspect the turbocharger. Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with housing on the vehicle. Is there any problem?	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 the turbocharger. Is there any problem?	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 housing on the 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 off oil 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 off oil 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 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 off engine oil.
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? (See COMPRESSION INSPECTION [MZR-CD (RF Turbo)].)	Yes	Inspect oil leakage from outside of the engine.
10		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 diagnostic index to service any additional symptoms. • If malfunction remains, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)