NO.16 HIGH OIL CONSUMPTION/LEAKAGE


16	HIGH OIL CONSUMPTION/LEAKAGE
DESCRIPTION	The oil consumption is excessive.
POSSIBLE CAUSE	• Air cleaner element malfunction (damaged, poor installation) • Improper dipstick • Improper engine oil viscosity • Engine internal parts malfunction • Metering oil pump malfunction • Improper operation of metering oil pump control system • Oil leakage from lubrication system parts and them joints (oil pump, oil filter, oil cooler, housing oil nozzle, manifold oil nozzle etc.)


STEP	INSPECTION	RESULTS	ACTION
1	Inspect for the following: • External leakage (lubrication system parts and their joints.) • Proper dipstick • Proper engine oil viscosity • Damaged and/or poor installation air cleaner element Are all the items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Perform the metering oil pump control inspection. (See Metering Oil Pump Control Inspection.) Does the metering oil pump control properly?	Yes	Overhaul the engine and repair or replace the malfunctioning parts. (See Engine Workshop Manual.)
2		No	Repair or replace the malfunctioning parts, according to the metering oil pump control inspection results.
3	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. • If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis.