Pinpoint Test C: Check The Engine Oil Pressure

NOTE: Check and, if necessary, top-up the engine oil level before beginning this test.

NOTE: Where reference is made to 'suitable equipment', this refers to standard workshop equipment. Refer to the operating instructions for your own equipment when performing any tests.

TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
C1: CHECK FOR LOW ENGINE OIL PRESSURE
	1 Remove the oil pressure sensor.
	2 Connect a suitable oil pressure gauge in place of the oil pressure sensor.
	3 Start the engine and check for leaks at the gauge connection.
	4 Allow the engine to idle and monitor the oil pressure.
	5 Raise the engine speed to 2, 500 rpm and monitor the oil pressure.
	Is the oil pressure less than 0.50 bar (7.25 psi) between idle and 2, 500 rpm? Yes GO to C2. No GO to C3.

TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
C2: CHECK FOR LOW ENGINE OIL PRESSURE AT ENGINE SPEEDS GREATER THAN 2, 500 RPM
	1 Raise the engine speed to above 2, 500 rpm and monitor the oil pressure.
	Is the oil pressure less than 1.0 bar (14.5 psi) at engine speeds greater than 2, 500 rpm? Yes Pressure this low may indicate a problem with: oil pump, filtering, clearances within the engine. Check if there are any other indications of engine faults (noise, etc), refer to the symptom chart above. No GO to C3.

TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
C3: CHECK FOR HIGH ENGINE OIL PRESSURE
	1 Monitor the engine oil pressure at varying engine speeds.
	Does the oil pressure reach 4.0 bar (58 psi)? Yes Pressure this high may indicate a blockage in the lubrication system. If this is not resolved, high oil pressure will lead to engine oil leaks and other failures. No If the oil pressure stays in the band between 0.50 bar (7.25 psi) and 1.0 bar (14.5 psi) this would be considered normal.