- Remove the engine under cover (1).
- Remove the main oil gallery plug (2).
- Install the oil pressure gauge with attachment in the position shown in the figure.
- Warm up the engine as follows: Summer 10 min. at 2 000 r/min. Winter 20 min. at 2 000 r/min.
- After warming up, increase the engine speed to 3 000 r/min. (with the engine tachometer), and read the oil pressure gauge.
- 09915-72410: Oil pressure gauge attachment
- 09915-74521: Oil pressure gauge hose
- 09915-74532: Oil pressure gauge attachment
- 09915-77331: Meter (for high pressure)
- Oil gallery plug (M8): 18 Nm (1.8 kgf·m, 13.0 lb·ft)