Oil Pressure Measurement
Slide out the rubber boot [A].
Disconnect the oil pressure switch lead [B] from the ter-
minal screw [C].
Unscrew the oil pressure switch [D].
Measure the oil pressure after the engine is warmed up.
Attach the oil pressure gauge [B] and adapter [C] to the
Oil Pressure Switch [A]
Special Tools - Oil Pressure Gauge, 5 kgf/cm²: 57001-125
Oil Pressure Gauge Adapter, PT 1/8: 57001
Start the engine and warm up the engine.
Run the engine at the specified speed, and read the oil
If the oil pressure is much lower than the standard, check
the oil pump, oil pressure relief valve, and/or crankshaft
bearing wear and con-rod big end bearing insert wear im-
If the reading is much higher than the standard, check the
oil screen first, and the oil passages for dirt or clogging.
Also, replace the oil filter.
340 440 kPa (3.5 4.5 kgf/cm², 50 64 psi)
@2 000 r/min (rpm), oil temp. 90 °C (194 °F)
Stop the engine.
Remove the oil pressure gauge and adapter.
Take care against burns from hot engine oil that will
drain through the oil passage when the plug is re-
When installing the oil pressure switch, apply silicone
sealant to the threads of the switch, and tighten it to the
Torque - Oil Pressure Switch: 15 N·m (1.5 kgf·m, 11 ft·lb)
Apply grease to the oil pressure switch terminal screw.
Connect the oil pressure switch lead and slide back the
rubber boot to the original position.
ENGINE LUBRICATION SYSTEM 7-15