MX-5 Miata LS L4-1.8L DOHC (2001)
Power Steering Pump: Testing and Inspection
Fluid Pressure Inspection
1. Assemble the SSTs as shown in the figure.
Tightening torque 40 - 49 Nm (4.0 - 5.0 kgf-m, 29 - 36 ft. lbs.)
2. Mark both hose connections to ensure that the hose is reinstalled in its original position.
3. Disconnect the pressure pipe from the oil pump, and connect the SSTs.
4. Bleed the air from the system.
5. Open the gauge valve fully. Start the engine and turn the steering wheel fully left and right to raise the fluid temperature to 50 - 60°C (122 - 140°
F).
6. Close the gauge valve completely. Increase the engine speed to 1,000 - 1,500 rpm and measure the fluid pressure generated by the oil pump. If the
pressure is not within specification, replace the oil pump component.
Caution: If the valve is left closed for more than 5 seconds, the fluid temperature will rise excessively and adversely affect the oil pump.
Oil pump fluid pressure 7,846 - 8,335 kPa (80 - 85 kgf/cm2, 1,138 - 1,208 psi)
7. Open the gauge valve fully and increase the engine speed to 1,000 - 1,500 rpm.
8. Turn the steering wheel fully to the left and right, then measure the fluid pressure generated at the gear housing. If the pressure is not within
specification, repair or replace the gear housing component.
Caution: If the steering wheel is kept in the fully turned position for more than 5 seconds, the fluid temperature will rise excessively and
adversely affect the oil pump.
