Turbocharger: Testing and Inspection
TurbochargerINSPECTION
WASTE GATE ACTUATOR
- Except for WRX-SS model
1. Remove the intercooler.
2. Remove the turbocharger upper cover.
3. Remove the boost hose (B) from the waste gate actuator (A) of the turbocharger, and connect the Mighty Vac to the waste gate actuator (A).
4. Pressurize slowly with the Mighty Vac, and measure the pressure when the control rod stroke (D) becomes 1 mm (0.04 in). If it is not within the standard, replace the turbocharger assembly.
CAUTION: Do not pressurize over 56.0 kPa (0.57 kgf/sq.cm, 8.12 psi) to prevent damaging the waste gate actuator.
Operating pressure
(Control rod stroke 1 mm (0.04 in)):
Standard 44.0 - 46.6 kPa
(0.45 - 0.48 kgf/sq.cm, 6.38 - 6.76 psi)
5. After inspection, install the related parts in the reverse order of removal.
- WRX-SS model
1. Remove the intercooler.
2. Remove the turbocharger upper cover.
3. Remove the boost hose (B) from the waste gate actuator (A) of the turbocharger, and connect the Mighty Vac to the waste gate actuator (A).
4. Pressurize slowly with the Mighty Vac, and measure the pressure when the control rod stroke (D) becomes 2 mm (0.08 in). If it is not within the standard, replace the turbocharger assembly.
CAUTION: Do not pressurize over 89.9 kPa (0.92 kgf/sq.cm, 13.0 psi) to prevent damaging the waste gate actuator.
Operating pressure
(Control rod stroke 2 mm (0.08 in)):
Standard 74.7 - 80.8 kPa
(0.76 - 0.82 kgf/sq.cm, 10.8 - 11.7 psi)
5. After inspection, install the related parts in the reverse order of removal.
OIL PIPE AND WATER PIPE
- Check that there are no oil leakage or water leakage from the pipe attachment section.
- Check for cracks or loose connections.