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Exhaust System Check - Parked (Saturn)

  1. Remove oxygen sensor.
  2. Insert Exhaust Back Pressure Adapter (SA9306E) into exhaust manifold. The thread designation is M18 x 1.50.
  3. Connect Gauge Bar Set (SA9127E), 0-60 in. H2O (0-15 kPa) gauge to back pressure adapter.
  4. With engine at normal operating temperature, observe exhaust back pressure at 4000 RPM.
  5. The exhaust back pressure must be less than 20.13 in. H2O (5.0 kPa).