Mariner 4WD L4-2.5L (2010)
Catalytic Converter: Service and Repair
Catalytic Converter - Manifold
Catalytic Converter - 2.5L Manifold, Hybrid
Removal
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Vehicle Jacking and Lifting.
2. Remove the exhaust intermediate pipe. For additional information, refer to Exhaust Intermediate Pipe - 2.5L, Hybrid See: Exhaust Pipe/Service
and Repair/Exhaust Intermediate Pipe.
3. Remove the 2 exhaust bracket bolts.
4. Disconnect the Heated Oxygen Sensor (HO2S) and the Catalyst Monitor Sensor (CMS) electrical connectors.
5. Remove and discard the 7 catalytic converter manifold nuts.
6. Remove the catalytic converter manifold from the vehicle.
-
Discard the catalytic converter manifold gasket.
7. Remove and discard the 7 catalytic converter manifold studs.
8. Clean and inspect the catalytic converter manifold. For additional information, refer to Engine.
Installation
1. Install the 7 new catalytic converter manifold studs.
-
Tighten to 17 Nm (150 lb-in).
2. NOTICE: Failure to tighten the catalytic converter manifold nuts to specification before installing the converter bracket bolts will cause
the converter to develop an exhaust leak.
NOTICE: Failure to tighten the catalytic converter manifold nuts to specification a second time will cause the converter to develop an
exhaust leak.
Using a new gasket, install the catalytic converter and the 7 exhaust manifold nuts. Tighten in 2 stages in the sequence shown.
-
Stage 1: Tighten to 47 Nm (35 lb-ft).
-
Stage 2: Tighten to 47 Nm (35 lb-ft).
3. Connect the HO2S and the CMS electrical connectors.
4. Install the 2 exhaust bracket bolts.
-
Tighten to 25 Nm (18 lb-ft).
5. Install the exhaust intermediate pipe. For additional information, refer to Exhaust Intermediate Pipe - 2.5L, Hybrid See: Exhaust Pipe/Service and
Repair/Exhaust Intermediate Pipe.
