Supra Sport Roof L6-2997cc 3.0L DOHC MFI (1998)
Catalytic Converter: Service and Repair
REPLACEMENT
1. REMOVE AIR CLEANER DUCT
2. REMOVE AIR CLEANER, MAF METER AND INTAKE AIR CONNECTOR PIPE ASSEMBLY
3. DISCONNECT HEATED OXYGEN SENSORS FROM EXHAUST MANIFOLD
(a) Disconnect the 3 oxygen sensor connectors and clamps.
(b) Disconnect the 2 oxygen sensors from the exhaust manifold.
4. DISCONNECT FRONT EXHAUST PIPE FROM EXHAUST MANIFOLD
5. REMOVE EXHAUST MANIFOLD (WITH TWC)
(a) Using a 14 mm deep socket wrench, remove the 8 nuts, exhaust manifold and 2 gaskets.
(b) Remove the heated oxygen sensor (bank 2 sensor 1) from the exhaust manifold.
6. RECONNECT HEATED OXYGEN SENSORS TO EXHAUST MANIFOLD
(a) Install the 3 oxygen sensors to the exhaust manifold.
Torque: 44 N.m (450 kgf.cm 33 ft.lbf)
7. REINSTALL EXHAUST MANIFOLD (WITH TWC)
(a) Install the 2 new gaskets to the cylinder head.
(b) Using a 14 mm deep socket wrench, install the exhaust manifold with the 8 nuts. Uniformly tighten the nuts in several passes.
Torque: 40 N.m (400 kgf.cm, 30 ft.lbf)
8. RECONNECT 3 HEATED OXYGEN SENSOR CONNECTORS AND CLAMPS
9. RECONNECT FRONT EXHAUST PIPE TO EXHAUST MANIFOLD
10. REINSTALL AIR CLEANER, MAF MATER AND INTAKE AIR CONNECTOR PIPE ASSEMBLY
11. REINSTALL AIR CLEANER DUCT
