Toyota Supra 1990 Manual page 173

EMISSION CONTROL SYSTEMS -
Three-Way Catalyst (TWC) System
EC-21
EC2902
Heat I nsu lator
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EC2903
EC0244
INSPECTION OF EXHAUST PIPE ASSEMBLY
1. CHECK CONNECTIONS FOR LOOSENESS OR DAMAGE
2. CHECK CLAMPS FOR WEAKNESS. CRACKS OR DAMAGE
INSPECTION OF CATALYTIC CONVERTER
CHECK FOR DENTS OR DAMAGE
If any part of the protector is damaged or dented to the
extent that it touches the catalyst. repair or replace it.
INSPECTION OF HEAT INSULATOR
1. CHECK HEAT INSULATOR FOR DAMAGE
2. CHECK FOR ADEQUATE CLEARANCE BETWEEN CATA-
LYTIC CONVERTER AND HEAT INSULATOR
REPLACEMENT OF CATALYTIC CONVERTER
1. REMOVE CONVERTER
(a) Jack up the vehicle.
(b) Check that the converter is cool.
(c) Remove the bolts at the front and rear of the con-
verter.
(d) Remove the converter and gaskets.
2. INSTALL CONVERTER
(a) Place new gaskets on the converter front and rear
pipes. and connect the converter to the exhaust pipes.
(b) Tighten the bolts.
Torque: Catalyst-Exhaust pipe
440 kg-em (32 ft-Ib. 43
Nom)