Threeway Catalyst Twc System

Carnegie Foundation Founder Working

Nj HjO

ICTWl

To reduce HC. CO and NOx omissions, they are oxidized, reduced and converted to nitrogen (Ni), carbon dioxide (CO*) and water (HJO) by tbe catalyst.

Exhaust port

IN.

TWC

Exhaust Gas

HC,CO, AND NOx

OXIDATION AND REDUCTION

COJ HÎO N?

N /

V

n t IC 7902

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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 protector is damaged or dented to the extent that it contacts the catalyst, repair or replace.

Heat Insulator

INSPECTION OF HEAT INSULATOR

1. CHECK HEAT INSULATOR FOR DAMAGE

2. CHECK FOR ADEQUATE CLEARANCE BETWEEN CATALYTIC CONVERTER AND HEAT INSULATOR

1996 Toyota Tacoma Catalytic Converter

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 converter.

(d) Remove the converter and gaskets.

2. INSTALL CONVERTER

(a) Pl8ce new gaskets on the converter front and rear pipes, and connect the converter to the exhaust pipes, lb) Tighten the bolts.

Torque: Catalyst — Exhaust pipe

(c) Reinstall the bracket bolts and tighten them.

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