Description

DESCRIPTION

The exhaust gasses flow into two double manifolds (one for each head) and then through two exhaust pipes to the the three way catalytic converter where most of the pollutants are removed.

A flexible element is located on the forward section of the exhaust pipe and serves to limit the transmission of vibration.

An intake for the measurement of the exhaust gasses is also present in the forward section of the exhaust pipe upstream of the lambda probe.

The Lambda probe is located at the entrance to the catalytic converter This device informs the Motronic control unit of the amount of oxygen present in the exhaust gases enabling the injection times to be adjusted to keep the stoichiometric ratio (air-fuel) at an optimum level.

The exhaust gasses exit the catalytic converter and pass on to the three silencers.

Heat dissipation to the car body, very high due to the catalytic converter, is limited by a system of thermal insulation.

For information regarding the individual components of the system, refer to the paragraphs below.

CAUTION: During engine operation all the exhaust pipes, and in particular the catalytic converter, heat up considerably. Before attempting any work the system should be left to cool with the engine switched off. DO NOT TOUCH THE CATALYTIC CONVERTER WITHOUT ADEQUATE PROTECTION SUCH AS GLOVES ETC. DO NOT ALLOW EASILY INFLAMMABLE MATERIAL TO COME IN CONTACT WITH THE CATALYTIC CONVERTER.

EXHAUST SYSTEM - FORWARD SECTION

From the two exhaust manifolds, two pipes collect the exhaust gasses and pass them to the catalytic converter. The connection to the manifolds and to the catalytic converter is accomplished by a flange and gaskets. The stretch of pipe beneath the engine is shielded by a layer of isolation enclosed by a metal covering which is integral with the pipe.

REMOVAL/REFITTING

1. Place the vehicle on a lift and raise it.