Description

DESCRIPTION

The exhaust gasses flow into two triple 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.

The Lambda probe is located on the forward section of the exhaust pipes and this device informs the Motronic control unit of the amount of oxygen present in the exhaust gasses 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, FORWARD SECTION

From the two exhaust manifolds, one for each cylinder head, two pipes collect the exhaust gasses and pass them to the catalytic converter.

The connection to the right-hand manifold and to the catalytic converter is accomplished by a flange and gaskets while the left-hand manifold employs a flange with a spherical collar.

To compensate for the heat deformation and vibration transmitted by the engine, bellows type flexible stretches are inserted along the forward section.

At the centre, the two pipes are connected by a covering at the centre of which is the seating for the Lambda probe.

REMOVAL/REFITTING

1. Place the vehicle on a lift.