BMW 528I User Manual download pdf (Page 126)

126n

Catalytic converter

The catalytic converter reduces harmful

exhaust emissions, and is designed for

use with unleaded fuel only.

Even minute quantities of lead would be

enough to permanently damage both

the catalytic converter and the system

oxygen sensor.

To ensure efficient, trouble-free engine

operation and avoid potential damage:

> Be sure to comply with the scheduled

maintenance requirements

> Fill the fuel tank well before it is

empty

> Tow-start the vehicle only when the

engine is cold, since unburned fuel

may otherwise reach the catalytic

converter. It is better to start the vehi-

cle with an outside starting aid

> Avoid other situations in which the

fuel is not burned, or burns incom-

pletely, such as engaging the starter

frequently or for extended periods, or

repeated start attempts in which the

engine does not start (stopping and

restarting an engine which is running

properly does not present a problem).

Never let the engine run with any of

the spark plug cables disconnected.

Be sure to comply with the in-

structions above to prevent un-

burned fuel from reaching the catalytic

converter. Otherwise there is danger of

overheating and damage to the cata-

lytic converter.

Extreme temperatures occur at the cat-

alytic converter on this and every cata-

lyst-equipped vehicle. Heat shields are

installed adjacent to some sections of

the exhaust system. Never remove

these shields; do not apply undercoat-

ing to their surfaces. When driving,

standing at idle, and parking the vehi-

cle, take care to avoid contact between

the exhaust system and flammable ma-

terials (grass, hay, leaves, etc.). Such

contact could lead to a fire, resulting in

personal injury and property damage.<

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