Catalytic Converter - Subaru Impreza 2016 Manual

exhaust fumes are entering the
vehicle, have t he probl em
checked and corrected as soon
as possible. If you must drive
under these conditions, drive
only with all windows fully open.
. Keep the trunk lid (4-door) or rear
gate (5-door) closed while driving
to prevent exhaust gas from
entering the vehicle.
NOTE
Due to the expansion and contraction
of the metals used in the manufacture
of the exhaust system, you may hear a
crackling sound coming from the ex-
haust system for a short time after the
engine has been shut off. This sound is
normal.

Catalytic converter

Petrol engine models
Diesel engine models
1) Catalytic converter
2) Diesel particulate filter
Driving tips/Catalytic converter
The catalytic converter is installed in the
exhaust system. It serves as catalyst to
reduce HC, CO and NOx in exhaust
gases, thus providing cleaner exhaust.
To avoid damage to the catalytic conver-
ter:
. For petrol engine models, use only
unleaded petrol. Even a small amount of
leaded fuel will damage the catalytic
converter.
. For diesel engine models, use only
diesel fuel that conforms to the specifica-
tion of EN590 or an equivalent.
. Never start the engine by pushing or
pulling the vehicle.
. Avoid racing the engine.
. Never turn off the ignition switch while
the vehicle is moving.
. Keep your engine tuned-up. If you feel
the engine running rough (misfiring, back-
firing or incomplete combustion), we re-
commend that you have your vehicle
checked and repaired by an authorized
SUBARU dealer.
. Do not apply undercoating or rust
prevention treatment to the heat shield of
catalytic converter and the exhaust sys-
tem.
. Do not drive with an extremely low fuel
level.
– CONTINUED –
8-3