Subaru Forester Manuals 2023 Forester Owner's Manual | Page 397

Catalytic converter 391
. If at any time you suspect that exhaust fumes are entering the vehicle , have the problem checked and corrected as soon as possible . If you must drive under these conditions , drive only with all windows fully open .
. Keep the rear gate closed while driving to prevent exhaust gas from entering the vehicle .
8-4 . Catalytic converter
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backfiring or incomplete combustion ), 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 system .
. Do not drive with an extremely low fuel level .
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 exhaust system for a short time after the engine has been shut off . This sound is normal .
The catalytic converter is installed in the exhaust system . It serves as a catalyst to reduce HC , CO and NOx in exhaust gases , thus providing cleaner exhaust .
To avoid damage to the catalytic converter :
. Use only unleaded fuel . Even a small amount of leaded fuel will damage the catalytic converter .
. Never start the engine by pushing or pulling the vehicle .
. Avoid racing the engine .
. Never turn the ignition switch to the “ OFF ” position while the vehicle is moving .
. Keep your engine tuned-up . If you feel the engine running rough ( misfiring ,
WARNING
. Avoid fire hazards . Do not drive or park the vehicle anywhere near flammable materials ( e . g ., grass , paper , rags or leaves ), because the catalytic converter operates at very high temperatures .
. Keep everyone and flammable materials away from the exhaust pipe while the engine is running . The exhaust gas is very hot .
Driving tips