100 / 924
1.2L REVOTRON ENGINE
89
F. EXHAUST SYSTEM REMOVAL
MAINTENANCE
PRECAUTIONS
WARNING
To avoid the danger of being burned, do not
touch exhaust system when the system is
hot. Any service on the exhaust system
should be performed when the system is
cool.
At every interval of periodic maintenance service
and when vehicle is raised for other service, check
exhaust system as follows:
Check rubber mountings for damage,
deterioration or out of position.
Keep sufficient clearance between exhaust
system component and underbody.
Check exhaust system for leakage, loose
connection, dent & damage. If bolts or nuts are
loosened, tighten them to the specified torque.
Check nearby body areas for damage, missing
or mis-positioned part, open seam, hole, loose
connection or any other defect which could
permit exhaust fumes to seep into vehicle.
PRECAUTIONS FOR CATALYTIC CONVERTER
In the event of following symptoms, drive the
vehicle at slow speed without rapid acceleration.
Engine misfires or runs irregularly, following a
cold start.
A significant loss of power is noticed.
In case MIL lamp remains ON even after engine
has been started.
If the vehicle continuously runs with misfiring, it
may cause overheating of shell, carpet etc.
resulting into fire.
MAINTENANCE OF CLOSED COUPLED
CATALYTIC CONVERTER
Closed Coupled Catalytic Converter should be
flushed by giving full throttle
(4 to 5 times)
in
standing condition of vehicle on daily basis. In
addition to this it is recommended to run the vehicle
at high speeds
(80 to 100 kmph)
for few km as this
will help to flush the carbon soot deposits from
exhaust system and closed coupled catalytic
converter. High speed running of the vehicle may
be done periodically to avoid chocking of Closed
Coupled Catalytic Converter.
Alternative method for flushing operation for
cleaning the catalytic converter is by directing dry
compressed air draft (3 to 4 bar) in the direction of
catalytic converter inlet, after removing it from the
vehicle.
AVOID
Push start or tow-starting the vehicle.
(Use jump
leads).
Long
(not more than 10 seconds)
repeat
(not
more than 3 times)
starting of the vehicle.
Investigate the cause for difficulty in starting
and rectify the same.
Long idling
(to warm-up)
if the engine is running
rough, after a cold start.
Switching “OFF” the ignition when driving down
the hill.
Fuel almost empty.
Pre- Coating/Painting of Catalytic Converter
WARNING
Avoid parking of vehicle over inflammable
materials, such as dry leaves; grass etc. as
exhaust system is hot enough to initiate fire.
CAUTION
Ensure exhaust system and catalytic
converter is not blocked and is free from
obstruction.
Blockages in the exhaust can create back
pressure, low top speed, poor pick up, black
smoke, carbon build up and low mileage.
Excessive carbon build-up / sticky valve.
Damaged vacuum lines.
The Catalytic converter should not be dropped
from a height. If dropped, it should not be used.
CAUTION
The Catalytic converter should not be
dropped from a height. If dropped, it should
not be used.
EXHAUST ASSY. REAR (MAIN SILENCER)