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ENGINE
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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 :
Parking 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.
Check if there is Excessive carbon build-up/
sticky valve.
Check and ensure EGR Valve & control
system is clean and functioning properly.
Damaged vacuum lines.
The Catalytic converter should not be dropped
from a height. If dropped, it should not be
used.
All these can keep the ‘EGR’ open when not
desired and vice versa. Either way these can
seriously affect power output of the engine and
also the emission levels.