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ENGINE
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3.1.8.1.4 MAINTENANCE
3.1.8.1.4.1 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, deteriora-
tion or out of position.
•
Keep sufficient clearance between exhaust sys-
tem component and underbody.
•
Check exhaust system for leakage, loose connec-
tion, 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 con-
nection 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. result-
ing into fire.
MAINTENANCE OF CLOSED COUPLED CATA-
LYTIC 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 addi-
tion 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 periodical-
ly 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
vehcle.
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. Investi-
gate 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 pres-
sure, low top speed, poor pick up, black smoke,
carbon build up and low mileage.
•
Check and ensure EGR Valve & control system is
clean and functioning properly.
•
Excessive carbon build-up / sticky valve.
•
Damaged vacuum lines.