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1.5L REVOTORQ ENGINE
45
Connect compression tester to adapter and
tighten vent knob.
Crank the engine with starter motor by
200-
250
rpm approximately. Pressure gauge
needle will start rising. Continue cranking till
gauge needle stops rising any further. Note
down the reading. Loosen vent knob to make
sure the tester needle returns to zero.
Repeat this operation for remaining cylinders.
Minimum compression pressure in each
cylinder should be
22 ± 1
bar.
Low compression pressure may be due to
leakage past valves / piston rings / blown
cylinder head gasket. To ascertain the point
of leakage, spray small quantity of clean
engine oil in to cylinder showing low
pressure. If it improves, wear in piston rings /
cylinder bore is indicated. If it does not,
leakage past the valves is indicated. If
compression pressure of adjacent cylinder is
also on lower side and equal, it may be due
to blown cylinder head gasket.
d.
Fuel System
Check the Fuel system for fuel flow. If the
flow is restricted change the filter/ rectify the
defect.
e.
Clutch Slippage
Clutch slipping can be confirmed by any of
the following two methods:
Drive the vehicle with normal load in
3rd
gear
on level ground and let the speed drop
down to approximately
20 kmph
. Now press
accelerator pedal fully. With slipping clutch
the vehicle speed will not pick up and also
clutch burning smell will be noticed. If this
does not occur and vehicle picks up speed, it
indicates that clutch does not slip.
f.
Brake Binding
During driving apply brakes number of times
and then shift gear to neutral position and
check free rolling of vehicle. Check brake
drums/brake discs for overheating and if
necessary jack up the vehicle and check
wheels for free rotation.
g.
Turbocharger
Check for Tuning
1. Check intactness of actuator rod end.
2. Collapsed or restricted air pipe before turbo
3. Check for crank bent or actuator rod bend or
hose pinch.
4. Restricted or damaged cross over pipes
turbo to inlet manifold
5. Foreign object between air cleaner and turbo
6. Compressor./ Turbine Wheel damage due to
Foreign object entry
7. Turbine bolts, Compressor bolts, actuator
bracket bolts, or Clamps loose.
8. Check Air filter for any blockage
9. Check for excessive back pressure.
If not OK the turbo charger must be replaced.
Check Turbocharger compressor wheel
damage
1. Disconnect Compressor Air inlet pipe.
2. Inspect compressor wheel blade.
3. There should be no visible damage.
If damaged, the turbo charger must be
replaced
The entire air circuit must be cleaned or
changed to avoid new failure in case of
foreign object
The foreign object can be found in the heat
exchanger
Check Turbocharger rotor movement
1. Check rotor movement, it should spin freely.
2. There should be no trace of contact with
housing.
If not OK the turbo charger must be replaced
Check Turbocharger Turbine wheel damage
1. Disassemble Turbocharger or exhaust gas
connection.
2. Inspect turbine wheel rotor damage.
you need to look behind the blades,
damages are often located in tip area
If damaged, the turbo charger must be
replaced
The foreign object can be found in the
catalyst or in the particulate filter