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1.5L REVOTORQ BS VI ENGINE
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D. Oil Cooler
Oil cooler is heat exchanger which uses coolant to
reduce the temperature of oil coming from the oil
pump. It is mounted on the cylinder block with an
adapter.
E. Hydraulic Lash Adjuster (HLA)
Hydraulic Lash Adjuster supports the pivot end of
the rocker arm while automatically controlling the
rocker arm position to keep it in contact with the
camshafts and valve.
The range of the hydraulic lash adjuster accommo-
dates engine build tolerances; hence no adjustment
is required during engine assembly.
At all engine working conditions it maintains zero
clearance between rollers rockers and valve stem.
Maintenance
Hydraulic lash adjuster uses Engine oil pressure for
its operation. In case of a freshly assembled En-
gine, do not run for a long time; there are chances
of valve train noise appearing when the engine is
started.
HLA noise can be heard as repeated tappet like
noise when engine is running at low idle speed.
Following procedure is recommended to eliminate
the noise.
Raise the Engine speed to 1000rpm without load
(Vehicle stationary) to bleed the hydraulic
chamber of HLA. The noise should disappear
in15-30 seconds.
If the noise still persists, run the engine further
under same condition (no load at 1000 RPM) for
several minutes. The noise should disappear in
3 to 30 mins, in few cases.
In a very rare case if the noise is still heard, the
HLA is stuck in compressed position and has to
be replaced.
NOTE
There is no danger of damage to other components,
if engine is run for few minutes on no load condition
.
F. Piston Cooling Nozzle
Piston cooling nozzles are fitted on the block such
that the oil sprayed from it hits the underside of the
piston crown / gallery. This is very essential to bring
down the piston crown temperature.
G. Oil Pressure Switch
Oil pressure switch sends the signal to low oil pres-
sure indicator lamp provided on the vehicle
instrument panel by closing the circuit to ground
when the oil pressure is low / below the optimum
value.