151 / 1236
ENGINE
119
C. OIL COOLER
01
Oil passage into Filter
02
Passage of filtered oil inout Block
Oil cooler is heat exchanger which uses coolant to
reduce the temperature of oil coming from the oil
pump. It is mounted on the oil filter bracket.
NOTE
For other details refer overhauling procedure for oil
pump in engine section.
D. 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 Engine,
do not run for a long time; there are chances of valve
train noise / tappet 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 500rpm without load
(Vehicle stationary)
to bleed the hydraulic cham-
ber of HLA. The noise should disappear in15-30
seconds.
•
If the noise still persists, run the engine further
under same condition
(no load at 500 RPM)
for