Datsun C210 series - Page 26

Condition
NOISY ENGINE
Car
knocking
Mechanical
knocking
Crankshaft
bearing
knocking
Connecting
rod
bearing knocking
Piston and
cylinder
noise
Piston
pin
noise
Water
pump
noise
Air
pump
noise
Others
Engine
Tune
up
Probable cause
Overloaded
engine
Carbon
knocking
Timing
knocking
Fuel
knocking
Preignition misusing
of
spark plug
This
strong
dull noise increases
when
engine
is accelerated To
locate the
place
cause
ii
misfrre
on
each
cylinder
If the noise
stops
by
the misfrre this
cylinder
generates
the
noise
This is a little
higher
pitched
noise than the
crankshaft
knocking
and also
increases
when
engine
is accelerated Cause
a
misfire
on each
cylinder
and if
the
noise diminishes
almost
completely
this crankshaft
bearing
generates
the
noise
When
you
hear an
overlapping
metallic noise
which increases its
magnitude
with the
rev
olution of
engine
and jVhich decreases as
engine
is warmed
Up
this noise is
caused
by
piston
and
cylinder
To locate the
place
cause a misfrre on each
cylinder
This noise
is
heard at
each
highest
and
lowest
dead end of
piston
To locate the
place
cause a
misfrre on each
cylinder
Tlus
noise
may
be caused
by
w9rn
or
damaged bearings
or
by
the uneven surface
of
sliding paris
Damaged
air
pump
An
improper
adjustment
of valve clearance
Noise of
timing
chain
An
excessive end
play on
crankshaft
Noisy
E F E
valve shaft
Wear
on
clutch
pilot bushing
Note This noise will be heard when clutch
is
disengaged
ET
16
Corrective action
Use
right
gear
in
driving
Disassemble
cylinder
head and remove
carbon
Adjust ignition timing
Use
specified
octane fuel
Use
specified spark plug
This
is caused
by
worn
or
damaged bearings
or
unevenly
worn
crankshaft
Renew bear
ings
and
adjust
or
change
crankshaft
Check lubrication
system
Same as the case of crankshaft
bearing
This
may
cause an abnormal
wearing
of
cylinder
and lower
compression
which in
turn
will
cause a
lower out
put power
and
excessive
consumption
of oil
Overhaul
engine
This
may
cause
wear on
piston pin
or
piston
pin
hole
Renew
piston
and
piston
pin
assembly
Replace
water
pump
with a new o ne
Repair
or
replace
Adjust
Adjust
the tension of chain
Disassemble
engine
and renew
main
bearing
Repair
Renew
bush
and
adjust
drive shaft