Datsun 1000 - Page 27

i
Faulty
coil or
capacitor
0
Burned
or cracked
distributor
rotor
k Excessive wear in distributor shaft or
earn
I
Incorrect
valve
timing
m
Burned
warped
or
pitted
valves
n
Blown
cylinder
head
gasket
0 loss
of
compression
So
Noisy
valve
operation
Possible
cause
a
Incorrectly adjusted
clearance
b
Weak
or broken
valve
springs
c Worn valve
guides
9
Big
end
bearing
noise
Possible
cause
a Lack
of
adequate
oil
supply
b
Excessive
bearing
clearance
c
Thin
oil or crankcase
dilution
d Low oil
pressure
e
Misaligned
big
end
bearings
10
Apparent
main
bearing
noise
Possible
cause
a Loose
flywheel
b Loose
crankshaft
pulley
c Low
oil
pressure
d
Excessive crankshaft end
play
e
Crankshaft
journals
ou
t
of round and excessive
bearing
to
journal
clearance
f Insufficient
oil
supplv
II
Excessive oil
consumption
Possible
cause
a
Oil
leaks
b
Damaged
or worn valve
stem
oil
seals
c
Excessive clearance
valve
stem to valve
guide
d
Worn
or broken
rings
e
Rings
too
tight
or
stuck
in
groves
t
Excessive wear in
cylinders
pistons
and
rings
g Compression
rings incorrectly
installed oil
rings
c1og
ged or
hroken
12
Drop
in oil
pressure
Possible
cause
a Oil
level low in
sump
b
Thin
or
diluted
oil
c
Oil
pump
relief
valve stuck or
spring
broken
d
Excessive
bearing
clearance
e Excessive
wear
of oil
pump
components
i
Air leak in
oiling
system
Engine
21
Renew
faulty
component
Renew
faulty
component
Renew
faulty
components
Check
and reset
as
necessary
Carry
out
top
overhaul on
engine
Renew
gasket
Cnrrv
out
compression
test and rectify
Remedy
Check and
adjust
to
specifications
Check and renew
faulty components
Renew or
reallJ
and fit
oversize valve
Remedy
Check
oil level
in
sump
condition of oil
pump
and
relief
valve
Renew oil
fiI teT
element
Renew
bearing
shells
check and
regrind journals
if
oval
Change
to correct oil
grade
Check
operating
conditions and
cooling system
thermostat
Check
pressure
relief
valve and
spring
oil filter
by pass
valve
Align connecting
rods and renew
bearings
if
necessary
Remedy
Tighten securing
bolts to
specified
torque
Renew
or
tighten pulley
Check
bearing
to
journal
clearance check condition of
oil
pump
and
pressure
relief
valve
Recondition
as
necessary
Renew centre main
bearing
thrust
washers
Regrind journals
and fit undersize
bearings
Replenish
oil in
sump
to correct
level
Remedy
Check and
renew
gaskets
as
necessaI
Renew
damaged
or worn
components
Renew valve
guides
bushes
and valves or ream and fit
oversize valves
Renew
rings
Renew
rings
and clean ou t
ring
grooves
Recondition
cylinders
and renew
pistons
and
rings
Renew
rings
Remedy
Check and
replenish
to full mark
Change
to correct oil
grade
and
rectify source of
dilution
Free valve or
renew broken
spring
Renew
bearing
shells
or
recondition
journals
as
necessary
Renew or
recondition oil
pump
Rectify
as
necessary
27
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