Datsun 1980 200SX Service Manual page 87

Special
Service Tool ENGINE LUBRICATION
COOLING SYSTEMS
Condition
Poor circulation
Corrosion
Overheating
Overcooling
Noise
Tool number
Kent Moore
No
STl9320oo0
125664
LC l0
Probable
cause
Restriction in
system
Insufficient coolant
Inoperative
water
pump
Loose fan belt
Inoperative thennostat
Excessive impurity
in water
Infrequent flushing and
draining
of system
Malfunctioning
thennostat radiator cap and
fan
coupling
Radiator fm choked with
mud chaff
etc
Incorrect
ignition and valve timing
Dirty
oil and
sludge in
engine
Inoperative water
pump
Loose fan belt
Restricted radiator
Inaccurate
temperature
gauge
Impurity
in water
Malfunctioning
thennostat
Inaccurate
temperature
gauge
Squeak at water
pump mechanical seal
Damaged
or worn
water
pump
bearing
C
arrective action
Check hoses for crimps and clear the
system
of
rust
and
sludge by flushing
radiator
Replenish
Replace
Adjust
Replace
Use soft clean
water
rain water is satis
factory
Cooling
system should be drained and flush
ed
thoroughly
at
least
twice
a
year
Perma
nent
antifreeze Ethylene glycol
base
can
be used
throughout
the
seasons
of
a
year
Replace
Clean
out air passage
thoroughly
by using
air
pressure from
engine
side of radiator
Adjust
Refill
Replace
Adjust
Flush radiator
Replace
Use soft clean
water
Replace
Replace
Use suitable
water
pump seal lubricant
or
replace
as
pump
assembly
Replace
as
pump
aSsembly
SPECIAL SERVICE TOOL
Tool name
Oil filter wrench
00