Mazda 121 - Inspection of Cooling System; Coolant Level (Engine Cold); Coolant Quality; Coolant Leakage

SCHEDULED
MAINTENANCE
SERVICES
INSPECTION
OF
COOLING
SYSTEiI
Warning
.
Nevei
remove
the
radialor cap
while the engine
is
hot.
.
Wrao
a thick cloth
around
lhe cap
when
removing
it.
.
Whdn
removing
the
radiator
cap,
loosen
it slowly
to the
fitst stop
until
the
pressure in the
radialor
is
released.
and
then
remove
it.
Coolant
Level
(Engine cold)
1. Verifv
that the
coolanl
level
is near
the ladiator
f
llel
neck
2. Verilv that
lhe coolant
level in
the coolant
reservior is
be'
tween
the
FULL and
LOW
marks
3. Add coolant
if necessary.
Coolant Ouallty
1. Verffy that
theie
is no buildup
of rust
or scale
around
the
radiator cao
or radiator
filler neck
2.
Verily that coolant
is free of
oi!
Replace
the coolant
if
necessarv,
Coolant
Leakage
1.
Connect
a
radiator
tester
(commercially
available)
and the
SST
to the
radiator
filler neck.
2.
Apply t03
kPa
(1.05
kg/cmz.
15
psi)
pressure
to the
system.
3. Verify
that the
pressure is held.
It not, check
ior coolani
leakage
Coolanl
Protection
Caution
.
Do
not use
alcohol-
or methanol-based
coolant'
.
Use only
soft
(deminerallzed)
water
in
the coolant
mixlure.
1.
Measure the
coolant
temperature
and
specific
gravity
with
a
thermometer
and
a hydrometer'
2. Determine
the
coolant
protection
by
referring
to the
graph
lrthe coolant
protectaon
is
not
proper' add
water orcoolant
Antitreeze solution
mixture
percentage
?_--
-z'-
.- l,'1,/
'
COOLANT
IEMPEFATUFE
'C
(.F)
Gravily
ai
20"c
(68"F)
coolant
Above
-16"C
(3oF) 65
35
1.054
Above
26oC
(-1soF) 55
Above
-a0'C
(-40"D
55
1.078
A-8