Radiator Cap; Anti-Freeze Solution Mixture Percentage; Radiator Cap Valve; Negative Pressure Valve - Mazda 626 1989 Workshop Manual

3

RADIATOR CAP

3. Set the heater control switch to the maximum hi
position.
4. Flush the cooling system with water until all trac
of color are gone, then let the system drain co
pietely.
5. Fill with the proper mixture and amount of
lene glycol-based coolant.
Caution
a) Do not use alcohol- or methanol-bas<
coolant.
b)Use only soft (demineralized) water in tl
coolant mixture.
86U03X'028

Anti-freeze solution mixture percentage

Protection
Above - 1 6 ° C (3°F)
Above - 2 6 °C (-1 5 °F )
Above - 4 0 °C (-4 0 °F)
6. Run the engine at idle with the radiator cap
moved. Let any air bleed from the system, and ad>
more coolant.
7. Install the radiator cap, and inspect all connection
for leakage.
RADIATOR CAP

INSPECTION

Radiator Cap Valve

1. Remove foreign material (such as water residue
from between the radiator cap valve and the valve
,seat.
2. Attach the radiator cap to a tester with the SST
Apply pressure gradually to 74—103 kPa
(0.75—1.05 kg/cm2, 11—15 psi).
3. Wait about 10 seconds; then check that the pres­
sure has not decreased.

Negative Pressure Valve

1. Pull the negative-pressure valve to open it. Check
that it closes completely when released.
2. Check for damage on the contact surfaces, and;
for cracked or deformed seal packing.
3. Replace the radiator cap if necessary.
Volume percentage
Gravity at
Solution 20°C (68°F
Water
35
65
1.054
45 '
55 1.066
55 45
1.078
e \ \
n
i
j
i j