Mazda MX-6 1998, Workshop Manual

Page: 448 / 1282

COOLING SYSTEM
ENGINE COOLANT REPLACEMENT
1. Drain the coolant in the coolant reservoir.
2. Remove the radiator cap and the coolant filler cap
(KL) and loosen the radiator drain plug.
3. Drain the coolant into a container.
4. Flush the cooling system with water until all traces
of color are gone.
5. Leave the system until drain completely.
6. Tighten the radiator drain plug.
Caution
•
The engine has aluminum parts that can
be damaged by alcohol or methanol
antifreeze. Do not use alcohol or methanol
in the cooling system. Use only
ethylene-glycol-based coolant.
• Use only soft (demineralized) water in the
coolant mixture. Water that contains
minerals will cut down on the coolant’s
effectiveness.
7. Referring to the following graph and chart, select
proper gravity of the coolant. Slowly pour the
coolant into the radiator up to the coolant filler port
(FS) or into the engine up to the coolant filler port
(KL).
Filling pace
1.0 L {1.1 US qt, 0.9 Imp qt}/min. [max]
W6U112W03
SPECIFIC COOLANT PROTECTION
{14) {32) (50) (68) (86) (104) (122) (140) (158) ¡176) (194)
COOLANT TEMPERATURE °C {°F}
W6U112WA1
Antifreeze solution mixture percentage
Coolant protection
Volume
percentage
Gravity
at 20 ”C
{68 °F}
Water Coolant
A b o ve -1 6 °C {3 °F) 65 35 1.054
A b o ve - 2 6 °C {-1 5 °F} 55 45 1.066
Above -4 0 °C {-4 0 °F) 45 55 1.078
8. Fill the coolant into the reservoir up to the F mark
on the coolant reservoir.
9. Fully install the radiator cap and the coolant filler
cap (KL).
10. Start the engine and let it idle for approx. 10
minutes. If the coolant temperature becomes too
high, stop the engine to prevent it from
overheating.
11. After engine warms up, run it at approx. 2,500 rpm
for 5 minutes.
12. Increase the engine speed to approx. 3,000 rpm
for 5 seconds, then return to idle. Repeat several
times.
13. Stop the engine and wait until it is cool.
14. Inspect the coolant level. If it is low, repeat steps
7— 12.
15. Inspect for the coolant leakage.
0 1 -1 2 -2