Coolant Protection; Antifreeze Solution Mixture Percentage - Mazda MX-5 1990 Workshop Manual

ENGINE COOLANT
E
SPECIFIC
GRAVITY
1.10 0
1.09
0 ,
1.08
1.07
1.06
0
o~
0 ............
1.05 0
1.04 0
1.03
0
1.02 0
1.01
v
1.00 0
"
COOLANT PROTECTION
"' "
~
'"
......
~%
......
40%~
~
~: ~
.......
~
............
........
............
...........
~
t--....
.............
.........
~
...........
I'-..
-
............
--
-10 0 10 20 30 40 50 60 70 80 90
(14) (32) (50) (68) (86)(104)(122)(140)(158)(176)(194)
COOLANT TEMPERATURE
°c
(OF)
05UOEX-009
Coolant Protection
Caution
• Do not use alcohol- or methanol-based coolant.
• Use only soft (demineralized) water in the coolant
mixture.
1. Measure the coolant temperature and specific gravity with
a thermometer and a hydrometer.
2. Determine the coolant protection by referring to the graph
shown .
If the coolant protection is not proper, add water or coolant.
Antifreeze solution mixture percentage
Coolant protection
Volume percentage
Gravity at
Water Coolant
20°C (68°F)
Above -16°C (3°F) 65 35 1.054
Above
-26°C (-15°F) 55 45
1.066
Above -40°C (-40°F) 45 55 1.078
05UOEX-010
REPLACEMENT
Warning
• Never open the radiator cap while the engine is hot.
• Wrap a thick cloth around the cap when loosening.
• Use caution when draining hot coolant.
Caution
• Do not use alcohol- or methanol-based coolant.
• Use only soft (demineralized) water in the coolant
mixture.
1. Remove the radiator cap and loosen the drain plug.
2. Drain the coolant into a suitable container.
3. Flush the cooling system with water until all traces of color
are gone, then let the system drain completely.
4. Install the drain plug.
5. Fill with the proper amount and mixture of ethylene glycol-
based coolant by referring to the table above.
Coolant capacity: 6.0 liters (6.3 US qt, 5.3 Imp qt)
6. Run the engine, with the radiator cap removed, until the up-
per radiator hose is hot.
7. With the engine idling, add coolant to the radiator until it
reaches the bottom of the filler neck.
8. Install the radiator cap.
E-5