1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Temp g/ml*
(state) Color Balls (o: floating, x: sinking)
°C °F 1 2 3 4 5
90 194 ? x x x O O
80 176 ? x x x/O O O
70 1.050 x x x/O O O
60 1.055 x x x/O O O
50 122 ? x x O O O
30 1.060 x x/O O O O
20 68 1.070 x x/O O O O
10 1.075 x x/O O O O
0 32 1.090 x/O O O O O
-4 25 1.100 O O O O O
-10 ? O O O O O
-20 -4 ? O O O O O
-30 -22 Viscous O O O O O
-37 -35 Highly viscous O O O O O
-40 -40 Slurry O O O O O
-50 -58 Sherbet O O O O O
*1) "Anticorrosion/Antifreeze" (50:50) (Mercedes-Benz Part #Q1-03-0002). Diluted with distilled water.
*2) Measured with accurate hydrometer.
*3) Standard plastic tool with five color-coded balls, indicating by numbers of floating balls [one +20 °C, two +5 °C, three -10 °C, four -25 ° C, five -40 ° C].
*4) The ball sinks partially and stays floating at the middle of tube.
(Summary)
1. The result shows that, in 50% M-B Coolant, three to four balls float at the room temperature and becomes slurry at -40 ° C/F. If the coolant concentration is adjusted at high temperature, more than four balls will float at the room temperature. At this concentration, the Coolant does not freeze at extreme low temperature but circulation may not be enough for cooling, and may cause early water pump breakdown due to high viscosity.
2. The result also shows that commercial Coolant Tester may not be accurate, and if coolant concentration is adjusted based on the indicated number of floating balls at the room temperature, the coolant may freeze at the temperature higher than the indicated value, causing damage to the radiator, thermostat, valves, and other components.
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