Procedure
1. Use a hydrometer to measure the specific gravity of the coolant.
2. Measure the coolant temperature and, depending on the temperature, calculate the concentration of antifreeze in the coolant.
Example
Safe operating temperature is -15°C at a weighted specific gravity of 1.058 and a coolant temperature of 20°C.
- If the coolant concentration is below 30%, the anti-corrosion properties of the coolant are reduced.
- At a concentration of more than 60%, the frost resistance of the coolant deteriorates. For these reasons, make sure that the antifreeze concentration in the coolant is within the exact acceptable limits.
- Do not use coolant together with another brand of antifreeze.
Recommended coolant
Antifreeze | Antifreeze content in coolant |
| Based on ethylene glycol for working with aluminum parts | 50% (Except tropical areas) 40% (For tropical areas) |
The original source of the article is the website: HyundaiBook
The relationship between the concentration of antifreeze in the coolant and the specific gravity
Coolant temperature°C and specific gravity | Freezing point°C | Safe operating temperature°C | Coolant concentration | ||||
10 | 20 | 30 | 40 | 50 | |||
1,054 | 1,05 | 1,046 | 1,042 | 1,036 | –16 | –11 | 30% |
1,063 | 1,058 | 1,054 | 1,042 | 1,044 | –20 | –15 | 35% |
1,071 | 1,067 | 1,062 | 1,042 | 1,052 | –25 | –20 | 40% |
1,079 | 1,074 | 1,069 | 1,042 | 1,058 | –30 | –25 | 45% |
1,087 | 1,082 | 1,076 | 1,042 | 1,064 | –36 | –31 | 50% |
1,095 | 1,09 | 1,084 | 1,042 | 10,7 | –42 | –37 | 55% |
1,103 | 1,098 | 1,092 | 1,042 | 1,076 | –50 | –45 | 60% |