Checking coolant leaks 1. After the coolant temperature drops below 38°C loosen the radiator cap. 2. Check that the coolant level reaches filler neck. 3. Install the radiator cap tester to the radiator filler neck and apply a pressure of 1.4kg/cm2 . While maintaining it for 2 minutes, check the radiator, hose, and connecting part for leak. Because the coolant in the radiator is too hot, never open the cap when it hot, or injury may occur due to an outburst of hot water. Dry out the inspection part. When removing the tester, take care not to spill the coolant. When removing/installing the tester as well as testing, take care not to deform the filler neck. 4. Replace parts if leak is detected.
Specific gravity test 1. Measure specific gravity of the coolant using a hydrometer. 2. After measuring the coolant temperature, calculate specific gravity using the following table. Relation between Coolant concentration and Specific Gravity G643(E) Service Manual Chapter 2.
Recommended Maintenance 22 CAUTION Temperature and Specific gravity of coolant (Temp.:℃) Freezing temp(℃) Coolant Concentration Specific Volume 10 20 30 40 50 1.054 1.050 1.046 1.042 1.036 -16 30% 1.063 1.058 1.054 1.049 1.044 -20 35% 1.071 1.067 1.062 1.057 1.052 -25 40% 1.079 1.074 1.069 1.064 1.058 -30 45% 1.087 1.082 1.076 1.070 1.064 -36 50% 1.095 1.090 1.084 1.077 1.070 -42 55% 1.103 1.098 1.092 1.084 1.076 -50 60%