Step 2 - Freeze Protection, Checking:
-- Use the pipette to apply a drop of coolant to the glass of the :T10007A . The cut-off line can now be clearly recognized through to the refractometer.
-- Use the corresponding scale to determine the coolant freeze protection. Read the value on the cut-off line to do so.
-- If the freeze protection value does not match the specification in the FLUID CAPACITY TABLES - MODEL YEAR: 2018FLUID CAPACITY TABLES - MODEL YEAR: 2016FLUID CAPACITY TABLES - MODEL YEAR: 2017 . , perform the following actions:
| Freeze Protection Value: | Evaluation / Action: |
|---|---|
| Greater than the specified value guideline | Depending on the variance, remove a small amount of coolant and replace with distilled water. Repeat the procedure until the correct coolant mixture is obtained. |
| Less than the specified value guideline | Depending on the deviation, remove a small amount of coolant and replace with coolant additive. Repeat the procedure until the correct coolant mixture is obtained. |
-- Check the concentration of the coolant additive again after the road test.
The :T10007A must be used to determine the actual freeze protection density.
The refractometer scale -1- applies to coolant additives G11, G12, G12+ and G12++.
The scale -2- only applies to coolant additive G13.
If more than one type of coolant additive has been used, use the scale for G13 to determine the frost protection.
The temperature on the :T10007A corresponds to the >>freezing point<<. At this temperature, the first flakes of ice begin to form in the coolant.
The coolant system should always be filled with freeze protection the entire year. A proper mixture ratio of coolant additive will prevent the build-up of calcium, freezing and corrosion damage and will also raise the boiling temperature.
In countries with tropical climates, the coolant improves the engine reliability due to the increased boiling point when the vehicle is driven under heavy load.