Freeze Protection, Checking And Adding Coolant Additive
Special tools and workshop equipment required
- Refractometer T10007
Read the bright/ark boundary to obtain an accurate reading for the following tests. Place a drop of water on the glass to improve the readability of the bright/dark boundary. The bright/dark boundary can be clearly recognized on the "WATERLINE".
-- Check the concentration of the coolant additive using Refractometer T10007 (operating instructions).
The scale -1- of the Refractometer is designed for coolant additives -G 12- and -G 11-.
The freeze protection must be ensured down to approximately -25°C (-13°F).
If climate conditions make greater freeze protection necessary, the amount of G 12 Plus or G 12 Plus can be increased up to 60% (Freeze protection to approximately --40°F [-40°C])). Adding more coolant reduces the freeze protection and reduces the cooling efficiency.
-- Drain some of the coolant and add coolant additive if the freeze protection G 12 Plus if the frost protection is inadequate. Refer to COOLANT LEVEL, CHECKING AND FILLING .
Follow all waste disposal regulations!
Use only distilled water for mixing. Tap water and well water do not have the necessary quality to assure the functionality of the coolant.
-- Check the freeze protection after the road test.