Coolant: Service and Repair
Antifreeze Hydrometer, Checking
Calibration of hydrometer must be checked frequently to ensure accuracy.
- mix a 50/50 mixture of antifreeze and water together in a small container
- hydrometer should read -35° C (-30° F)
- if not, put a mark (paint dot) to indicate where -35° C (-30° F) should be.