Checking should include
- performing a visual examination of the coolant, looking for solid particles (i.e., contaminants)
- submitting a coolant sample to a lab for analysis
- using a hydrometer or refractometer to measure the freeze protection of the coolant.
ASE 1: I. Diesel Engines: E. Cooling Systems (P-1)
Process/Skill Questions:
- What is the purpose of the various additives found in antifreeze?
- What is the difference between standard antifreeze and extended-life antifreeze?
- What temperature will cause a 50/50 mixture of water and antifreeze to freeze?