Engine Performance
Work Example 4

WorkKey Level: 4
NATEF Automotive Tasks: VIII.F

According to the following chart, if you had a 25-quart system that contained 15 quarts of antifreeze and 10 quarts water what would the boiling point of the system be?

Freeze/Boil Protection Chart
*Using a 15 PSI Pressure Cap

	Protects from
% of Cooling System Capacity	Freezing Down to	Boiling Up to *
50	–34º F	265º F
60	–62º F	270º F
70	–84º F	276º F

Solution:

15/25 = 3/5 = 0.60 = 60%
Reading from chart: 60% = 270º F