Question

q12: before performing any type of cooling system service, it is important to

test the coolant’s protection level and acidity

allow the engine to cool

use a designated recycling container

blow low pressure air into system to expel coolant

Explanation:

Before performing any cooling - system service, safety is crucial. Working on a hot engine can cause burns. Allowing the engine to cool is the first and most important step to prevent injury and damage during service. Testing coolant properties, using a recycling container, and expelling coolant are steps that come later in the service process.

Answer:

allow the engine to cool