Posts Tagged: test coolant

How to Test Engine Coolant Using a Multimeter

3 Proven Ways to Test Coolant and Prevent Cooling System Damage Quick Summary There are three reliable ways to test coolant: checking freeze protection with a coolant tester, using chemical test strips to measure pH and corrosion inhibitors, and performing an electrolysis test with a digital multimeter. The multimeter test is especially valuable because it reveals electrical conductivity in the coolant that can destroy radiators, heater cores, and water pumps. When I test engine coolant, I’m not just checking freeze protection—I’m verifying that the coolant still protects the engine from … Read More