I seen another person do the similar 2 tests process like yours.So,the multi meter test has some prove that it works to a good extent.You just proved it by changing the antifreeze and re-doing that test to show us the difference in the readings. Good video !

Your part 1 and part 2 videos are the best I've seen on this test, you've explained very well.

Damn, the voltmeter check is pretty smart. I never knew you could use it to check the condition of the coolant. Impressed as usual :)

Being working in water treatment for past 12 years and making coolants for Power generation Engines and power plants i am 100% agreed about your results, one more thing you can check is its pH value.. we are doing numerous water analysis of coolant and decide when to replace it. good work

Excellent video! Extremely helpful. Thanks heaps :)

thanks robb,can't wait to check my coolant tomorrow morn, cheers

Nice one mate well done 👍

Neat tip. Thanks.

Well done👍🏾

Looks like your were testing at the reservoir. I assume you can also test at the radiator filler opening instead without the engine running?

Greetings from Brazil. What does the friend think about running the engine for a few hours with distilled water, draining it and then adding the coolant?

Most people show the voltage test with engine off?. You state it should be running. How do the test results differ?