How to flush rust from my car cooling system?

[EVO-V]

ok naman result... our Hilander is still alive and kicking with original stock radiator since 1997...

TS the best talaga is lav ramon..

If its just for flushing purposes you may use clean tap water. Its going to be drained anyway.

Drain old coolant into a pan or container. Do not wantonly discard this as it is toxic and harmful to the environment.

Then use radiator flush, run for 15-30 minutes, then replace with plain water, then run for 15-30 mins again, then drain. Repeat this until you're satisfied with the clarity of the water in your system, then drain and replace with your preferred coolant mix in and be on your merry way.

Newer cars with aluminum blocks and rads are more sensitive to water only application. So be mindful what you put in.

There is no mystique to this. Just commonsense science and diligence.