Quote Originally Posted by duskylim View Post
Dear eat:

In most radiators, there is a drain plug on the bottom that can be reached from underneath the radiator.

It is usually a metal or plastic screw with a rubber washer. You can loosen it with a pair of pliers but be gentle - or you may break it.

To drain the radiator, WAIT TILL THE ENGINE IS COLD, then remove the radiator cap and loosen (do not remove) the drain plug, it usually has a slot cut in it to facilitate draining after it has been loosened a few turns.

The best and safest way to flush your radiator is to just add a pure distilled water like Absolute and then drain 1-2 liters away every weekend when the engine is cold.

Refill with more distilled water to make up for the amount you flushed - remember to fill the overflow reservoir too.

Because it has no minerals, the distilled water will slowly dissolve dirt and minerals (scale) that has built up in the engine.

Flushing out some of that, 1-2 liters will, over maybe a year will inevitably carry out most of the stuff.

Hope this helps.

Best Regards,

Dusky Lim
This is helpful for newbies like me sir. Bookmarked this page. Thanks.

I bought this Castrol Coolant Concentrate. Is it ok to use it instead of the distilled water?