Quote:
Originally Posted by GH85Carrera
On my old school El Camino I just drain the antifreeze into a bucket and re-fill with water. Then the little plastic gizmo snaps into the radiator fill and hooks to a garden hose refill with water. Fire up the engine and wait for the heater to start blowing warm so I know the thermostat has opened. Once that happens I kill the engine and open the drain valve and refill and repeat.
I just use 50% antifreeze & tap water. I flush my system every other year.
Last Thanksgiving I did a engine swap and I pulled the radiator out to get it out of the way. One of my buddies said I should get it tanked and flushed at a local radiator shop. I handed him a flashlight and told him to take a look. He was amazed at how clean it was.
Once I am done I put the old antifreeze into the bottle the new stuff came in and take it to the local recycle center.
The overflow tank on the Elky is real easy to remove and pour out and clean.
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Cold water will close the valve. Best to pull it out of the system for the flush.
As far as the original question, it depends on the layout and connection of the resevoir. I have always drained EVERYthing, then flushed with regular water until no more coolant. THEN I flush with distilled and then refill with coolant and distilled at the needed ratio.
BTW, if you have access to Reverse Osmosis water, that is good enough.