how to FLUSH the cooling system

[mikes_box]

dang it.... just replaced the coolant with zerex g-05 after seeing it used here on a diy to find out later i should be using the havolin dex-cool... my question is how do i fully flush the system to get the zerex out... i know how to just open the drain and refill now i want to know how to flush it so i get it all out... thanks.

[jjanari]

wait. Before you go through the trouble, did you check out this page?

http://mike.focke.googlepages.com/antifreezeforyourboxster

is the zerex you got the extended life version? if so, I would think that's ok. basically, you want a coolant that's silicate and phosphate-free iirc.

otherwise, for flushing, I would just run a gallon or so of distilled water.

hopefully others will chime in about whether you even need to replace the zerex.

[Cloudsurfer]

Short of having access to one of those cool BG Products machines that will do this for you, you're going to have to drain and fill a few times with water to get all the old coolant out, then just refill with the appropriate mix of coolant and distilled water.