I quit flushing radiators a few years back.  The newer style radiators with
very narrow passages do not flush well unless put in a bath.  For the price
of that, it is cheaper in many cases to just get a new radiator.  Especially
when you add in the down time for flushing.
jimt

On 9/9/05 9:47 AM, "gary hradek" <hradek@YAHOO.COM> wrote:

> Ken has a good idea about testing the rediator but I
> think he is too eager to replace it?
> A good citric acid flush will either fix the problem
> or  cause leaks if the radiator is too far gone.
> Garden grade citirc acid about 10-15%  proceed and
> follow with hot water flushes.   Radiator only not the
> motor.  gary