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Clean radiator without flushing it?

1958 Views 1 Reply 2 Participants Last post by  kartelan02
Ambiguous title.

I went out to AutoZone and bought some Prestone radiator cleaner. I read the instructions about the quick clean and the rigorous clean. For the rigorous clean, it says to empty the cooling system, then refill with only the cleaner and water, then drive on that for a few days before flushing and refilling.

However, I discussed it with the guy at autozone, and he said it works just as well to simply ADD the cleaner to whatever is currently in the cooling system, then perform the flush and refill after a few days.

So I added what I could to the radiator, and poured the rest of the bottle in the reservoir, then took it for a 1-hour drive to get the coolant/cleaner circulated. I'll drive on that for the week, and flush and refill the system this weekend as I normally would.

Is the an effective method?

I own a '99 model, and the previous owner used non-dex coolant with hose water, so the thing is still filled with gunk after its first flush a few months ago. The plan is to clean it out fairly rigorously and put in 50-50 DEX and distilled water.
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