Clean radiator, cool engine, coolant PH, flow, fans, shrouds.

Lonewolf3165 said

... for those of us using aluminum parts exposed to the coolant. I.E. Heads, Radiators, Intake manifolds etc, I strongly recommend that you avoid using the Extended Life/ Dexcool type coolants in your car. The orange stuff.

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Thanks for that tip. I'll read up. I thought Dexcool was actually better, having perused the label, so I put it in my 02 T&C a few months ago. I changed that radiator just last year and don't want to do that again. I guess I'll drain it now and put the coolant in my slant which doesn't have aluminum except the thick water pump.

One radiator I bought a few years ago came with a warning to insure your car has no stray electrical currents from say a bad engine ground. They claim that can cause an aluminum radiator to corrode thru in less than a week and they aren't responsible. Sounds like the lawyers input, but perhaps possible.