The newer rads are pretty bad. This is where I think most of the head crack issues come from in the Mags- rads separating, draining, and people continuing to drive them.
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I agree, I've had 3 radiators on newer cars leak where the plastic tank crimps to the core. Enough to run the rad really low but not enough to drip on the ground. The radiator in the Duster was only replaced because the core had disintegrated from corrosion and insect impact....ugh, love bugs