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[ToyotaJohn]

There is nothing wrong with plastic tanks as long as they're on an aluminum core. Plastic tank copper/brass core radiators are junk. The thermal expansion differences between plastic and the brass headers will cause the tank or the header to crack after time. Try www.completeradiators.com , they carry Modine radiators with a lifetime warranty. Radiators are like everything else, there's junk and there's quality. You can expect nothing but problems from the junk brands.