On this age car I do not think the brand of radiator makes alot of difference. Don't forget to change the automatic transmission fluid and filter while you are at it. You will need the ATF filter, pan gasket and crush rings (one for the pan and one for the torque converter). Don't overtorque the pan gasket or you will get to replace it again. I can't say I have ever had any problem with the Nissen radiator - I think that is what I am running in my 300D now.

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Jim