23502659 MTU Detroit Diesel Heat Exchanger. We will remove the tank off of your old heat exchanger and put it on a new one. Confirming: We will reuse the square tank from yours and put a new cooling bundle underneath it. Usually takes about a week from date of arrival to date of shipping. It will require you to box up your heat exchanger and ship it to us. You are responsible for getting the old heat exchanger to us in good condition (we don't remove shipping dents from the brass tank). We will return the heat exchanger to you in either hammer finish or prime, per your direction. Read Less