there's 2 problems with the old heater cores - 1st is frequently the tank[s] are corroded/oxidized so thin re-soldering them to a new core is near impossible, and most rad shops won't try to deal with those ... the 2nd is that they don't use a "section of rad core", they order the correct dimension pre-made, and there's gotten to be a limited selection now ... I took 3 cores to a shop to check and rebuild and they repaired one, found the right size core for another, said 'sorry' about the 3rd, a size nowhere near anything available
Bill
