Does the radiator in a petrol XJ have the tanks held on by lots of little metal tabs like the TD Xjs do?? Im not sure - but if so, ask the guy that you go to for the fix to guarentee that the radiator wont fail after he's bent those metal tabs out and in again. I learned the hard way after the radiator bloke i went to cleaned out my radiator but then said he wouldnt guarentee his work because he suspected the metal tabs had been weakened from being bent up (for tank removal) and back again (tank replacement). The "second opinion" bloke i went to said he wouldnt have repaired my radiator for that exact reason - he couldnt guarentee that the radiator would hold pressure.
A better repairer will explain all this to you - a dodgy one wont know (or care). So go in fore-armed with my tale of woe
Anyone want to buy a second hand TD radiator that may or may not work ?????