Well it took 5hrs, a grinder, die grinder, 2 Dremel stones, blow torch and a pint of release fluid to get heater apart. Ready to clean up tomorrow, I had enough by2pm as sweat running in my eyes even stood in front of my very powerful fan. That will be tomorrows job when its cooler, car said 38.5 when I got in it and 34 on way home. 28 in my flat and sun not around to window yet.