2008 LR3 185,000 miles Coolant not circulating causing engine to overheat. I replaced the water pump (looked fine), replaced thermostat (which was shot) but did not fix problem. The heat is not working so I’m guessing a clogged line to the heating core? Any suggestions? There is now some steam coming from throttle body and the coolant bubbles back into the reservoir once I shut it down and open the bleeder.