[wildwilly4x4]

Yeah I sealed all of the gaps in the cores and whatnot when I swapped in the parallel flow condenser and motor swap. Don't ever have any problems with it running warm unless Im also running AC. Pulling my rock rigs through the mountains, AC on etc. the engine is moving the water through the rad. enough that I don't have any problems. But at idle, when water flow is slowest the heater core is still running full bore hot water into the cold pump suction side of the radiator. I haven't pinched off the line to verify this, but it makes sense, and you can actually hear the water flow through the heater core when sitting at a stop light. In the winter the heater in this thing will literally have you burning it gets so warm. Even just a restrictor plate in the coolant return line may help it out.