overheating engine after 15 minutes standing or driving
I have an 89 325i E30. I have replaced the radiator with a new one, replaced the fan clutch with a german model, replaced the thermostat with a german model, replaced the waterpump twice ( chinese first then german)Backflushed engine 10 times last time with all freeze plugs and engine block drain. replaced all heat related sensors. No discolered fluid when flushing engine only some rust flakes which drained through freeze plug openings. The hose that come from the thermostat side of the thermostat housing is hot but cold where the hose enters the lower radiator. I removed the thermostat completely but water does not seem to flow from the thermostat housing.All top hoses are blistering hot to the touch after 15minutes including the hoses that goe to the heater core which has been bypassed with a backflush coupler. The engine overheats with radiator fluid standing still or moving after 15 minutes period. Is the thermostat housing itself clogged? What the hell is going on.