1998 528i (E39)
If anyone had a similiar problem or knows anything about my problem I would appriciate it. My car overheats if it sits idle for too long or driving 35MHP or less. On the highway however, driving 55MPH+ at around 2500RPMs the car goes to normal temperature reading. I had the system flushed and a new radiator put in. Fine for about a year and same problem returned. Changed the housing and thermostat and bled the system properly. Fine for a few months and same problem returned with white smoke coming from exhaust for a short period but stopped. Someone told me to try "Bar's Leaks 24 oz. head gasket fix" which worked for a few months. But later the car began to overheat again. Changed the expansion tank, after it poped while driving, replaced radiator hoses and and changed all spark plugs for idling issues. Idle issue gone but overheating still occurs. I do normal oil changes around every 5000-6000 miles with oil filter change as well. I can't seem to pinpoint the problem. No fluid leaks, the hose that goes from the housing to the radiator gets super hard, which it never did before after the car gets too hot. I haven't checked the heater core to see if its clogged or anything. But if anyone has any suggestions or a solution pleas share.
If anyone had a similiar problem or knows anything about my problem I would appriciate it. My car overheats if it sits idle for too long or driving 35MHP or less. On the highway however, driving 55MPH+ at around 2500RPMs the car goes to normal temperature reading. I had the system flushed and a new radiator put in. Fine for about a year and same problem returned. Changed the housing and thermostat and bled the system properly. Fine for a few months and same problem returned with white smoke coming from exhaust for a short period but stopped. Someone told me to try "Bar's Leaks 24 oz. head gasket fix" which worked for a few months. But later the car began to overheat again. Changed the expansion tank, after it poped while driving, replaced radiator hoses and and changed all spark plugs for idling issues. Idle issue gone but overheating still occurs. I do normal oil changes around every 5000-6000 miles with oil filter change as well. I can't seem to pinpoint the problem. No fluid leaks, the hose that goes from the housing to the radiator gets super hard, which it never did before after the car gets too hot. I haven't checked the heater core to see if its clogged or anything. But if anyone has any suggestions or a solution pleas share.