1989 BMW 535i CAR OVERHEATING

1989 BMW 535I
179,000 MILES • 6 CYL • FWD • AUTOMATIC
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MIKEYYN
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My Car was overheating about 3 wks ago, I replaced the thermostat, that seemed to work , now it is overheating again, when I turn on the heater the temp goes down, that was not the case the last tome, what is the problem?
May 22, 2009 at 8:29 PM
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RASMATAZ
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Could be airlock in the system, clogged up radiator, defective water pump and cooling fan -overheat continues get it block and pressure tested to rule out a blown headgasket cracked head or blockintake leak-
May 22, 2009 at 8:41 PM