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The BMW Range
5 Series
E39
523i Overheating Problem
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<blockquote data-quote="David Y" data-source="post: 28277" data-attributes="member: 14912"><p>Radiator, which was changed abt 18 months ago, leaked. Mechanic claimed that the leak was due to pressure as result of a failed air-con fan. Replaced a new radiator and air-con fan, overheating still persisted and pressurized coolant system, replaced thermostat and housing. Overheating still persisted, changed upper and lower hoses - still overheating. Water pump working, viscous fan working.Mechanic deduced that it is an engine problem. Engine compression is leaking into the coolant system due to head gasket failure. [From another BMW Forum- The gasket can fail around a/the fire rings and a water way which pressurises the cooling system and also sends combustion gases into the cooling system, boiling the coolant and overheating the engine pretty rapidly.] He recommends changing the engine as top overhaul costs the same.Sifu and guru, have you encountered this problem before? What was your fix? Appreciate your advice.Regards and Gong Xi Fa CaiDY</p></blockquote><p></p>
[QUOTE="David Y, post: 28277, member: 14912"] Radiator, which was changed abt 18 months ago, leaked. Mechanic claimed that the leak was due to pressure as result of a failed air-con fan. Replaced a new radiator and air-con fan, overheating still persisted and pressurized coolant system, replaced thermostat and housing. Overheating still persisted, changed upper and lower hoses - still overheating. Water pump working, viscous fan working.Mechanic deduced that it is an engine problem. Engine compression is leaking into the coolant system due to head gasket failure. [From another BMW Forum- The gasket can fail around a/the fire rings and a water way which pressurises the cooling system and also sends combustion gases into the cooling system, boiling the coolant and overheating the engine pretty rapidly.] He recommends changing the engine as top overhaul costs the same.Sifu and guru, have you encountered this problem before? What was your fix? Appreciate your advice.Regards and Gong Xi Fa CaiDY [/QUOTE]
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523i Overheating Problem
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