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7 Series - E65 / E66 (2002 - 2008)
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Old 02-16-2012, 03:26 AM
okegs4ever okegs4ever is offline
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Location: bham al
 
Join Date: Oct 2010
Posts: 31
Mein Auto: 03 745li and some more ca
03 745li bad coolant leak and also exhaust white smoke

03 745li...there are few issues with it

the car leaks antifreeze. if i fill it up, it will last maybe 2weeks at the most. the car also leaks oil, i have been told it is the vacuum pump, alternator bracket gasket i think and some kind of switch i think its vacuum pump switch (which has been changed) or oil pressure switch or something of that nature.

after changing the switch the leaking reduced but it still leaks. i drove the car for 7hrs and when i arrived from my trip, i was parked and had car running and it started smoking (white smoke) from exhaust with a bad smell, car acted like it lost power for a second but we cut it off and added water to it and it stopped smoking. i also noticed it was smoking while on a hill and when we brought it to flat surface it stopped smoking. it did this again while parked on ahill. any idea what could be the cause of this? they did a test and couldnt replicate issue but wrote this
dme codes
27A0 FAN EBOX
273D CONVERTER BANK 2
2761 SECONDARY AIR BANK 2
What could these mean?

for the leak, i took it to mechanic and they said the expansion tank, hose to expansion tank, both thermostats and lower radiator were cause of leaks and quoted me a high price to fix it. they advised me not to drive it because the leak is worse since they ran a pressure test on it. this car was driveable before but now it is totally undriveable because antifreeze is just pouring out of the car. i took it to another mechanic and he said the leak looks like it is coming from behind the engine between the engine and the transmission and he is having problems locating where the leak is coming from, any idea what these people could have done? it started doing this after i took to them and they did the so-called pressure test.
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