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E39 M5 (1998-2003)

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  #1  
Old 12-09-2011, 01:53 PM
romirome25 romirome25 is offline
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Location: queens
 
Join Date: Aug 2011
Posts: 1
Mein Auto: 2000 m5
brake problem

i have a 2000 m5 ..what does it means when you press on the brake and it stiff going down ..then i release the brake... the car shuts off.i start it up again then a thick white smoke comes out the exhausted..please help dont know what to do anymore
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  #2  
Old 12-10-2011, 10:29 AM
timfitz63's Avatar
timfitz63 timfitz63 is offline
MT = Doppler Shifting
Location: Lorena & San Antonio, TX
 
Join Date: Aug 2010
Posts: 858
Mein Auto: 2007 X3 (MT)
Don't know exactly what's up with your brakes, but that doesn't sound at all normal... Maybe the master cylinder and/or vacuum assist has gone out on you...?

Clouds of white smoke coming out of the exhaust usually signal a blown head gasket, though. Check your coolant level to see if it's decreasing; if so, add only a 50/50 mixture of the BMW blue-green additive and distilled water -- just to ensure that you don't run out of coolant and overheat the engine. If you have nothing else, use straight distilled water until you can put in some of the BMW additive -- but with winter (i.e., sub-freezing temperatures) approaching, be careful about getting the coolant mixture too diluted. Also check your oil filler cap and dipstick for a mayonnaise-like substance in the oil (a sign of coolant mixing with the oil -- another sure sign of a blown head gasket).

If the gasket is leaking badly, don't let this go uncorrected for long; doing so invites any of several potentially costly engine failures!
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