Question about 2001 BMW 5 Series

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My BMW 525i emits gray smoke.this happens usually after I have driven a while, like to work,let it sit for a few hours then come back.Upon re-start of the car,there is a ton of smoke,but usually burns off quickly.

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You have a stuck or leaking valve that is letting oil into the cylinder when it sits. You need to have the Engine serviced and possible the Head repaired.

Posted on Sep 08, 2009

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I had the same issue along with a loud whistle noise which usualy started only after driving the car hard for a few minutes or when the engine heats up.Both these 2 problems were solved when I had the intake manifold gaskets replaced.

Posted on Sep 25, 2009

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Have you checked your oil lately? is the oil milky in colour? are you low on antifreeze ? if so have someone check your head gasket and valves a.s.a.p

Posted on Sep 08, 2009

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Why bmw x5 battery drain fan not working exhaust blowing out white smoke... what may be happening.


White smoke out of the exhaust indicates moisture (water) in the exhaust. If the car is not driven very far each day, some moisture will collect in the muffler and cause white smoke for a short while after starting. If the smoke is continual, however, you need to watch you coolant level as you may have a blown head gasket.

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I started my 2004 BMW 5 series after a 1 hour drive ( it did sit for about 30 minutes), I then started my car and I noticed that there was a cloud of smoke that came from my exhaust pipes. I again let my...


Serious...no. A problem..yes. You may have hardened valve stem seals or a bad crankcase vent valve...either way it needs fixed.

Eventually the engine will build up burnt oil residue in the combustion chambers and foul spark plugs. It is also ******* those expensive catalytic converters under the car.

These do suffer from engine crank case vent failure quite often although this will trip a code and light the Check Engine lamp.

Sep 13, 2011 | 2004 BMW 5 Series

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Slow to start after sitting a few hours. Engine turns over fast but takes several seconds to start. once started, subsequent starts are good until you wait a few hours.


Check the fuel system pressure--if low, a weak fuel pump may take some amount of time to restore sufficient pressure to start. Does the exhaust emit black smoke for a short time when having starting trouble? This could point to leaking fuel injector(s). Don't know whether doing a computer scan would show anything, but maybe worthwhile. Go to Autozone or similar business for a free scan. Hope this helps!

Mar 06, 2010 | 1994 Ford Explorer Limited

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My 300zx got smoke issue but im not sure.smoke come both sides when i start the car.it got little oil leak from turbos.but once engine got hot the smoke goes away.when driving it doesnt smoke.but it...


It sounds like you may need valve seals.
The oil sits in the head after the engine is cut off and leaks around the seals into the cylinder.
When you start the engine it burns the oil and sends the smoke out of the tailpipes.
It does not hurt anything much if it is not to bad.

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Over haets some time while driven or sitting still


the fan makes a difference. Have you checked the fuse for the fan?

May 20, 2009 | 2001 BMW 5 Series

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Big puff of white smoke at start up after sitting for several hours.


white smoke is water
blue smoke is oil.
nest time try and smell the white smoke see if it smells sweet?
if it does its antifreeze.
and also black smoke is fuel (like a leaky injector )
hope this helps
paul

Sep 19, 2008 | 2007 Nissan Altima 3.5 Sedan

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