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Blue smoke from exhaust when cold - 1995 BMW 5 Series

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Its burning oil, if it only happens for a few seconds on start up it is probably fine.

Posted on Dec 02, 2012

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THERE IS TOO MUCH WHITE SMOKE IN EXHAUST PIPE OF MY TOYOTA COROLLA 2E ENGINE WHAT CAN I DO


white smoke when starting from cold is
condensation of moisture in the muffler/ tail pipe
that is normal .... till the engine warms up

heaps of white smoke when hot
suggests coolant/steam in the combustion chamber

blue smoke is oil
black smoke is fuel

Nov 23, 2016 | Toyota Cars & Trucks

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Could the problem of white smoke when start up in morning be that the cold start sensor could be at fault


White smoke is actually normal Susan. It isn't smoke, it is steam.

White is steam
blue is oil
black is rich mixture

Gasoline contains water at molecular level, and when it burns it condenses through the cold exhaust system as steam vapour. You should find it disappears when the engine and exhaust is warm.

May 12, 2016 | Cars & Trucks

2 Answers

Blue smoke coming out of the exhaust


start car when engine cold - place some paper in front of exhaust pipe.
If you see dots of oil you have a major engine failure with the lower block of your engine or the rings. This costs a lot of money to fix !
I sent my car to wreckers to be crushed when I had smoke and burning oil smell plus oil when it was cold.

If it is water when engine when engine cold you may have a cracked engine head , cracked head or blown head gasket.
Less expensive to fix but may require head to be re machined if head is warped. If head is cracked then head will need welding.
A cylinder compression test will confirm this type of head problem.

Jan 24, 2016 | 2000 Mazda MPV

1 Answer

There's blue smoke coming out of my exhaust on my 2003 ford explore


Here's a link on why your vehicle has blue smoking coming out of the exhaust. Blue Smoke From Exhaust

Nov 25, 2015 | Ford Cars & Trucks

1 Answer

What is the cause of water dripping out exhaust pipe and engine smoking excessively?


Cold weather right? Dripping is the water condensing from the exhaust gases. The "smoke" is more than likely water vapor, just like your breath in cold weather. If you have smoke (black) in warmer weather, you have an excess fuel problem and won't pass emmision tests. If blue smoke you have oil leaks into the coubustion chamber. Also will not pass emmisions test.

Mar 04, 2015 | 2003 Ford Explorer

2 Answers

Exhaust smoke upon cold start up


you don`t say what color the smoke is so this is a basic indicator with different colored smoke.if it is white smoke like you would see from any car started up on a cold day then this is normal for cars as the exhaust is hotter than the ambient air temperature.if it is a thick heavy looking white smoke and has a sweet odour then this can indicate a coolant leak into the combustion chamber after sitting overnight such as a bad head gasket,if it is a blue smoke then this indicates oil leaking into the cylinders past the valve seal or valve guides on a cylinder that is on the intake stroke when the motor was shut off,if it was rings it would show only under acceleration,if it is black smoke this indicates an overly rich fuel mixture.

Mar 04, 2011 | 1997 Toyota Camry

1 Answer

I have a 98 mazda 626 only when its cold i have like a blue gray or even white smoke coming from the exhaust don't know what it could be?


Your exhaust valves have deposits on them that don't allow for a good seal when the engine is cold, or your piston rings are worn, allowing oil to get past when the engine is cold. In either case the seals improve as the engine warms, making the smoke go away. You can try to see if an oil additive will improve your situation.

Oct 09, 2010 | 1999 Mazda 626

1 Answer

Smoke comeing from exsost


You have a blown headgasket, cracked cylinder head, cracked block only if the color of the smoke is a constant white...requires extensive tests compression etc.
if uits blue in color you have oil passing the rings and out the exhaust valeves on the exhaust stroke, possible collapsed oil rings or valve guide stem seals and knerling ...requirements machinist work.
Momentary cold start white smoke can be normal residual condensation that clears rapidly after start up, blue intial smoke on only the start up after sitting for hours is signs of valve guide wear to be done by a machine shop.

Aug 26, 2010 | 1994 Mercury Grand Marquis

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