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Gray smoke coming engine - 2003 Mazda Mazda6

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Most likely your radiator is leeking. If its low and ur engine is iver heating that is most likely the problem. 80% of the time theres smoke coming from ur engine, its a leak of some sort. Could be oil as well

Posted on May 03, 2013

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Posted on Jan 02, 2017

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I'm looking to purchase a used car. I've been doing online research and saw this webpage http://www.usedcarsmells.com . They talk about exhaust color and smells. Is it true that you could tell a lot about...


Yes this is correct, you can get important information from the colour of smoke from the exhaust:

Blue/Gray Smoke: Blue/gray exhaust smoke is an indication of oil burning in the combustion chamber. These are possible symptoms and causes:
Valve Seals: Leaking valve seals will cause blue/gray smoke at startup because oil leaks past the seals into the cylinder after the engine shuts down.
Valve Guides: Excessive clearance between the valve stem and the valve guide allows oil to leak past the gap into the cylinder.
Piston Rings: Worn or damaged piston rings will cause blow-by resulting in blue/gray smoke.
Worn Cylinder Walls: Worn cylinder walls cause blow-by resulting in blue/gray smoke.
PCV System: A stuck closed PCV valve will cause excessive crankcase pressure resulting in blue/gray smoke.
Black Smoke: Black exhaust smoke is an indication of a rich fuel condition. These are possible causes:
Fuel Injectors: A leaking or dripping fuel injector will cause a rich fuel condition.
Fuel Pressure Regulator: A stuck closed fuel pressure regulator will cause a rich fuel condition.
Fuel Return: A restricted fuel return line will cause a rich fuel condition.
White/Gray Smoke: White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:
Cylinder Head: A crack in the cylinder head (around the coolant jacket) will cause coolant to enter the combustion chamber.
Engine Block: A crack in the deck of an engine block near the coolant jacket will cause coolant to enter the combustion chamber.
Head Gasket: A damaged or blown head gasket will cause coolant to enter the combustion chamber resulting in white/gray smoke coming from the tailpipe.

Jan 17, 2015 | Cars & Trucks

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Why is my car losing oil?


Hi..That is a lot of oil you are losing, The engine is definitely toast.
Blue/Gray Smoke: Blue/gray exhaust smoke is an indication of oil burning in the combustion chamber.

Valve Guides: Excessive clearance between the valve stem and the valve guide allows oil to leak past the gap into the cylinder.
Piston Rings: Worn or damaged piston rings will cause blow-by resulting in blue/gray smoke.
Worn Cylinder Walls: Worn cylinder walls cause blow-by resulting in blue/gray smoke.
PCV System: A stuck closed PCV valve will cause excessive crankcase pressure resulting in blue/gray smoke.
Is it worth fixing? Depends on how much this car means to you, Mileage of vehicle, and just how much money you want to throw into a 20 year old car..The engine will need to be completely overhauled or change out with a used engine probably close to 800- $1000 either way..Probably have a lot more into this than you can live with I'm guessing
Is it worth fixing?

Jan 16, 2015 | 1996 Geo Prizm

2 Answers

Blue smokes come out tailpipe when i start the car but stops afte


Helllo there
Symptom: Gray or blue smoke from the exhaust. You notice gray smoke coming from the exhaust when you start your car. The smoke may or may not disappear after the car is warmed. If it is, it is less noticeable. The smoke may have a bluish tint to it. Possible causes:

  1. The engine's piston rings may be worn.
    The Fix: Replace piston rings. (Generally not a DIY job)
  2. The engine's valve seals may be worn.
    The Fix: Replace valve seals. (Generally not a DIY job)
  3. Damaged or worn valve guides.
    The Fix: Replace valve guides. (Not a DIY job)
Symptom: Engine uses more oil than normal, and there is some smoke from the exhaust. The oil level is low between oil changes. It appears that the oil is being burned by the engine because of the smoke in the exhaust. You may or may not notice the engine doesn't have the same power as it used to.
Possible causes:

  1. The PCV system is not working properly.
    The Fix: Replace PCV valve.
  2. The engine may have mechanical problems.
    The Fix: Check compression to determine engine condition.
  3. The engine's piston rings may be worn.
    The Fix: Replace piston rings. (Generally not a DIY job)
  4. The engine's valve seals may be worn.
    The Fix: Replace valve seals. (Generally not a DIY job)

Jun 01, 2010 | 1989 Buick Electra

1 Answer

Upon starting the 1995 Camry the engine dies. There is also grey smoke coming from the tail pipe. Checked the oil and there is no water in it.


Is it gray, bluish gray, or white? White smoke, during warm weather, indicates that you have a head gasket out and it's vaporizing water, it will look much like it does when you first start it on a cold day. Bluish gray indicates burning oil, which could be bad valve seating, severe engine wear on your piston rings and oil is blowing past them into the combustion chamber. Grey smoke is probably water as well, though it could be contaminated with oil, or the vehicle could be running too rich, getting too much gasoline. But typically this is more of a black smoke than gray.

Nov 10, 2009 | 1995 Toyota Camry

1 Answer

Hard starting and to much smoke when engine running idle and sometimes fluctuation


Smoke usually there's a problem.... Bluish gray smoke means you're burning oil (could be a number of things like piston rings, valve seals)... White smoke means could mean you're burning transmission fluid, or there's a crack in the gasket or engine block.... Black smoke could mean you need your air filter changed, bad fuel injectors, bad distributor cap, ignition coil... I would guess it's probably black smoke coming out of your exhaust from the sounds of your symptoms...

Aug 11, 2009 | 1993 Saturn SL1

1 Answer

White smoke coming from exhaust when accelerating


Is the white smoke steam or water? If so it is a blown head-gasket. Fix ASAP or you will ruin the engine. Or is exhaust blueish/gray or gray and smells like gas or oil. If this is the case then it could be a fuel injector, spark-plug (or no spark to plug), valve seals, piston ring/s, or clogged air filter.

Jun 20, 2009 | 1996 Toyota Camry

1 Answer

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.

Jun 04, 2009 | 1990 Nissan 300ZX

1 Answer

Turbo


i think that you have to check the turbo for leak oil or problem after rebuild

Apr 21, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

White and gray smoke coming out back and underneath 1995 Chevy Bl


Too late to check now... you've got a blown head gasket. When the gauge starts to give you any indication that something's not right you must shut it down or this kind of thing happens. Could have started as a bad water pump, hose etc. With low coolant from that (or anything else) continued operation will kill the whole thing!...Sorry!!

Feb 19, 2009 | 1995 Chevrolet Blazer

1 Answer

Gray smoke & lost of power


The engine gray smoke is from excessive fuel burning to give the engine power. I am assuming the vehcle is an automatic transmission. Sound like I would have the transmission check for a lock up torque convetor. The transmission maybe taking off in second gear and starting out in a fail safe mode. I suggest taking to the dealer or tranmission shop.

Jan 26, 2009 | 2005 Audi A4

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