Smoke Problems and Solution

When anything goes wrong in the engine the first thing we see is the smoke from the exhaust after that every thing goes "BOOM" Not Really

Her some problems which cause smokes of different colours (not like a rainbow).

White Smoke

How will you know what is Wrong:
                                                       The Engine will start to become hot because of the low level of coolant and the oil will start to become milky and non-sticky , The inside of the cylinders will start to rust from the sides and cause alot of wear in the cylinders and obviously you will start to see alot of white smoke from the exhaust .

Why? :
            The main reason of white smoke is that water or coolant is leaking in the cylinder and is getting burned out because of heat. This is caused by a gasket leak if u just got your engine overhauled you are in for a surprise cause the gasket is not properly alined with the block jets(oil and water jets) and it get worst ,Why ? because once a gasket is pressed it can not be used again on the engine it has to be changed with a new one .

How to Prevent:
                           You can use engine treatment like Slick 50 and AbroLube which i have tried on a few cars for a cure for a small amount of time like 15,000-25,000 KM or the oil Treatments like Stop Smoke ,But they are only for one time use only till you drain the oil . But if you want to cure this for good the head gasket need to be changed by proper mechanics


Grey Smoke

This is the only image i could find which was close to grey smoke

How will you know what is Wrong:
                                                       The car will start to waste oil so the engines oil level will start to decease time to time and if not careful the engine pistons will be seized due to oil not reaching the piston rings and cause alot of wear leading to piston seize.You will not see alot of smoke from the exhaust only a little is seen like puffs of smoke and a bad smell will follow if u stand behind it !
This is also called Blue Smoke

Why? :
            There are mainly Three reasons for this
          1:Gasket Leak
          2:Weak Rings
          3:Worn Cylinder

1. If the gasket is burned due to low coolant level the pressure in the cylinder during compression stroke of the piston causes to crack to a near by jet (Oil or Water Jets)
2. The compression rings of the engine become worn out due to high RPM Revering constantly (not like performance cars or modified cars which are fitted with oil Cooler and dry sumps) which cause the piston rings to weaken and start creating blow by effect, In which the compression of the Air/Fuel mixture is released in the oil sump which takes some oil through the positive crankcase ventilation system and in to the cylinder again to provide a temporary seal of oil to produce enough power to keep the engine running,so it starts to consume oil thus grey smoke is produced 
3. If any Cylinder of the engine is cracked or damaged form the sides in start to consume a lot of oil as well and starts missing a lot at high RPMs and lot of grey smoke is produce due to this which is fairly visible  

 How to Prevent : 

1. For the First reason the Head gasket need to be changed like in the above section 
2. For the second reason u can use a thick oil or Engine Treatments like mentioned above to cure this permanently u need to change the piston rings which is costly
3. If the Cylinder is Damage from the inside it need to be changed because thick oil and treatments can only prevent it for a time being and a New Block for a Engine is freaking Expensive so i suggest changing the car 

Black Smoke

How will you know what is Wrong:
                                                       Black smoke is nothing to be afraid of if u think wasting fuel is a good Idea.Most cars give out a bit of black smoke when they are started mostly in cold weather because that is a mechanism given in every car .But if your car gives constantly black Smoke it is wasting a lot of fuel because something is wrong with it.

Why? :

            This is a Mechanism which is active even in carbureted cars to start quickly in bad weather or u get the engine to the proper VOT (Vehicle Operating Temperature) Which is 75-82 C for carbureted cars and 82-85 C for EFI Cars ,And Diesel cars give out Black Smoke all the time nbut ot that much that the person behind him cant even see were he is going !

This is kinda Normal for a Diesel at Startup

How to Prevent this :

                                   This just means that your car is wasting fuel so u should get it cheeked by a  proper Mechanic

1. If your car is Carbureted u need to adjust the Fuel Mixture Screw located behind the carburetor
2. Modern EFI cars tune themselves but if they give out smoke s well there must be a Problem with the sensor (normally with a Airmass Sensor or a Oxygen Sensor) which controls the amount of fuel going in to the Cylinder
3. If Diesel With Pump the Plunger needs to be checked for wear which r in the Diesel Pump and the fast idle,max idle and the idle setting
4. If Diesel EFI Check that the pressure regulator is working or not for the Common Rail in which the diesel in filled for Injection and the Sensors ofcourse Same as the Petrol EFI