White smoke from tailpipe

I have heavy white smoke coming from my tailpipe. My truck is also idling roughly.
Experienced mechanics share their insights in answering this question :
Your engine is getting coolant into it and producing the white smoke out the tail pipe. The coolant could be getting into the motor from the intake, head gaskets, or head crack. The system would need to be checked to determine where the leak is coming from. Have a certified technician come and test the vehicle for you. They will be able to come to your location and make the repairs that are needed to resolve this issue.

How to Identify and Fix Common car Problems ?

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White exhaust smoke from the tailpipe usually means raw diesel is passing through the combustion chamber into your exhaust stream. This happens when the engine`s combustion cylinders aren`t hot enough to burn the diesel.
Usually, white smoke indicates that the diesel fuel is not burning correctly. Unburned diesel fuel will make its way through the exhaust completely unused.
WHITE OR GRAY SMOKE

White or gray-looking smoke is bad, typically indicating a blown or leaking head gasket. This happens as coolant combines with the fuel and air mixture in your engine`s combustion chamber. A blown head gasket could destroy your engine if left untreated.

White smoke usually means coolant is getting into the combustion chambers of your vehicle. This generally happens because of a cracked or leaking head gasket, which allows coolant to seep into your cylinders. In extreme cases, you will need to replace your head gasket.
To fix white smoke coming from your exhaust, I would first check the coolant level, before inspecting the piston rings and valve seals for signs of leakage. Look for cracks in the intake manifold gasket, head gasket, cylinder head, and engine block. Finally, clear or replace the fuel injector.
When white smoke occurs at cold start, and then disappears as the engine warms up, the most common causes are fouling deposits around piston rings and/or cylinder glazing. Use of our Flushing Oil Concentrate and FTC Decarbonizer address these respective problems.
Faulty fuel injector: Another possible cause of excessive white smoke from the exhaust pipe is a bad fuel injector. The injector can leak or become stuck open and deliver too much liquid fuel into the combustion chamber. The excess fuel causes thick white smoke to be produced and released from the exhaust pipe.
White or Gray Smoke from Exhaust – Just like if you see white smoke from under the hood, persistent white smoke usually indicates a coolant leak. If there`s only a little bit, it`s probably condensation. Blue Smoke from Exhaust – If you see blue or dark gray smoke, that`s an indication of burning oil.
White smoke from the exhaust: This could be steam caused by condensation in the exhaust pipe or a more serious issue caused by an engine coolant leak. Excessive amounts of white smoke could indicate head gasket failure.
White smoke from unburned fuel vapor smells like raw gas (because it is raw gas), so there`s no mistaking it for water/coolant-induced white smoke. In even rarer cases, a hot muffler or catalytic converter may cause the fuel vapors to ignite, blowing the exhaust system clean off the vehicle.
Recommended Services. Hi! A leaking turbo will usually present itself through white smoke exiting the exhaust. Usually the white smoke will result from the turbo leaking oil internally but will occasionally result from internal coolant leakage.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I have white milk coming out of my exhaust pipe but I don’t see it mixing in my oil pan when I check my oil
ANSWER : In most cases, the white smoke is an indicator of coolant finding a way into the combustion chamber. This could happen through a damaged head gasket or a crack in the cylinder head or engine block. Most of the time, this would also be followed by milky oil or overheating problems. However, it could also be a problem with the EGR system, or an extremely rich fuel trim. The best thing to do is have a professional mobile mechanic complete a smoke coming from exhaust inspection, so they can pinpoint the source of your issues and recommend a repair.

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heavy white smoke tailpipe
ANSWER : That sounds like steam coming out of the tailpipe. You may have noticed the coolant level being low. If coolant is getting into the cylinders, it makes steam come out of the exhaust. This is a classic sign of a failed head gasket. Removing and inspecting spark plugs can confirm this. You may also notice the oil on the dipstick looks like a foamy cappuccino. Don’t drive it until you have this checked or the engine may get destroyed. Have a certified technician, such as one from YourMechanic, diagnose the smoke problem and guide you with repairs.

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Was blowing smoke, bluish white smoke, heavy
ANSWER : Hi there. In most cases, when white smoke blows out of the tail pipe, it’s an indicator of coolant being in the oil and lubrication system. It’s typically caused by a blown head gasket, which could also lead to significant engine damage. It’s best to have a professional mobile mechanic come to your location to complete a smoke is coming from exhaust inspection so they can verify the source of the smoke and recommend the appropriate repairs.

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Hello, i had my head gasket repaired and after 8 months it has started making white smoke come from exhaust again and I can smell
ANSWER : Hello, thank you for writing in. With white smoke coming from the exhaust, the smell of coolant, and the (very likely although unmentioned) lowering of the coolant level, it is quite apparent that the coolant is making its way passed the head gasket and into the combustion chambers. Unless you have a cracked head, engine, or other serious damage, the head gasket is very likely the issue. Make sure you are adding coolant to compensate for the loss. Low coolant levels will not give you accurate temperature readings on your dashboard, as the sensor is located at the top and needs to be submerged in liquid to give you an accurate reading. As far as repairing the issue, replace the gasket again, and in the process inspect the old gasket for signs of failure or indications on what caused the leak the second time. If replacing the head gasket again does not solve the problem, you know you have a larger issue with the engine and can take further diagnostics from there. For more help from our technicians, contact our service department to schedule an appointment.

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Blue smoke black smoke white smoke what do they mean
ANSWER : Hello. If there is blueish smoke coming from the exhaust, then that is an indication that the engine is burning oil. This can come from the valve stem seals or from the piston rings. It can also come from the PCV system if it is not working correctly. If the vehicle is a 2015, then you may want to take it to the dealer if it is under warranty. I would also check the oil level is the oil have been changed recently. If the oil is overfilled, then this will occur. If you would rather not go to the dealer, a local expert from YourMechanic can come to your car’s location to diagnose the smoke and advise you on the repair.

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My engine is smoking white smoke
ANSWER : From what you’ve described, it sounds like you have a head gasket leaking into the engine cylinder and then out of the exhaust. I recommend having a compression test done to confirm this and see where exactly the leak is. A coolant pressure test may also be necessary to pinpoint what exactly is leaking.

If you need assistance with these checks, feel free to contact a certified technician who can perform the necessary tests to diagnose the source of the smoke. An accurate repair can then be made once the problem has been pinpointed. Good luck.

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Excessive smoke releases from the tailpipe after ticking noise
ANSWER : Hi there. In some cases, if too much oil is placed in the motor, "oil blow by" will escape past piston rings; but as the mechanic stated, it typically would only last a few days. But, if they drained the oil and made sure the right amount was in the crank case and filter, that should not occur. However, the ticking noise is concerning. In most cases, the ticking noise upon start up is an indicator of lack of lubrication in the cylinder heads. I guess where I’m going here is that I’m not very confident in this mechanic’s diagnosis. I would highly recommend having a second opinion by having a professional mechanic complete a smoke is coming from exhaust inspection.

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I have gray smoke coming out of my tailpipe but it’s not heavy smoke and my car check engine light is orange​ my car shut off
ANSWER : You did not mention why the radiator was replaced but I think your engine was overheated causing the head gasket to go bad. This would cause the white smoke out of the tail pipe and an engine misfire and overheating can cause the check engine light to be on. I recommend having the engine checked for leaking head gasket and scan the computer for codes.

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