White smoke from the car indicates an underlying malfunction in your vehicle. There are various root causes behind this problem, which if left unchecked, will lead to major malfunction. However, sometimes it is only because of the weather. For instance; in winter, the white smoke appears on starting up the engine and then disappears.
This guide lists down some of the most common causes of white smoke from exhaust and tips to prevent it.
Causes of White Smoke From The Exhaust of A Car
Following are the most common reasons for white smoke from exhaust.
1. Broken Cylinder Head
Any damage to the cylinder head or gasket seal causes coolant leakage that can be identified from white smoke out of the engine. This exposes the coolant in the car to the extreme temperature and pressure caused in the combustion engine. Also, the leakage contaminates the engine oil resulting in white sweet odour smoke. You can identify this damage with the help of a dipstick.
Insert your dipstick in the engine oil and observe the oil on the stick. If the oil appears to be foamy rather than dark brown it shows that your cylinder head or gasket seal is broken. The foam can also be observed on the radiator cap.
2. Condensation
If you see white smoke coming from the exhaust on startup, then it may be due to condensation. Condensation is quite a common issue in winter. The puff of smoke caused by condensation will disappear within a few seconds. It is a common climatic issue, which is not related to any improper functioning of vehicles.
3. Coolant Reservoir Damage
The coolant reservoir tank is also responsible for coolant leakage and oil contamination. The chances of getting oil contamination by the reservoir damage are low. Seepage from the reservoir only results in external damage to the tank.
Any damage to the coolant reservoir impacts the cooling of an engine that leads to car overheating. A compressor or leak down tester can be performed on the vehicle to identify the coolant leakage in the car.
4. Oil Leakage
When the gasket is blown out, the oil leaks from piston rings or valve seals and seeps into the combustion chamber where it gets mixed with fuel and comes out of the exhaust. Generally, this smoke is blueish or greyish in colour. It is suggested to fix this issue urgently as it may cause severe damage to other vital parts. In extreme cases, changing your gasket is the best option. If you are looking to replace faulty parts, take a look at these auto accessories and parts for sale.
5. Error in Engine Control Unit
The faulty engine control unit or car computer can cause glitches in the fuel injector, which results in thin white smoke coming from the car exhaust. The fuel injector can not be blamed for this because the engine control unit is not performing adequately.
You can fix it by plugging off the battery, which will restart and reprogram the vehicle system automatically. If it doesn’t, then you might consult with a mechanic.
6. Bad Fuel Injector
The core function of a fuel injector is to pump the right amount of fuel into the combustion chamber at the right time. If it malfunctions, a short-circuit will happen resulting in cloud of white smoke coming out of the tailpipe. You can fix it by replacing the fuel injector.
7. Engine Block Crack
Any crack or damage in the engine block can cause smoke. It is considered a significant issue and fixing it can cost you a fortune. Therefore, it may be a good idea to look for used cars for sale in the UAE rather than spending on repairs.
How to Stop White Smoke from Exhaust
There are many preventive measures that can reduce the white smoke coming from the exhaust. See the succeeding precautionary steps that will answer your question of how to stop white smoke from exhaust:
- Check the coolant level in your car weekly or at least bi-monthly. Continuous reduction in the level can indicate coolant damage or seeping.
- Inspect the manifold gasket and look for any crack, rust or damage.
- Clean your fuel injector every month. You can also change it every six months for smooth functioning.
- If you have a diesel engine, replace your fuel pump after 4000 km.
FAQs
Does white smoke always mean blown head gasket?
The white smoke cannot be blamed on the blown gasket every time, but it is the most common reason for white smoke.
How can I fix white smoke?
Fixing white smoke all by yourself can be a tough one, as it requires proper mechanical support. However, you can prevent it by measuring coolant levels, replacing fuel engines, and inspecting gaskets on a regular basis.
That sums up all the common causes of white smoke out of the engine. Since identifying it on your own can be a tricky business, it is suggested to seek professional help and get the problem fixed as soon as possible.
Stay tuned to the UAE’s leading auto blog to know more on what causes white smoke from the engine.
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