White Smoke From Exhaust When Accelerating- Potential Reasons and Easy Solutions

When you hit the gas pedal, have you noticed white smoke coming out of your car’s tailpipe? While it’s normal for some vapour to escape, excessive smoke could indicate a severe problem. 

White smoke coming from the exhaust is a common issue many drivers face. It’s usually a sign that something is going wrong inside your car’s engine, which could lead to costly repairs if not addressed promptly.

Understanding what’s causing the white smoke is critical to ensure your vehicle performs optimally. In this article, we’ll discuss the most common reasons white smoke comes from your exhaust when accelerating and what steps you can take to get it back running smoothly. 

So, if you notice excessive smoke coming from your car, keep reading.

Causes of White Smoke Emission From the Exhaust  

1. Blown Head Gasket

One of the most frequent reasons for white smoke coming from your exhaust is a burst head gasket. This dangerous issue needs to be fixed right now since if left unattended, it could result in additional engine damage.

 When the head gasket breaks, coolant can seep into the combustion chamber, creating white smoke. The head gasket is in charge of maintaining pressure between the engine block and cylinder head. 

2. Engine Overheating

If your engine is overheating, it can also produce white smoke from the exhaust. This can happen due to a damaged radiator, cooling system, or a malfunctioning thermostat. When the engine overheats, it can cause the coolant to boil and create white smoke.

3. Faulty Fuel Injectors

Faulty fuel injectors can also produce white smoke. When the injectors malfunction, they can cause the engine to run too rich, which means too much fuel goes into the combustion chamber.

This excess fuel can’t burn completely, and the unburnt fuel produces white smoke.

4. Damaged Turbocharger

If you drive a turbocharged vehicle, white smoke from the exhaust when accelerating can indicate a damaged turbocharger. The turbocharger spools up and compresses air for the engine to burn.

If it is damaged or malfunctioning, it can cause white smoke to come out of the exhaust due to burning lubrication oil.

5. Cracked Engine Block

Another possible reason for white smoke coming from your exhaust is a cracked engine block. When the engine block is damaged, coolant can leak into the combustion chamber, which creates white smoke.

This is an expensive problem to fix and requires a mechanic’s inspection.

6. Low Coolant

Although the loss of coolant itself doesn’t always indicate a blown head gasket, white smoke coming from the exhaust is almost always a sign.

Moreover, if the head gasket breach occurs slowly enough or outside the engine block and not between the cylinders, you may have a blown head gasket without experiencing white smoke from your exhaust. A pressure test is necessary to top off your coolant continually.

How to Stop White Smoke? 

Check Your Coolant Level

White smoke from the exhaust can indicate the engine is overheating or has an internal coolant leak. Check your coolant level; if it’s low, fill it up to the required mark with a 50/50 mix of coolant and water.

A low coolant level can cause the engine to overheat, which can cause damage to the engine.

Inspect Your Head Gasket

If your coolant level is good, check your head gasket. Cracks, leaks or a blown head gasket could lead to coolant leaking into the engine block, causing white smoke to be emitted through the exhaust. Inspect the head gasket for visible damage, and take it to a mechanic if any issues are found.

Replace Fuel Injectors or Fuel Pump

White smoke from the tailpipe can also indicate a problem with the fuel system.

If the fuel injectors are faulty or the fuel pump isn’t functioning properly, too much fuel can be injected into the combustion chamber, causing the engine to produce white smoke. 

If you notice other symptoms like a drop in fuel efficiency or hesitation when accelerating, it might be time to replace the fuel injectors or pump.

Check Your PCV Valve

The Positive Crankcase Ventilation (PCV) valve regulates the pressure and flow of the gases produced from the engine to the exhaust. A faulty PCV valve can cause the engine to produce white smoke from the exhaust.

Check your PCV valve and replace it if it’s broken or clogged.

Get a Professional Opinion

If you cannot determine the cause of the white smoke emission, it’s best to take your car to a mechanic specializing in exhaust systems. A mechanic can diagnose the issue and suggest the best course of action.

The Bottom Line 

Your exhaust emitting white smoke indicates a major issue that has to be addressed right away. To avoid further harm to your engine, it’s necessary to get your car inspected by a mechanic as soon as possible. 

Don’t hesitate to take action because waiting could put you and your car in danger. However, by following the tips mentioned above, you can find the root of the problem and fix it. 

Keep in mind that frequent servicing and maintenance are essential to maintaining your automobile in good shape and reducing problems with the exhaust system.