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Blue Smoke From Exhaust: Common Causes And How To Fix

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Blue Smoke From Exhaust: Common Causes And How To Fix
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Not like white smoke issue, blue smoke from exhaust might be quite strange to many drivers, yet it is actually simple to get rip off. In this article we will help you diagnose and fix the blue exhaust from exhaust issue. Before jumping in and dismember your vehicle, let’s list out the tools and gears that you would require:

  • Socket set
  • Wrench set
  • Flashlight
  • Protective gears
  • Screw driver set

The Causes Of Blue Smoke From Exhaust

There are many possible sources of blue smoke from exhaust, and here are the list of frequent causes for this issue:

  • Worn valves or guide seals
  • Turbocharger issues
  • Failure to change your oil or oil filter regularly enough
  • Damage or wear to pistons

Of all the causes, worn seals and valves is the most common seen. Just a few drop leaking oil inside the cylinders and the blue exhaust smoke will appear like a magic trick!

Along with blue smoke out of exhaust, if your car has damaged piston seals or worn valves, it will also cause rattling noises.

The oil can leak inside your vehicle engine, to exhaust parts and cause the changing in color of the smoke when starting. Not only that, it can also cause misfire and damaged spark plugs. The leaks also highly create a mixture between oil and fuel, disqualify both of them and make them unable to protect the internal engine.

We all know this issue is serious, but not every drivers actually give their beloved vehicles a mechanic’s check through. This could lead to the toxic smoke affecting other people, destroy internal car parts, and even cause accident. So how can we deal with the blue smoke out of exhaust?

How To Fix Blue Smoke From Exhaust Issue

In order to fix your car, we will discuss the step by step methods. Set your car at parking brake and keep it at a level ground. And then based on the type of issue, follow any of the procedures.

Step 1: Clean The Engine

blue smoke from exhaust
Have you checked the engine yet?

Poor maintenance can cause sludge accumulation inside the engine. As a direct result, oil reaches the combustion chamber and causes blue smoke, a direct result of clogged cylinder head. The solution for this issue is however simple. First of all, remove the valve cover and do necessary cleaning to rid your engine of debris. Despite various type of engines, the first thing which can cause blue smoke is surely the engine.Clean the drain back holes carefully and recheck and reassemble them. After the mending job, wait for 2 or 4 more days for the remaining oils to clean away.

Step 2: Check The Internal Ventilation

blue smoke from exhaust
The ventilation is one of the parts which will needed to check when blue smoke appears

Internal ventilation is an important part of all engines. They regulate vapor exhaustion. When a hose is plugged or loose, oil can get into the combustion chamber and result in blue smoke out of exhaust. You should remember that ventilation is an important part of your engine. If it is compromised, different problems may occur.

Step 3: Check The Spark Plugs

blue smoke from exhaust
The plugs can also be the reason for this issue

As soon as an engine ages up, the piston rings’ ability decreases, which also spills engine oil into combustion chamber. Where it burns and causes blue smoke from exhaust when starting. To repair such a problem, inspect and remove the spark plugs. If all plugs are not defected, then only work on the ones that require urgent attention.

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Step 4: Change The Stem Seals

blue smoke from exhaust
If all the previous steps has completed and the smoke is still blue, check the stem seals

When one or more valve stem seals are broken, the oil can also enter the combustion chamber and blue smoke may appear. In order to solve this problem, replace the stem seals. You don’t need to replace the whole set; instead, work on those that are severely worn out.

Helpful Information About Blue Exhaust Smoke

The appearance of blue smoke is commonly seen during morning time when you start the engine for the first time on a day. If you don’t follow proper maintenance procedure, the blue smoke from exhaust problem is most likely to occur. So, it is the only solution to avoid such a problem.

If the engine is almost irreparable, you may either tend to rebuild the engine; or else get a completely new one. The latter is preferable because it costs the same as what it takes to rebuild the engine.

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8 Comments
  1. Emmanuel mushi says

    I have subaru forester stb type a2.0 tuthi, sometimes it smokes blue, i found engine oil in the intercooler, what should i do to fix the problem

  2. Emmanuel mushi says

    I have subaru forester stb type a2.0 turbo, sometimes it smokes blue, i found engine oil in the intercooler, what should i do to fix the problem

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  6. Eleazar says

    I have a 2002 Suzuki Grand Vitara,its smoking seriously, i have spent so much money, repeatedly changed the engine oil,added oil treatments, but it’s still smoking .Please what else can I do?

  7. manoj says

    I recently change my piston ring but after that blue smoke out before it was white and engine pulling is poor help me out what to do

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