Can a Bad Fuel Pump Cause Blue Smoke Out the Exhaust
A very common just troublesome problem with a vehicle is when at that place is bluish smoke coming from the exhaust. Common causes of blue exhaust smoke include bad valve seals, valve train habiliment in general, the PCV valve, called-for transmission fluid and more.
Blue fume indicates that your gas engine is called-for oil (or in rare cases transmission fluid). The only question is how is oil getting into the combustion chamber?
Blue Smoke From Exhaust Causes
Here are the nigh mutual causes of blueish fume coming from your exhaust. Turbocharged engines are now so common they have made the list.
Worn Valve Seals
Your car'due south valves let air and fuel into the combustion chamber. They are lubricated similar the residuum of the motor. Valve seals are utilized to keep the oil from riding downwardly the valve and into the combustion sleeping room while the valves let air and fuel into the cylinder.
If your valves are worn, you'll see a hint of blue fume while the engine is running. But, it'll be at its worst when the engine is starting up.
Piston Rings
Each piston in your vehicle's engine is responsible for pushing the air and fuel mixture into a smaller and smaller space before the spark plug fires. This is chosen compression.
The gap between the cylinder wall and the piston is so tiny that you can't get a piece of paper in-between them. On summit of this, piston rings are wrapped around the piston for an even tighter fit. This helps keep oil out of the combustion sleeping accommodation.
When the piston rings fail, oil passes through them and into the combustion bedchamber, and yous'll go blue smoke from your frazzle. This is nigh common in high mileage engines and is a sign that the lesser end has worn out.
PCV Valve
Your vehicles PCV valve is responsible for taking the pressure that builds up in the oil pan and moving information technology to the intake side of the engine. It opens and closes, which ordinarily keeps the intake free of oil. If information technology stays open, oil will build up in the intake, and you'll end up with blue smoke coming from the exhaust.
Turbocharger
As machine manufacturers constantly push for improve fuel economy, turbochargers have been finding their fashion into regular, everyday vehicles. When a turbocharger goes bad, information technology will allow oil to get sucked into the combustion sleeping room. Usually it'll exist a big feather of blue smoke.
Bad Glow Plug (Diesel Engines Only)
Glow plugs warm up the engine enough for the combustion of diesel fuel when a diesel engine is cold. If one of the plugs has gone bad, it'south going to cause blue fume until the motor has warmed all the fashion upward.
How to Fix Blue Smoke Coming From Exhaust
Blue smoke is different than white or black fume. They are caused by different engine problems. When you see blueish fume, yous need to find out how oil is getting into the combustion chamber.
PCV
The get-go thing that you're going to want to do is check the PCV valve. It's far and away the easiest matter to check. Here is a really keen video from YouTube that shows exactly how you lot would go about doing so.
Glow Plugs or Turbo Vehicles
Later checking the PCV valve, it's time to movement onto the turbo (turbocharged cars just) or glow plugs (diesel only) and see if either of them are bad.
How to test glow plugs (YouTube)
Engine
Valve Seals
One time we are sure that all of the easier stuff to check is not causing the blue smoke, information technology's time to turn to the within of the engine. You'll want to check the valve seals. At that place are means to get a pretty proficient idea if they are bad without always cracking the engine over.
Bad Valve Seal Symptoms (ItStillRuns)
Piston Rings
Piston rings are tough (or incommunicable) to get to without pulling the engine. You can learn a lot nearly what is going on with the valves, valve seals, and piston rings by doing a compression test. When done correct, this can help you tell if the piston rings are worn.
Compression Test: How To (PopularMechanics)
Decision
It tin can be tough trying to track down why you may accept blueish smoke from your exhaust. With a little patience, you can exercise information technology. If there is annihilation you'd like to add, please exit a comment beneath.
Source: https://www.700r4transmissionhq.com/blue-smoke-from-exhaust-causes/
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