What causes a Duramax to smoke?
White smoke from an LB7 Duramax engine often indicates faulty injectors.
What causes white smoke in Duramax diesel?
White smoke coming from the exhaust usually points to one point of failure: the injectors. Usually, white smoke indicates that the diesel fuel is not burning correctly. Unburned diesel fuel will make its way through the exhaust completely unused. Be careful of white smoke as it will irritate your eyes and skin.
What causes black smoke on a Duramax?
Most common causes of black smoke from diesel engine include: Dirty air filter. Black smoke indicates that the fuel is not burned properly. The internal combustion process in diesel cars requires a certain mixture of fuel and air.
What does white smoke from a diesel engine mean?
WHITE SMOKE occurs when raw diesel comes through the exhaust completely intact and unburned. Some causes of this include. Faulty or damaged injectors. Incorrect injection timing (could be a worn timing gear or damaged crankshaft keyway).
How do you stop white smoke from a diesel engine?
White smoke on a cold start, and then it disappears as the engine warms up. This is very common. It will often happen at startup in cold weather with lower compression engines. As you start running the engine at idle (around 650 or 750 rpm), you will achieve a more effective compression ratio, and the smoke clears.
Why is my LB7 blowing white smoke?
Yep! It means that you are having injector probs. it is letting fuel in the motor. Another way to tell is if you let the oil drip off the dipstick on to a paper towel on there will be a ring of fuel around the oil drop.
Why is my lb7 blowing white smoke?
How do you fix black smoke from exhaust?
How To Get Rid Of Black Smoke From Exhaust Pipe?
- Clean Air System. The internal combustion process requires the correct amount of air intake to burn the fuel completely.
- Use Common -Rail Fuel Injection System.
- Use Fuel Additives.
- Get The Engine Rings Checked And Replaced If Damaged.
How do you fix a white smoke from a diesel engine?
If the white smoke comes with significant performance loss, consider having the engine undergo a pressure test to determine if it’s caused by a leak at the valve stem or piston. In such cases, the top half of the engine will be dismantled, and the damaged valve and/or piston rings removed and replaced.
How much does it cost to replace injectors on LB7?
How much does it cost to replace injectors on LB7? The total cost to have a mechanic replace 8 injectors on an LB7 Duramax can range from $4000 – $5000 CAD, depending on what other work is performed at the same time.
Can a blown turbo cause white smoke?
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.
When did the Chevy Duramax diesel engine come out?
The LB7 Duramax engine made its debut on Chevrolet and GMC HD trucks in 2001. These diesel engines are where the Duramax started, and they have been so successful that the Duramax are still used in GM HD trucks today.
Is it normal for a diesel engine to smoke a little?
A little black smoke is normal on a properly functioning diesel engine, but if the amount of smoke changes at different RPMs and loads you have an issue. Here are the things it could be and then we will go into what to look for and steps to diagnose the problem…
What causes crankshaft breaks in Duramax trucks?
High horsepower Duramax trucks of all generations are susceptible to snapping a crankshaft. Excessively high RPMs and poor tuning have attributed to some crankshaft failures. Some people also blame the firing order for putting additional stress on the crankshaft. Breaks typically occur near the number one and two rod journals.
Is it acceptable for a diesel engine to burn too much oil?
However, it is not acceptable for any engine to burn large amounts of lubricating oil. A great thing to do as a preventive for your diesel engine is an oil and fuel additive. Check out This stuff (link to amazon) it is the best in my opinion.