What does blue smoke on cold start mean?

Blue smoke means oil has mixed with your gas in the combustion cycle, and that oil is being burned up and sent out your exhaust pipe with the rest of the partially burned fuel.

How do I get my Duramax to smoke more?

How to Make a Stock Duramax Blow Smoke

  1. Reduce your diesel truck’s air intake by partially obstructing the air intake with cloth or another object. This is the easiest but potentially the most harmful way to make a stock Duramax blow smoke.
  2. Neglect your truck.
  3. Accelerate quickly.
  4. Modify your truck.

Is blue smoke normal on diesel cold start?

Blue smoke should not be ignored but is common when starting an engine in a cold weather. The oil thins out when it is cold and some could escape into the cylinder and be burnt. Cold temperatures can cause older more worn rings to unseat just a bit due to deposits found around the rings or cylinders.

How do I fix blue smoke at startup?

How to Fix Blue Smoke from Exhaust

  1. Remove Excess Oil. The simplest fix is to remove some oil from the system.
  2. Clean Engine. If the engine hasn’t been cleaned in a while, it’s time to take a look at it.
  3. Replace Piston Rings.
  4. Fix Turbocharger.
  5. Replace PCV Valve.
  6. Repair Valve Seals.

How cold does it have to be to plug in a Duramax diesel?

I plug mine in as soon as its below freezing. roger24 said: Certain years of trucks will throw codes at start up if they are plugged in for long periods of time if the ambient air temp is in the 20-30 degree range.

Can you roll coal with Def?

No matter how modified a gasoline engine is, it isn’t going to work. The smoke is the result of unburned fuel particles, and only diesel will do. Gasoline isn’t dark or thick or offensive enough. But not just any diesel truck can roll coal.

What would cause a Duramax to lose prime?

With age as well as the use of ULSD and bio-diesel fuels, the O-rings in the filter head assembly can begin to allow air to bleed into the system, causing the fuel system to lose its prime. If this is the case for you, it might be time for a fuel fix.