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Blue Smoke

Crazyleggs
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Crazyleggs Enthusiast

Crazyleggs

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Posted

Hey guy, did a recent oil change on my 2919, shortly afterwards I started seeing blue puffs of smoke usually at hyw speed.

This only happens periodically, have taken to dealer, they scanned and test drove, saw no issues. Anyone have this experience?

Adamace1 Enthusiast

Adamace1

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Posted (edited)

Is there oil loss between oil changes. How many miles are on the motor. What motor is it? But I'm going to say it's not normal. Would think you would start seeing some oil loss.

Edited by Adamace1
Gangly Senior Enthusiast

Gangly

Posted
Posted

Blue smoke will generally be oil consumption.  Check your engine oil level to verify proper oil level and make sure to add some if its too low as a result of the oil consumption. 

 

There are multiple ways engine oil is consumed, the following three are what I have most often scene:

 

PCV system is allowing oil to be cycled back into the combustion process through the intake.

Valve guides are leaking allowing oil to be sucked into the combustion chamber.

Piston rings are improperly sealed or defective allowing for oil to gain entry into the combustion chamber.

 

Being a relatively new engine, I doubt that you have bad rings or valve guides so I would suggest checking your PCV system for oil in the hose.  If you find oil present, I would highly suggest the installation of a catch can and be done with it.

 

Crazyleggs Enthusiast

Crazyleggs

Posted
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Posted
On 3/28/2021 at 9:07 AM, Adamace1 said:

Is there oil loss between oil changes. How many miles are on the motor. What motor is it? But I'm going to say it's not normal. Would think you would start seeing some oil loss.

Haven't seen any noticeable oil loss, it's a 5.3

Crazyleggs Enthusiast

Crazyleggs

Posted
  • Author
Posted
On 3/30/2021 at 12:58 PM, Gangly said:

Blue smoke will generally be oil consumption.  Check your engine oil level to verify proper oil level and make sure to add some if its too low as a result of the oil consumption. 

 

There are multiple ways engine oil is consumed, the following three are what I have most often scene:

 

PCV system is allowing oil to be cycled back into the combustion process through the intake.

Valve guides are leaking allowing oil to be sucked into the combustion chamber.

Piston rings are improperly sealed or defective allowing for oil to gain entry into the combustion chamber.

 

Being a relatively new engine, I doubt that you have bad rings or valve guides so I would suggest checking your PCV system for oil in the hose.  If you find oil present, I would highly suggest the installation of a catch can and be done with it.

 

Thanks for the information, you'd think the service tech would have thought of that, but he only scanned it, looked for visible leaks and a drive around town. Of course no blue smoke puffs, I'll relay this next week when I visit before my warranty runs out.

  • 2 weeks later...
Adamace1 Enthusiast

Adamace1

Posted
Posted
8 hours ago, Duramax3oh said:

It’s likely a surprise gender reveal set up by your spouse. Congrats and Godspeed. 😁

LoL.

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