White smoke from engine bay

[VA-Mack]

I’m getting white smoke from this (pics attached)
area of my engine. It’s the same area as the recall for the turbo oil line recall which had done last year. I took it to the Dealer said they see no issues with the recall repair and claimed oil was spilled on my last oil change (last week). They “cleaned” my engine bay free of charge and said there’s no more smoke. I drive home and of course there’s still smoke. Any idea what it could be? Blown head gasket? Or something as simple as a line leak?

I took pictures from the area of smoke and it seems to me that something may have cracked (sorry I’m no mechanic) but pictures are attached.

 

[VA-Mack]

2018 GT1/ 120k miles

Also just had coolant flushed

 

[Ohiocruiser]

Burning coolant and oil have very different smell. Which one is it?

 

[VA-Mack]

Burning coolant and oil have very different smell. Which one is it

It’s definitely not a sweet smell like I’ve read coolant smells like. So id guess its the oil

 

[Thomby]

It’s definitely not a sweet smell like I’ve read coolant smells like. So id guess its the oil

The area you have circled looks like the precat (O2 sensor is just to the right). The problem is that this is under/behind the turbo, which has both oil and coolant. Coolant is generally white & sweet smelling, while oil is typically more blue.

A blown head gasket would tend to throw white smoke out the exhaust (so would an oil leak from the turbo seals, piston rings, or valve stems, the exhaust would just look more blue). Engine bay smoke suggests a leak or spill dripping onto the exhaust. Does it seem like a steady supply, or just whisps from a residual spill?

Our engine bays are busy enough that it would be hard to fully clean up a spill, so you could get underneath and look for any signs, or just drive it a while and see if it tapers off.