Smoke exhaust V6 camaro

[Shotaro]

The white smoke from the 2013 camaro v6 exhaust is terrible. The error code is p0300, but I also replaced the o2 sensor once.
Is it possible for the stem seal to fail due to oil rising or oil falling? Oil change is managed. The oil is also clean.
The mileage is 50,000 miles.

[2013ZL1FUN]

White smoke as a rule indicates coolant in exhaust. Not good! Possible cracked heads or blown head gaskets. You can buy a test kit that tests for carbon monoxide in the coolant. Do not drive this vehicle. Seek help of a mechanic familiar with this vehicles. Good luck.

[meldron]

It could also be oil also. What's the smell? If it is somewhat sweet, it's the coolant.

[larry_g]

Does it have a catch can? It could be full.


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[AlanRubin]

You're burning coolant or oil in the engine. The P0300 is random misfire, which is being
caused by the leak into the chamber(s). As said, it can be oil, since synthetic burns
differently than conventional oil, which would be blue'ish. Synthetic oil burns gray'ish
to white'ish. There is a You-Tube video that shows a guy torching motor oil, and the
synthetics are much lighter in color when they burn.

Bad valve stem seals will cause oil to leak into the effected cylinders. When sitting,
that oil pools in the chambers, and burns on start-up, but usually goes away once
it has all burned off, and seeps in when running, and cakes on the back of the
valves.

IF you can sit idle, and that smoke comes out all the way to operating temperature
and keeps on going, then you have a serious leak. You can smell coolant, it smells
like it does in the container. Take a whiff of that smoke, and you will know if it is
coolant.

[PaulsSS]

Stuck leaky injectors

[G8One2]

White smoke = coolant
Black Smoke = too much fuel
Blue smoke = oil

That most definitely looks like you're burning coolant. Not good

[Vegas Bound]

Nihon no doko ni?

[AlanRubin]

Originally Posted by G8One2

White smoke = coolant
Black Smoke = too much fuel
Blue smoke = oil

That most definitely looks like you're burning coolant. Not good

Synthetic oil does not burn BLUE like DINO oil does. It's more grey than blue.
Some may say blue tinge, but it's not a obvious blue like with DINO oil.

[Ahyro]

Mines smokes like crazy as well. Just out of the blue it started smoking real bad on startup then goes away. Smells like real nasty oil and carbon. Took it in to shop to ha ethem run the carbon burning stuff through it. Changed oil which was nasty after that. Still smoked on startup. Put a catch can on to see if it would catch anything and that fills up in about 20 miles. Do the heads get full of carbon to the point the oil doesn't drain back down so it gets sucked up through pvc port and dumped back in intake? Bought it used and no idea what the history is on it as it was a bank repo. Runs excellent no dash lights it did have a timing chain code but they cleared it and hasn't come back. Anyone else ha eanything similar happen?

[2013ZL1FUN]

As I previously stated, get a test kit and test coolant for carbon monoxide. I believe it will test positive, then all you will need to do is figure out if it is gaskets and or cracked heads.

[AlanRubin]

Originally Posted by Ahyro

Mines smokes like crazy as well. Just out of the blue it started smoking real bad on startup then goes away. Smells like real nasty oil and carbon. Took it in to shop to ha ethem run the carbon burning stuff through it. Changed oil which was nasty after that. Still smoked on startup. Put a catch can on to see if it would catch anything and that fills up in about 20 miles. Do the heads get full of carbon to the point the oil doesn't drain back down so it gets sucked up through pvc port and dumped back in intake? Bought it used and no idea what the history is on it as it was a bank repo. Runs excellent no dash lights it did have a timing chain code but they cleared it and hasn't come back. Anyone else ha eanything similar happen?

If you're getting that much oil within 20 miles, you have a pretty serious issue.

That is way too much blow-by. I run 1200 miles a week, and maybe get half
filled. Depends on the oil I use too. If I use DEL0400 Synthetic, that is reduced
by 50%. I don't know why, but I checked it with many different types and
grades of oil, and the DELO400 has the least blow-by, and the least amount
in the catch after the 1200+ miles. I have 204,000+ miles on this LLT engine too.

There is a new valve cover gasket that fixes that, for the passenger side.

You could have bad oil rings for that kind of blow-by.

[Ahyro]

Thinking of doing a compression test on it and see what it says. What is compression on these motors? Wouldn't low cylinder pressure show up on a scan tool? Is there a vent some where maybe that's plugged so there is to much crank case pressure causing it to blow so much oil? I know the elbow going into top of intake was about full off tarry stuff?

[ElderJ]

Originally Posted by AlanRubin

If you're getting that much oil within 20 miles, you have a pretty serious issue.

Yep, that's insane. I check my catch can every few hundred miles out of sheer boredom, and I find maybe a tablespoon or two of fluid in there?


Either that or he has a a REALLY small catch can...