Check oil and coolant levels. Also make sure both of them are not contaminated with the other. If your consuming either, your levels will eventually lower to a noticeable level, but it may take periodic checking.

 

Just wanted to see if I have a serious problem...will check both fluids. Tks

 

If you’re consuming oil or coolant, you do. But if it’s the coolant, there’s a good chance it may be under warranty, due to the 2012 head issues.

Or, it simply could be extra fuel on cold start, or moisture being pushed out exhaust, it’s hard to say without seeing person.

 

Does it only do this after setting over night or all day . Could be Valve seal .

 

Carefully monitor oil levels (dropping oil levels would suggest oil consumption, or a leak). While you are at it, look for any whitish or rusty deposits on the dipstick or on the underside of the oil fill cap- whitish deposits would suggest coolant getting into the oil somewhere.

No regular oil loss, clean looking oil with no deposits in that oil means a relatively healthy engine, which equals less to worry about.

 

My 2011 Grand Cherokee did that but only after sitting for several days. It was driven daily and normally no probs. Didn't notice any oil consumption between changes. I can't remember if it was 3.8 or 3.6. 3.8 I think.

 

Coolant will normally give a whitish smoke according to many posts on the forum. Oil is well known for blue smelly smoke.

A few puffs or only a short amount of smoke will probably not be detectable in loss on the dip stick, until you put a lot of miles on it since the last change.

 

All fluid levels OK....Just a puff of Blue Smoke on start up now & them.

 

It may be a small leak-by with one of your piston rings if it does not smoke other than what you described.

 

As BANGER said, could be valve seals. Shut the engine down and the remaining oil that has been splashing around inside the valve cover sits in the low spots. Over time the bad seal(s) allows seepage into the cylinder(s) and at startup is quickly burned away. Generally if it smokes at startup "valve stem seals" or if it smokes when revving "piston rings".

 

valve seals/guides.
I would not worry unless it gets bad