White smoke/steam coming from the hood on drivers side...no recent oil change...car not running hot...happens when car is shut off not while driving...had recent work done on left front...replaced the hub bearing...this is when the smoking started...what could be a possible problem?..

check for a leaking hose to the heater core
the smell could be coolant and steam

old post
smoke or steam.?
smoke lingers long, steam goes away fast
steam smells like antifreeze, sweet and nasty
smoke smells like, well, oil burning,

take eng. dip stick drip one drop of oil on a hot manifold
smell smoke, now.

Possible spilt oil on exhaust manifold. Open hood, check oil level , make sure its full and take vehicle back to where you had the oil change done and have them recheck everything to make sure all is tight . And ask them to please clean any mess or spill they may have caused.

There is either A).an oil leak or B). the smoke is from residue oil spilled on exhaust and such during the repair. Crank the engine and look everywhere for an evident oil leak if one is not found leave it run till it gets hot enough to show where the white smoke is coming from and see then if it is residue or a new leak. Remember to rate my answer and leave testimony this is how we earn our milestones here of FixYa remember we are all volunteers here so answers may not come as fast as you like please be patient thanks in advance.

Smoking where.? tail pipe end.?
over heats, when, moving at 60mph
or only stopped.?
if that smoke is during a hot running motor, and is steam
the head gasket blew (or worse)
oil smoke burnt lingers a long time, steam goes away fast like tea pot.
smoke smells like burned oil, steam smells disgusting sweet due to
the coolant is 1/2 Glycol.
over heating has many reasons.
only stopped?, bad rad, bad pump, bad stat, bad fan clutch.(or elect fan)
fails to over heat moving, usually is bad fan (action)
steam at tail is coolant burning.

You don't mention what that smell is reminiscent of?

You don't mention the colour of the "smoke" and you didn't say whether the engine is petrol or diesel?

You don't mention whether the road behaviour/performance is normal?

White smoke is almost always steam or in the case of a diesel it could be an unburned fuel mist, grey/black is excess fuel and blue or grey/blue is burning oil.

Some steam is fairly normal until the engine and exhaust system is hot but excessive amounts could be one symptom of head gasket trouble. If the engine is drinking coolant and sending it through the exhaust as steam it will sometimes smell spicy.

Burning oil smells a bit like burned eggs in the frying pan.

If the car hasn't ultra-low sulphur oil and fuel the catalytic converter will convert sulphur traces into hydrogen sulphide - the bad egg gas...

Interesting.
White smoke is usually burning coolant.
You should be loosing a fluid, something has to be burning to make the smoke.
It could be a very slight drip onto the hot exhaust manifold or pipe if it is only happening from under the hood.

The white smoke is probably steam caused by coolant getting into the cylinder(s) either from a faulty head gasket, cracked cylinder head or cracked engine block. The loss of heat from the heater indicated that coolant was being lost..

So does the a/c still work, maybe your compressor is bad? Top off your oil and run the engine and see if you can find out where the oil came from?

Something is wrong. What does the steam smell like? Oil or antifreeze?
Look closely for coolant seeping onto something hot and vaporizing, if that's what you smell.
Check your coolant level and oil to verify if you may have a leak.