Vehicle running hot when driving in congested traffic

have the variable vanes in the turbo checked for correct operation
there is an actuator that is vacuum
electrical sensor controlled and the vanes may be sticking at slow engine operations as on traffic
the smoke color indicates incorrect air/fuel ratio and the turbo is a point to investigate

check your hoses and make sure its not getting low because when it gets low the hoses can get hot enough to expand and spit out antifreeze without overheating

sounds like clutch fan bad, just replace the clutch and reuse fan blade

The fan is only supposed to come on when there is excess heat .. in normal driving conditions it doesn't start. When you start your car in the morning the fan won't come on because the engine is cold.

With a hot engine - and it depends how hot the engine is - the fan will only kick in to prevent overheating. In heavy slow moving traffic or a traffic jam, the fan will kick in if needed.

The air flow through the radiator is usually sufficient -in normal driving conditions - to cool the engine.

When you park up and the car has a hot engine, the fan will kick in. This is perfectly normal. It is caused by a surge of hot coolant triggering the fan sensor. Perfectly normal.

The fan then should cut out after a while .. maybe 2-3 minutes at the most. If the fan runs continuously that suggests a fault in the temperature sensor switch.

Next time - wait by the car and see how long it takes for the fan to quit after you have parked up. It should stop of its own accord after a couple of minutes.

If the fan cuts off after a short while, and your battery is becoming drained, that's probably a battery or alternator fault.

Remember: when you start the car the fan won't kick in at idle speed because the engine is COLD, and there is no reason for the fan to start up ..
The fan WILL kick in for a couple of minutes after you have parked the vehicle and the engine is hot

The fan is known as a traffic fan because it usually goes on in heavy traffic. However, it should go on whenever it gets sufficiently hot.
If you have a temperature gauge on your car the needle shouldn't go more than 1/2 way up, or the temperature gauge if digital should not go above 220 or 230 deg. F (in GM cars) during even hot day operation.

If it goes to 260 deg. F or above, you have a problem.

If the fan does not go on with the a/c then you may have a relay or electrical wiring break that prevents it from going on when needed.

check to see if the cooling fans are turning on

check the electric fans and relays.

Sounds like an electrical issue maybe the plug from firewall to cab is loose or on computer is loose, sometimes those coonections or pins get loose,i had a new car with 200 miles on it and it went dead in heavy traffic,had to get towed to dealer they found loose connection!!!!With audible noise when happens tells me its wiring,check all connections and wires to connections make sure there not loose!!!Best of Luck to you!!!!!

does it run hot while driving or in traffic?
if running hot at idle could be water pump not circulating enough try revving engine some and see if temp comes down. also check your fan clutch.
if running hot going down road probably radiator