Slipping fan belt. Blade missing off fan(engine should be idling or running very roughly). Fan fitted in reverse(rare but can happen). Timing too far advanced(possible). Water pump failing(I'd guess as it being the one. Stop engine, take keys out of ignition. Grab top and bottom of fan. Rock top to you and bottom away a couple of times. If it wobbles/feels loose, change water pump). No antifreeze/antiboil in radiator,or incorrect ratio of water to coolant-the above mentioned green stuff. All of the above.
Check the fan control
you are flooding the engine
bad/partially blocked catalytic converter. - kind of a rotton egg smell, right?
If overheating while moving it could be brakes dragging or emergency brake on or bad bearings in wheel. If overheats when idling could be bad timing, seized alternator or idler pulley bearings.
There are many reasons why your car might vibrate while it is idling. It could be running too hard for example.
Hey I think it's your water pump from my experience the water pump in the Passat are made from plastic and over time can break down resulting in overheating at high engine speeds.. a new aftermarket water pump is available with improved metal parts these cost the same and I am 80% sure this will resolve your problem.
Cooling fan may not be working as it should. If it is not coming on either the fan is defective, fuse is blown, or the thermal sensor is bad. If it is running and the engine is still overheating the radiator may be partially clogged.
Effectively all the fuel that it burns while idling. You are getting 0 miles per gallon while idling.
The fan should turn on whenever the engine temperature reaches a certain point. If the fan does NOT come on, the cooling system is not able to dissipate the excess heat. Yes, it can cause the engine to overheat.
Check the thermostat and replace if you have more than 30,000 miles on it They sometimes stick partially closed and cause overheating. A second cause may be a clogged or undersized radiator. You can have a radiator shop clean it or better yet, have them build a new radiator but add an extra row of coils to add extra cooling.
There are several things that can cause your Jeep to stall while idling. The timing may be off or your fuel filter may be clogged.
Check the cars ignition coil and crank sensor. Either of these could be overheating and causing the car to not start until it sits for a while.