Engine heats up while driving.coolant come out tail pipe

White smoke from tail pipe normally means you are burning coolant. Could be a blown head gasket. With car running, check for sweet smell from tail pipe, if you do, it's coolant burning. Also see if you have coolant running out of tail pipe. You can also remove spark plugs and see if they look clean or like new. Another indicator that coolant is making it's way into engine cylinders. Could only be going into one of all.

no
if the thermostat is not opening , the temp will go up until it hits the red and stay there
possible a blocked radiator core not passing enough coolant at rpm
check for transmission not moving to overdrive
run fault codes

That might be steam, check to see if you are loosing coolant if is loosing coolant but it doesn't leak onto the ground you could have a bad head gasket. It doesn't do it with the clutch in because there is no load on the engine.

What engine? Has thermostat been changed? You say it has not overheated since, but water not circulating. If water/coolant wasn't circulating, it would be overheating. Please explain a little more or confirm why you think that.

Check the following for black smoke from tail pipe:
- Fuel pump pressure, too low.
- Regulating valve.
- Fuel injectors.
- Element air cleaner.
- Mass air flow sensor.
- Engine coolant temperature sensor.
- Contaminated fuel.
- Heated Oxygen sensor.
- ECU.

One of the main causes of white exhaust smoke and coolant loss is a cracked or warped cylinder head, a cracked engine block, or head gasket failure caused by overheating. A cracked head may allow coolant to leak into one or more cylinders or into the combustion chamber of the engine. Dirty coolant, a poorly maintained cooling system, a low coolant level, or a non-functioning cooling fan can cause engine overheating. In addition, engine wear can eventually cause the gaskets to lose their capacity to seal properly allowing internal coolant loss. Intake manifold gasket and head gasket failures are two of the most common sources of internal coolant loss caused by engine wear.


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White smoke means water is getting into the engine from teh coolant system. Likely that your engine cylinder head has a crack, or head gasket is bad

if the smoke is white could be a headgasket

When the engine is cold, open the radiator cap and fill with coolant/water mix to top.
Run the engine with your heat on high fan, high heat, wait for the engine to cool again and fill the radiator again. You must get to the point where when you open the radiator cap when it is cold that the radiator is full to the top.
Gary

sounds like you got a head gasket or gasket ont he top of your engine giveing trouble
it will require you to change the upper engine gaskets