Overheated, exhaust leak, oil leak on manifold-hard to speculate
A vacuum leak could cause that.
It could.It could.
A vacuum leak is one possibility.
Overheating can damage any seal.
The coolant leak is pretty cut and dry - you have a leak somewhere. The lukewarm heat (assuming you're referring to the car's heater) could be for a number of reasons. Insufficient coolant could be one of those. Your coolant could be burnt out. It could be a problem with one of your heater hoses. You could have a worn out heater core.
it could of been a short in the wiring in the engine compartment or you had a fuel leak and it got into wires or the ignition system
If the leak is by the passenger floor-- could be the heater core check to see if this leak is engine coolant or just water. Could be a leaking windshield seal could be a door seal could be evaporator line is plugged
This engine could have burnt rings in it. There also could be an old leak which is running down on the manifold which would cause the engine to smoke.
Cooling system leak or engine overheating and steam escaping from the radiator cap.Cooling system leak or engine overheating and steam escaping from the radiator cap.
Hopefully, it's the thermostat... but, if the engine has seriously overheated it could be a damaged head gasket caused by a warped head. Engine heads will warp slightly when the engine overheats, then there is insufficient pressure on the head gasket and the gasket will leak.
Engine temperature sensor? Vacuum leak?