Leak or blown gasket.
Under the intake manifold. where is the intake manifold!
underneath the intake manifold next to the oil filter
The EVAP purge solenoid on a 2001 Nissan Sentra GXE is under the hood. It is mounted to the top of the intake manifold.
The coolant drain plug on a Nissan Micra engine block is on the upper part of the block. It is under the intake manifold.
PCV VALVE - Under hood, center, upper engine area, mounted in intake manifold
Coolant temp sensors are typically somewhere on the intake or on the cylinder heads. They have no more than 2 wires going to them, most of the time only one.
On intake manifold.
you have a coolant leak
The engine coolant temperature sensor and coolant temperature gauge sender are located on the passenger's side of the engine, under the intake manifold.
Intake manifold at top of engine?
Need to check the 4 corners on the intake manifold. It is common for the intake to leak engine coolant.
Under the intake manifold, u need to completely remove your intake manifold to Access it..