The intake manifold is a part of the engine that directs the air and fuel mixture into the cylinders. It is usually located at the top of the engine and is connected to the cylinder head. Antifreeze, also known as coolant, circulates through the engine block and cylinder head to regulate the engine's temperature.
If there was a leak in the intake manifold, it would most likely cause coolant to leak into the engine cylinders, which would then mix with the engine oil. This can lead to several issues, including engine damage.
However, it is possible to have a coolant leak from the intake manifold without it mixing with the engine oil if the leak is small and the coolant is evaporating before it can reach the oil pan. In this case, you might only notice a slight loss of coolant over time, and you may see or smell coolant near the intake manifold.
