A radiator filler neck is a cap-opening fitted in the middle of the upper radiator hose fitting and the fitting on the engine. It permits topping off the cooling system with coolant by taking out the cap. It comes with a pressure cap and is held with hose clamps. Overheating is a common problem! With the big aluminum radiator, things work well. But, there is a possibility of an air bubble in the system. The radiator hose is at the top of the radiator filler cap. Hence, when a bubble is at the top of the radiator hose, one is unable to see it. The Inline radiator filler necks are tight fittings that join an inline radiator cap into the upper radiator hose. This helps to reposition the cap to the highest point of the cooling system, thereby, letting to fill the coolant up enough that can remove the likelihood of air bubbles in the cooling system.
Also, many times, there is a probability where the upper radiator hose has a bigger filler neck on the engine than on the aluminum radiator. But, if the inner diameter is less, one can get the perfect fit. Installing Filler Caps and Filler Necks is another critical step. Below mentioned are the steps of installation:¡
Reach out to the highest point on the upper radiator pipe.