Do you have to remove the top half of the intake to change the heather line in the back of the intack?

Yes, to change the heater line in the back of the intake on most vehicles, you typically need to remove the top half of the intake manifold. This is because the heater line is often located in a position that is obstructed by the intake manifold. Removing the top half allows for better access to the heater line for replacement or repair. Always consult your vehicle's service manual for specific instructions related to your model.