- Joined
- Sep 10, 2023
- Posts
- 981
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- 2,957
- Location
- KY
- First Name
- Bill
- Truck Year
- 1978
- Truck Model
- K20
- Engine Size
- 400
GM used different heater hose sizes (typically 5/8" in and 3/4" out) primarily
to optimize coolant flow and heat transfer through the heater core, ensuring maximum warmth by reducing flow restriction on the return side, preventing backpressure, and allowing efficient convection, especially important for effective cabin heating in colder weather. The larger hose helps the coolant exit the core more easily, preventing bottlenecks and maintaining good circulation for consistent heat.
to optimize coolant flow and heat transfer through the heater core, ensuring maximum warmth by reducing flow restriction on the return side, preventing backpressure, and allowing efficient convection, especially important for effective cabin heating in colder weather. The larger hose helps the coolant exit the core more easily, preventing bottlenecks and maintaining good circulation for consistent heat.
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