On a 93 Isuzu Rodeo Which Heater hose do you install flush tee into Top or Bottom?

On a 1993 Isuzu Rodeo, you generally install a flush tee into the bottom heater hose. This is because the tee is usually used for adding an auxiliary coolant fitting (like for a block heater or coolant temp sensor), and the bottom hose is typically lower in the system and allows for better draining and easier air bleeding.

However, always consult a repair manual specific to your 1993 Isuzu Rodeo. The exact location might vary slightly depending on the engine and specific routing of the heater hoses. A diagram in the manual will show you the correct placement. Improper installation can lead to poor heater performance or even damage to the cooling system.