How do change heater hoses on 280zx 1979?

To change the heater hoses on a 1979 Datsun 280ZX, start by ensuring the engine is cool and disconnect the battery. Locate the heater hoses connected to the heater core and engine; use pliers to loosen the hose clamps, then remove the old hoses. Install the new hoses by sliding them onto the fittings and securing them with clamps. Finally, refill the coolant, check for leaks, and reconnect the battery.