If your car is basically stock and has not been tampered with, the heater hose hookup is pretty straightforward. There is a pipe that runs along the right side of the engine from the water pump to the rear of the block under the intake/exhaust manifold. There is another short pipe that exits the rear of the cylinder head. Hoses from each of these pipes connects to the heater control valve and the heater core itself on the firewall. You should acquire a maintenance manual, Haynes is a good one, or a photo of a properly configured 122 to assist you.

Answer by Arthur O on May 16, 2007