Heater Pipe and Hose Component Installation Note

WARNING: This page is about a different car, the 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Insert the heater pipe into the heater hose until the hose reaches the bracket or the protrusion on the pipe.
When the rear heater pipe is removed, bleed the air from the rear heater pipe thoroughly after refilling the engine coolant to prevent air from being trapped in the rear heater pipe.

Fig 1: Proper Heater Pipe & Hose Component Assembly
Courtesy of MAZDA MOTORS CORP.
Install the rear heater pipe and rear cooler pipe securely as shown.

Fig 2: Installing Rear Heater Pipe
Courtesy of MAZDA MOTORS CORP.