Heater Unit/Core Replacement - Honda 2004 Odyssey Service Manual

Heating/Air Conditioning

Heater Unit/Core Replacement

SRS components are located in this area. Review the
SRS component locations, '99-01 models (see page 23-
18), '02 model (see page 23-19), '03-04 models (see
page 23-20), and the precautions and procedures (see
page 23-21) before performing repairs or service.
1. Make sure you have the anti-theft code for the radio
and the navigation system, then write down the
frequencies for the radio's preset buttons.
2. Disconnect the negative cable from the battery.
3. From under the hood, open the cable clamp (A),
then disconnect the heater valve cable (B) from the
heater valve arm (C). Turn the heater valve arm to
the fully opened position as shown.
B
C
4. When the engine is cool, drain the engine coolant
from the radiator (see page 10-13).
21-46
5. Slide the hose clamps (A) back, then disconnect the
inlet heater hose (B) and the outlet heater hose (C)
from the heater unit. Engine coolant will run out
when the hoses are disconnected; drain it into a
clean drip pan. Be sure not to let coolant spill on
the electrical parts or the painted surfaces. If any
coolant spills, rinse it off immediately.
A
A
6. Remove the mounting nut from the heater unit.
Take care not to damage or bend the fuel lines and
the brake lines, etc.
C
B
8 x 1.25 mm
13 N·m (1.3 kgf·m, 9.4 lbf·ft)