Heater Core Case: Service and Repair

Air Conditioning Unit:

REMOVAL

1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM

HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrigerant.

Specified amount: 430 ± 30 g (15.17 ± 1.06 oz.)

2. DRAIN ENGINE COOLANT FROM RADIATOR

HINT: It is not necessary to drain out all coolant.

3. DISCONNECT LIQUID TUBE AND SUCTION HOSE




a. Using SST, remove the 2 piping clamps.
SST 09870-00015 (Suction tube)
09870-00025 (Liquid tube)




1. Insert SST to piping clamp.

HINT: Confirm the direction of the piping clamp claw and SST using the illustration showing on the caution label.




2. Push down SST and release the clamp lock.

NOTE: Be careful not to deform the tubes, when pushing SST.

3. Pull SST slightly and push the release lever, then remove the piping clamp with SST.
4. Remove the piping clamp from SST.

b. Disconnect the both tubes.






NOTE:
- Do not use tools like screwdriver to remove the tube.
- Cap the open fittings immediately to keep moisture or dirt out of the system.

4. REMOVE INSTRUMENT PANEL AND REINFORCEMENT




5. DISCONNECT WATER HOSES FROM HEATER RADIATOR PIPES
a. Using pliers, grip the claw of the hose clip and slide the hose clip along the hose.
b. Disconnect the heater hoses.






HINT:
At the time of installation, please refer to the following item.
Push the water hose onto the heater radiator pipe as far as second ridge on the pipe and install the hose clip.

6. REMOVE BLOWER UNIT




7. REMOVE A/C UNIT
a. Disconnect the connectors.
b. Remove the 2 nuts and A/C unit.

INSTALLATION

Installation is in the reverse order of removal.
HOWEVER, NOTE THAT THE FOLLOWING PROCEDURES SHOULD BE SURELY CONDUCTED

a. Remove the joint of the heater outlet hose from the heater pipe.

HINT: Do not detach the other joint on the engine side.




b. Hold the removed heater hose with the end facing up, pour LLC into the hose.
c. Pour LLC until it flows into the reverse tank from the hose at the bottom.
d. When this happens, stop pouring and reinstall the heater hose to the heater pipe.
e. Perform air bleeding in the same manner when LLC is replaced.

HINT:
Note that the amount of LLC removed from the heater parts should be added.
Additional amount (example):
Heater core: approx. 350 cc
Heater pipe: approx. 200 cc
Heater hose: approx. 70 cc