It is external.

HYDRAULIC LINKAGE
The clutch master cylinder, slave cylinder and connecting line are serviced as an assembly only. The linkage components cannot be overhauled or serviced separately. The cylinders and connecting line are sealed units. Also note that removal/installation procedures for right and left hand drive models are basically the same. Only master cylinder location is different.

REMOVAL

1. Raise vehicle.
2. Remove fasteners attaching slave cylinder to clutch housing.

Fig. 7

1. Remove slave cylinder from clutch housing.
2. Disengage clutch fluid line from body clips.
3. Lower vehicle.
4. Verify that cap on clutch master cylinder reservoir is tight. This is necessary to avoid spilling fluid during removal.

Fig. 8

1. Remove clutch master cylinder attaching nuts.
2. Disengage captured bushing on clutch master cylinder actuator from pivot pin on pedal arm.
3. Slide actuator off pivot pin.
4. Disconnect clutch interlock safety switch wires.
5. Remove clutch hydraulic linkage through engine compartment.

INSTALLATION

1. Be sure reservoir cover on clutch master cylinder is tight to avoid spills.
2. Position clutch linkage components in vehicle. Work connecting line and slave cylinder downward past engine and adjacent to clutch housing.
3. Position clutch master cylinder on dash panel.
4. Attach clutch master cylinder actuator to pivot pin on clutch pedal.
5. Install and tighten clutch master cylinder attaching nuts to 38 Nm (28 ft. lbs.) torque.
6. Raise vehicle.
7. Insert slave cylinder push rod through clutch housing opening and into release lever. Be sure cap on end of rod is securely engaged in lever. Check this before installing cylinder attaching nuts.
8. Install and tighten slave cylinder attaching nuts to 23 Nm (17 ft. lbs.) torque.
9. Secure clutch fluid line in body and transmission clips.
10. Lower vehicle.
11. Connect clutch interlock safety switch wires.