When adding or replacing the clutch fluid, always use a top quality brake fluid, such as Delco Supreme II or DOT-3. DO NOT allow the clutch fluid container or cylinder reservoir to remain open for long periods of time; brake fluid absorbs moisture from the air, reducing its effectiveness and causing corrosion in the lines. Isuzu recommends that silicone brake should not be used in the clutch system. Damage to the rubber parts may result.
Any sudden decrease in the clutch system fluid level indicates a possible leak in the system and should be inspected immediately.
The clutch master cylinder, located in the left rear section of the engine compartment near the brake master cylinder, consists of an aluminum body and a translucent nylon reservoir with minimum and maximum fill indicators. The fluid level of the reservoirs should be kept near the top of the MAX marks.
If fluid must be added, twist the reservoir cap off. (It screws on.) Add the fluid and wipe any dripping fluid from the reservoir or engine component; remember, brake fluid will eat through paint. Screw the cap back on the reservoir until snug.
Be careful not to spill any brake fluid on painted surfaces; it will eat the vehicle's paint.