How to Troubleshoot a Master Clutch Cylinder
The master clutch cylinder in your vehicle controls the fluid that is pumped to the clutch in a hydraulic clutch system. It uses vacuum pressure to push the fluid through the clutch line. When the clutch cylinder fails, there are several common issues you can troubleshoot before going to a professional mechanic to have a new master cylinder installed.
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Instructions
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Check the clutch fluid level. Look at the outside of the master clutch cylinder reservoir tank. The tank location varies depending on the make and model of your vehicle but is normally located just to the left of the brake master cylinder which is normally mounted on the firewall in the back of the engine bay. On the outside of the tank, there will be two marks. The clutch fluid level needs to be between the upper and lower marks on the master clutch cylinder reservoir tank.
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2
Visually inspect the clutch master cylinder for any leaks or any fluid running down the side of the cylinder. Any leaking indicates a failed cylinder, which must be replaced.
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3
Press on the clutch pedal. If it feels spongy, there is air in the clutch lines that needs to be removed. To bleed the clutch lines, you will need to refer to your vehicle's service manual or take it to a shop.
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Inspect the steel clutch line for any damage. The clutch line runs from master clutch cylinder to the clutch slave cylinder. The clutch lines should be readily visible under the hood of most vehicles. Any corrosion or rust on the outside of the clutch line can indicate corrosion on the inside of the line. If your clutch line is corroded, fluid may not be able to flow freely through the system and you may need to replace it.
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