How to Replace a Master Clutch Cylinder in a 1998 Volkswagen Passat

Written by cayden conor
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The master cylinder in the 1998 Volkswagen Passat works in conjunction with the slave cylinder to provide pressurised brake fluid to work the clutch. Depending on the model Passat, the master cylinder may have its own reservoir. On some models, the clutch master might share a reservoir with the brake master cylinder. Auto Zone recommends changing the slave cylinder at the same time you change the master cylinder. When master fails, the slave cylinder will fail shortly thereafter.

Skill level:
Moderately Challenging

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Things you need

  • Set of sockets
  • Set of wrenches
  • Siphon
  • Drain pan
  • Torque wrench

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  1. 1

    Remove the trim panel or carpet on the driver's side cabin. Disconnect the push rod where it is attached to the clutch pedal.

  2. 2

    Unscrew and remove the cap on the reservoir. If the reservoir is equipped with a float container, remove the float container, using the appropriate wrench. Remove the screen by pulling it out and siphon enough brake fluid out of the master cylinder to drop the level below the filler pipe connection.

  3. 3

    Detach the supply hose from the master cylinder reservoir and plug. Remove the lower instrument panel trim by carefully pulling it off. If the trim does not have plastic inserts holding it on, which depends on the model Passat, remove the bolts from under the dash, using the appropriate socket. The master cylinder actuating rod attaches to the pedal mechanism. Detach the rod from the pedal mechanism.

  4. 4

    Remove the supply hose from the master cylinder and allow the fluid in the master cylinder to drain into a drain pan. Plug the hose with the appropriate size bolt. Disconnect the line to the slave cylinder. Unbolt and remove the retaining bolts holding the master cylinder on the firewall. Pull the master off the firewall.

  5. 5

    Install the new master cylinder, making sure the bushings don't get displaced. Tighten the retaining bolts to 6.5 foot-pounds of torque. Reattach the fluid connections and tighten all to 12 foot-pounds of torque. Fill the master cylinder with brake fluid. Bleed the system.

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