Parts for your 1991 Nissan Primera-Cluth slave cylinder

1991 Nissan Primera cluth-slave-cylinder — what it does and how to look after it

Yes, the 1991 Nissan Primera (P10) with a manual gearbox uses a hydraulic cluth-slave-cylinder. This is documented in the Nissan Primera P10 Factory Service Manual (CL section: Hydraulic clutch system diagrams and service), the Nissan FAST parts catalogue (Group 30620 “clutch operating cylinder"), and the Haynes Service & Repair Manual for Nissan Primera 1990–1999. Those technical sources show a master cylinder at the pedal, a hydraulic line, and a slave cylinder bolted to the gearbox bellhousing operating the release fork.

On the 1991 Primera, the cluth-slave-cylinder converts hydraulic pressure from the master into mechanical push at the clutch fork, so the driver gets a light, consistent pedal and clean gear engagement. It’s a simple bit of kit, but it cops heat and grime at the gearbox, so a little care goes a long way.

Signs this cluth-slave-cylinder needs attention include:

• Wetness or dust caking around the cylinder or rubber boot from fluid seepage
• Spongy or sinking pedal, inconsistent bite point, hard shifting or grinding into gears
• Brake/clutch fluid level dropping in the reservoir under the bonnet

As part of regular servicing, it’s smart to refresh the clutch hydraulic fluid every 2 years or around 40,000 kilometres. Use quality DOT 3 or DOT 4 brake fluid (as specified by Nissan), bleed at the slave nipple with a ring spanner and clear hose, and keep the reservoir topped to avoid drawing in air. While you’re there, inspect the rubber dust boot on the cluth-slave-cylinder and the flexible hose for cracks, and check the line unions for weeping.

If replacement’s on the cards, it’s a straightforward driveway job for a confident home mechanic:

• Safely raise the front, chock the wheels, and support on stands
• Crack the hydraulic line with a flare-nut spanner, remove the two mounting bolts, and swap the unit
• Fit new copper washers if applicable, nip the bolts to the factory spec from the FSM, then bleed thoroughly

Choose a reputable OEM or quality aftermarket cluth-slave-cylinder that matches the P10’s specs. If a fresh slave doesn’t sort a soft pedal, check the master cylinder and the flexible hose, as tired seals up the line can mimic the same symptoms. A tidy hydraulic system keeps the Primera shifting sweetly, day in, day out.

FAQs

Does a 1991 Nissan Primera have a cluth-slave-cylinder?
Yes. Manual-transmission P10 Primeras run a hydraulic clutch with a master and a cluth-slave-cylinder at the gearbox. This layout is shown in the Nissan P10 Factory Service Manual (CL section) and reflected in the Nissan FAST parts catalogue under Group 30620.

What fluid should be used, and how often should it be changed?
The cluth-slave-cylinder shares the clutch hydraulic circuit’s brake fluid. Use DOT 3 or DOT 4 as per Nissan guidance. A good rule is to flush and bleed every 2 years or roughly 40,000 kilometres, or sooner if the fluid looks dark or the pedal feel degrades.

Can the cluth-slave-cylinder be replaced at home?
With basic tools, a bleed kit, and safe support stands, most DIYers can do it in about 1–2 hours. The key is not rounding the hydraulic line nut (use a flare-nut spanner), fitting the new part cleanly, and bleeding until the pedal is firm and consistent.