Clutch Slave Cylinder Removal & Installation write up

[Truck]

The original poster didn't fully explain everything, and when he copied the FSM, he left an important detail out.

Lets clear this up.

Bleeding ProcedureBleed air according to the following procedure.Clutch dampener --> Clutch Operating Cylinder (slave cylinder)1. Top up reservoir with recommended brake fluid.2. Connect a transparent vinyl tube to air bleeder valve.3. Fully depress clutch pedal several times.4. With clutch pedal depressed, open bleeder valve to releaseair.5. Close bleeder valve.6. Repeat steps 3 through 5 above until brake fluid flows fromair bleeder valve without air bubbles.

Yes, use brake fluid. Dot 3 is the recommended spec. If you are unsure what or where the Clutch Dampener is, it's location is between the Clutch master, and the clutch slave. It is a Box with two hard lines, one to the master cylinder, one to the slave, and also a bleeder valve.

There are links to the FSM for the 89 model year (on this website) with some pictures of these parts, if you need more clarification.

[rsagen]

I got my 5sp in and the clutch feels good. thanks for the thread.

[xUNGRAT3FULx]

i know im bumping old thread :/.....buttt my question is if i jus read this and am gonna try it out tmrw but is it normal for there to be no pressure in the pedal at all when u replace the master and the slave i was gonna bleed but i was waiting for there to be some pressure before i started releasing the valve but pressure never built

[IKGamex]

If anybody is having trouble bleeding, try bypassing the clutch damper system completely by bending the hardline from the reservoir to connect directly to the slave cylinder. I spent over 2 hours trying to bleed the system with no luck; once I removed that damper system I had everything bleed within 15 minutes.

[w8lifter21]

Bump

What exactly does the damper system do and does bypassing it affect the operation of anything else?

[240hatchsx]

Thanks for this I'm about to redo my engine and transmission. Also Ive read that you can use a z31 slave cylinder which is the same the aftermarket nimso slave cylinder ???

[S133P3R]

Bump

What exactly does the damper system do and does bypassing it affect the operation of anything else?

There are no electronics sensors of any type connected to it so it does not affect the ecu or engine operation. You can always reconnect it if you don't like it, the difference at the pedal from this is minimal. I replaced the master cylinder, hardline to stainless, removed the dampener and upgraded the slave to larger Z32 slave. It's pretty easy and most of the parts except a stainless steel master-slave line can be acquired at local parts stores. If you're replacing the clutch, replace the pivot ball and do the dampner removal. It'll save you pain later.

[w8lifter21]

^Thanks for the info! I'm just doing a master/slave rebuild in about 12hrs from. Is

[danshaz82]

There are no electronics sensors of any type connected to it so it does not affect the ecu or engine operation. You can always reconnect it if you don't like it, the difference at the pedal from this is minimal. I replaced the master cylinder, hardline to stainless, removed the dampener and upgraded the slave to larger Z32 slave. It's pretty easy and most of the parts except a stainless steel master-slave line can be acquired at local parts stores. If you're replacing the clutch, replace the pivot ball and do the dampner removal. It'll save you pain later.

i just replaced mine last week and i wasnt sure if the Z32 slave fit or not haha. damn, if only you posted this last week
but to the question, this is what the dampener box looks like

[S133P3R]

Thanks for this I'm about to redo my engine and transmission. Also Ive read that you can use a z31 slave cylinder which is the same the aftermarket nimso slave cylinder ???

i just replaced mine last week and i wasnt sure if the Z32 slave fit or not haha. damn, if only you posted this last week ]

I think the only difference in the slave units is the internal cylinder, which is stamped on the outside casting. The stock slave said 5/16 and the new "nismo z32" unit I ordered off of eBay said 3/4.