D90 Clutch

sirjond · Oct 20, 2014

So, I went to take a ride in the 90 this weekend and I couldn't get her to go in to gear. The clutch feels like there's nothing there. I had the slave cylinder replaced about 2.5 years ago. Is it telling me now that maybe my master cylinder is gone?? Just an fyi...no leakage that I can find anywhere.

Any suggestions/thoughts, appreciated.

1of40 · Oct 20, 2014

How often do you drive it? This old tech likes lots of attention.

Red90 · Oct 20, 2014

More information needed....

Is there any fluid loss in the reservoir? Are you saying you can push the pedal and there is no resistance, or can you not push the pedal at all?

sirjond · Oct 20, 2014

Red90 said:
More information needed....

Is there any fluid loss in the reservoir? Are you saying you can push the pedal and there is no resistance, or can you not push the pedal at all?

I can push the pedal and there is slight resistance. When I look in the reservoir I don't see fluid. Should you see fluid to the top? I am no mechanic.

As for how often I drive it - I know you guys hate to hear this, but this vehicle is mainly a weekender during the spring/summer/fall months.

Red90 · Oct 20, 2014

Yes, the reservoir should be full of fluid, so it has leaked out and you now have air in the system. Add some fluid and, if needed, bleed it to get it working.

Look in the footwell below the clutch pedal for a master cylinder leak. Look at the bellhousing drain for a slave cylinder leak.

If replacing....make sure you use OEM branded cylinders ONLY. No-name brand ones have a very high failure rate. It is best to replace both slave and master at the same time along with the flex hose.

sirjond · Oct 20, 2014

Red90 said:
Yes, the reservoir should be full of fluid, so it has leaked out and you now have air in the system. Add some fluid and, if needed, bleed it to get it working.

Look in the footwell below the clutch pedal for a master cylinder leak. Look at the bellhousing drain for a slave cylinder leak.

If replacing....make sure you use OEM branded cylinders ONLY. No-name brand ones have a very high failure rate. It is best to replace both slave and master at the same time along with the flex hose.

Thank you! I will give that a try. Any suggestion on brand fluid?

As for the cylinders, I am almost 100% sure the mechanic replaced both cylinders and he buys from RN.

javelinadave · Oct 20, 2014

Red90 said:
If replacing....make sure you use OEM branded cylinders ONLY. No-name brand ones have a very high failure rate. It is best to replace both slave and master at the same time along with the flex hose.

Pay once and cry once. I went round and round with "off brand" hydraulic parts and will NEVER do that again.

Red90 · Oct 20, 2014

Any DOT 3 or 4 brake fluid is fine, IMO.

RN sells aftermarket and genuine parts, so it could be either. If they are the no-name Chinese knockoffs, it is not unexpected that one has failed.

If only one cylinder was replaced, then hopefully it is the other one that has gone. If it is the master, then normally filling up will get it working and no bleeding is needed. If it has leaked into the footwell, get it cleaned up as the brake fluid eats the paint very quickly.

Davis · Oct 20, 2014

You can also look into having them resleeved--that will pretty much last for life and is the best way to go. There are threads here you can search for the companies that do it...

D90 Clutch

sirjond

1of40

Red90

sirjond

Red90

sirjond

javelinadave

Red90

Davis

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