shadow
Senior Member
- Joined
- Jan 19, 2017
- Threads
- 3
- Messages
- 364
- Reaction score
- 230
- Location
- Philippines
- Vehicle(s)
- 11 STI, 15 CRV, 16 Civic RS Turbo, 18 Civic Type R
- Thread starter
- #1
I noticed a few drops of brake fluid on the aluminum pan right below the clutch slave cylinder. I have done the following to my clutch system:
1. CMC adjustment for maximum fluid displacement. See video in the link below:
https://www.civicx.com/forum/threads/type-r-tranny-issues-still.28440/page-11#post-482392
2. Clutch delay valve removal
3. PRL clutch line
With modification #1 above, everything was fine.
After mods #2 & #3, I noticed the droplets. The first thing I did was to check the clutch line and delay valve removal sides. Both were clean and dry. The delay valve side had a new EDPM o ring because the original one ripped. Further inspection showed a pressure relief valve below the slave cylinder to be the source of the fluid. That means the slave stroke has maximized and excess pressure vented out.
The delay valve only delays the fluid flow, but the volume moved by the master cylinder is the same. That can't be the problem.
That leaves the clutch line. I'm guessing with the OEM rubber line, the excess pressure expands the hose. With the PRL braided line, it doesn't expand so out the relief valve it goes.
Since then, I've reduced pedal travel by half a turn on the clutch pedal stopper bolt. The master cylinder rod was adjusted accordingly. It was still venting out some fluid.
I will try to adjust it some more and report my findings here.
1. CMC adjustment for maximum fluid displacement. See video in the link below:
https://www.civicx.com/forum/threads/type-r-tranny-issues-still.28440/page-11#post-482392
2. Clutch delay valve removal
3. PRL clutch line
With modification #1 above, everything was fine.
After mods #2 & #3, I noticed the droplets. The first thing I did was to check the clutch line and delay valve removal sides. Both were clean and dry. The delay valve side had a new EDPM o ring because the original one ripped. Further inspection showed a pressure relief valve below the slave cylinder to be the source of the fluid. That means the slave stroke has maximized and excess pressure vented out.
The delay valve only delays the fluid flow, but the volume moved by the master cylinder is the same. That can't be the problem.
That leaves the clutch line. I'm guessing with the OEM rubber line, the excess pressure expands the hose. With the PRL braided line, it doesn't expand so out the relief valve it goes.
Since then, I've reduced pedal travel by half a turn on the clutch pedal stopper bolt. The master cylinder rod was adjusted accordingly. It was still venting out some fluid.
I will try to adjust it some more and report my findings here.
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