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Old 05-24-2014, 11:53 PM   #1
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major slave failure

ok, this is the story...

After finally finding the time to re-install the gearbox with the new clutch and flywheel, the very first time I pushed the clutch pedal to get the engine running the pedal went to the floor and the engine started.

I didn't put too much attention until I noticed that I had a major leak (more like pouring) fluid from the bottom of the bellhousing..

What could have failed on the slave? It is possible that the plunger was not properly seated and when I pushed the clutch got out of the way, allowing the piston inside the slave body to slide out of the cylinder itself causing the major leak?

What are the probabilities that the new clutch got damaged with all that hydraulic fluid pouring out with the engine running?

I have the feeling that I will have to remove the transmission mounts to be able to lower it a bit to remove the slave, how hard would this be..?

Thank you for your comments

Regards, Gilles
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Old 05-25-2014, 07:42 AM   #2
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Quote:
Originally Posted by Gilles View Post
ok, this is the story...

After finally finding the time to re-install the gearbox with the new clutch and flywheel, the very first time I pushed the clutch pedal to get the engine running the pedal went to the floor and the engine started.

I didn't put too much attention until I noticed that I had a major leak (more like pouring) fluid from the bottom of the bellhousing..

What could have failed on the slave? It is possible that the plunger was not properly seated and when I pushed the clutch got out of the way, allowing the piston inside the slave body to slide out of the cylinder itself causing the major leak?

What are the probabilities that the new clutch got damaged with all that hydraulic fluid pouring out with the engine running?

I have the feeling that I will have to remove the transmission mounts to be able to lower it a bit to remove the slave, how hard would this be..?

Thank you for your comments

Regards, Gilles
Release any hydrualic pressure on the slave and it will come out with the trans still in place.
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Old 05-26-2014, 04:19 AM   #3
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The clutch should not be damaged, but may be contaminated with brake fluid.

If it were me, I'd investigate why the slave cylinder was leaking by removing and inspecting it. My first thought is that the pressure popped the front of it off because it was not engaging the clutch release arm correctly . That is pure speculation as I have never taken a Boxster clutch slave apart, but I have taken plenty of other slave cylinders apart and it would be true for them. If true, you have brake fluid and possibly parts in the bell housing, as well as a mis-installed clutch release arm, meaning the clutch needs to be removed and re-installed.

Or

The slave cylinder seal happened to spring a huge leak and was ready to go anyway. In that case the front of the slave cylinder is not popped off, and you need to fix the sealing problem only. You still face possible contamination of the clutch disk, and running it that way will damage the clutch, which leaves two options:

1) Put it back together with the seal fixed, and see how the clutch feels. It will likely be grabby and even stink if contaminated - that means pull it all apart and clean everything with brake cleaner. Running for anything more than just getting the first indication the clutch is contaminated will damage the clutch.

2) Strike first by pulling it all apart and cleaning everything with brake cleaner to know everything is correct.

With a new clutch I'd go with #2, with and old clutch I'd go with #1.

I don't think that trying to clean it while assembled would be effective at all, meaning spraying brake cleaner in to the bell housing - that could take lubricant out of the bearing as well.

I've not removed a slave cylinder with the engine installed, but it would be tight! Good luck and keep us posted!
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Old 05-26-2014, 12:43 PM   #4
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I BET YOU'LL BE FINE once you replace the slave and you don't need to remove the trans to do so.
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Last edited by woodsman; 05-26-2014 at 12:45 PM.
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